Publications (104)
Analysis of the dynamical cluster approximation for the Hubbard model
K. Aryanpour, M. H. Hettler, M. Jarrell
We examine a central approximation of the recently introduced Dynamical Cluster Approximation (DCA) by example of the Hubbard model. By both analytical and numerical means we study…
Suppression of d-wave superconductivity in the checkerboard Hubbard model
D. G. S. P. Doluweera, A. Macridin, T. A. Maier +2
Using a dynamical cluster quantum Monte Carlo approximation we investigate the d-wave superconducting transition temperature in the doped 2D repulsive Hubbard model with a we…
Dynamics of Impurity and Valence Bands in GaMnAs within the Dynamical Mean Field Approximation
M. A. Majidi, J. Moreno, M. Jarrell +2
We calculate the density-of-states and the spectral function of GaMnAs within the dynamical mean-field approximation. Our model includes the competing effects of the strong spin-or…
Phase Diagram of the Hubbard Model: Beyond the Dynamical Mean Field
M. Jarrell, Th. Maier, M. H. Hettler +1
The Dynamical Cluster Approximation (DCA) is used to study non-local corrections to the dynamical mean field phase diagram of the two-dimensional Hubbard model. Regions of antiferr…
First Principle Local Density Approximation Description of the Electronic Properties of Ferroelectric Sodium Nitrite
C. E. Ekuma, M. Jarrell, J. Moreno +4
The electronic structure of the ferroelectric crystal, NaNO, is studied by means of first-principles, local density calculations. Our ab-initio, non-relativistic calculations e…
Parquet approximation for the 4x4 Hubbard cluster
S. X. Yang, H. Fotso, J. Liu +6
We present a numerical solution of the parquet approximation (PA), a conserving diagrammatic approach which is self-consistent at both the single-particle and the two-particle leve…
On the origin of the pseudogap in underdoped cuprates
Th. A. Maier, M. Jarrell, A. Macridin +1
We investigate the microscopic origin of the pseudogap in the weakly doped 2D Hubbard model using Quantum Monte Carlo within the dynamical cluster approximation. We compare our res…
Typical-medium, multiple-scattering theory for disordered systems with Anderson localization
H. Terletska, Y. Zhang, L. Chioncel +2
The typical medium dynamical cluster approximation (TMDCA) is reformulated in the language of multiple scattering theory to make possible first principles calculations of the elect…
Study of off-diagonal disorder using the typical medium dynamical cluster approximation
H. Terletska, C. E. Ekuma, C. Moore +3
We generalize the typical medium dynamical cluster approximation (TMDCA) and the local Blackman, Esterling, and Berk (BEB) method for systems with off-diagonal disorder. Using our…
Semi-analytical solution of the Kondo model in a magnetic field
C. Slezak, S. Kehrein, Th. Pruschke +1
The single impurity Kondo model at zero temperature in a magnetic field is solved by a semi-analytical approach based on the flow equation method. The resulting problem is shown to…
Spectral Properties of Holstein and Breathing Polarons
C. Slezak, A. Macridin, G. A. Sawatzky +2
We calculate the spectral properties of the one-dimensional Holstein and breathing polarons using the self-consistent Born approximation. The Holstein model electron-phonon couplin…
Analytic Continuation of Quantum Monte Carlo Data by Stochastic Analytical Inference
S. Fuchs, T. Pruschke, M. Jarrell
We present an algorithm for the analytic continuation of imaginary-time quantum Monte Carlo data which is strictly based on principles of Bayesian statistical inference. Within thi…
Multi-scale Extensions to Quantum Cluster Methods for Strongly Correlated Electron Systems
C. Slezak, M. Jarrell, Th. Maier +1
A numerically implementable Multi-scale Many-Body approach to strongly correlated electron systems is introduced. An extension to quantum cluster methods, it approximates correlati…
Role of the van Hove Singularity in the Quantum Criticality of the Hubbard Model
K. -S. Chen, S. Pathak, S. -X. Yang +5
A quantum critical point (QCP), separating the non-Fermi liquid region from the Fermi liquid, exists in the phase diagram of the 2D Hubbard model [Vidhyadhiraja et. al, Phys. Rev.…
Multi-Orbital Hubbard Model in Infinite Dimensions: Quantum Monte Carlo Calculation
J. E. Han, M. Jarrell, D. L. Cox
Using Quantum Monte Carlo we compute thermodynamics and spectra for the orbitally degenerate Hubbard model in infinite spatial dimensions. With increasing orbital degeneracy we fin…
Dynamical Cluster Approximation Employing FLEX as a Cluster Solver
K. Aryanpour, M. H. Hettler, M. Jarrell
We employ the Dynamical Cluster Approximation (DCA) in conjunction with the Fluctuation Exchange Approximation (FLEX) to study the Hubbard model. The DCA is a technique to systemat…
Transport Properties of the Infinite Dimensional Hubbard Model
Th. Pruschke, D. L. Cox, M. Jarrell
Results for the optical conductivity and resistivity of the Hubbard model in infinite spatial dimensions are presented. At half filling we observe a gradual crossover from a normal…
Validity of the spin-susceptibility "glue" approximation for pairing in the two-dimensional Hubbard model
E. Khatami, A. Macridin, M. Jarrell
We examine the validity of the weak coupling spin-susceptibility "glue" approximation (SSGA) in a two-dimensional Hubbard model for cuprates. For comparison, we employ the well-est…
Phonon localization in binary alloys with diagonal and off-diagonal disorder: A cluster Green's function approach
Wasim Raja Mondal, T. Berlijn, M. Jarrell +1
We report the development and application of a new method for carrying out computational investigations of the effects of mass and force-constant (FC) disorder on phonon spectra. T…
Spin Susceptibility Representation of the Pairing Interaction for the two-dimensional Hubbard Model
T. A. Maier, M. Jarrell, D. J. Scalapino
Using numerical dynamic cluster quantum Monte Carlo results, we study a simple approximation for the pairing interaction of a two-dimensional Hubbard model with an on-site Coulomb…
Low-temperature coherence in the periodic Anderson model: Predictions for photoemission of heavy Fermions
A. N. Tahvildar-Zadeh, M. Jarrell, J. K. Freericks
We present numerically exact predictions of the periodic and single-impurity Anderson models to address photoemission experiments on heavy Fermion systems. Unlike the single impuri…
Kinetic energy driven pairing
Th. A. Maier, M. Jarrell, A. Macridin +1
Pairing occurs in conventional superconductors through a reduction of the electronic potential energy accompanied by an increase in kinetic energy, indicating that the transition i…
Cluster solver for dynamical mean-field theory with linear scaling in inverse temperature
E. Khatami, C. R. Lee, Z. J. Bai +2
Dynamical mean field theory and its cluster extensions provide a very useful approach for examining phase transitions in model Hamiltonians, and, in combination with electronic str…
Physics of cuprates with the two-band Hubbard model - The validity of the one-band Hubbard model
A. Macridin, Th. Maier, M. Jarrell +1
We calculate the properties of the two-band Hubbard model using the Dynamical Cluster Approximation. The phase diagram resembles the generic phase diagram of the cuprates, showing…
Spectral changes in layered -electron systems induced by Kondo hole substitution in the boundary-layer
Sudeshna Sen, J. Moreno, M. Jarrell +1
We investigate the effect of disorder on the dynamical spectrum of layered -electron systems. With random dilution of -sites in a single Kondo insulating layer, we explore th…
The low-energy scale of the periodic Anderson model
Th. Pruschke, R. Bulla, M. Jarrell
Wilson's Numerical Renormalization Group method is used to study the paramagnetic ground state of the periodic Anderson model within the dynamical mean-field approach. For the part…
Systematic analysis of a spin-susceptibility representation of the pairing interaction in the 2D Hubbard model
T. A. Maier, A. Macridin, M. Jarrell +1
A dynamic cluster quantum Monte Carlo algorithm is used to study a spin susceptibility representation of the pairing interaction for the two-dimensional Hubbard model with an on-si…
Identifying structural changes with unsupervised machine learning methods
Nicholas Walker, Ka-Ming Tam, Brian Novak +1
Unsupervised machine learning methods are used to identify structural changes using the melting point transition in classical molecular dynamics simulations as an example applicati…
Quantum Cluster Theories
Th. Maier, M. Jarrell, Th. Pruschke +1
Quantum cluster approaches offer new perspectives to study the complexities of macroscopic correlated fermion systems. These approaches can be understood as generalized mean-field…
Absence of superconductivity in the 2D Hubbard model
T. A. Maier, M. Jarrell, T. C. Schulthess +1
After receiving a number of comments and reviews from our colleagues who have suggested that our results could be greatly improved by other methods of extrapolation, we have decide…
On the Nature of Localization in Ti doped Si
Yi Zhang, R. Nelson, K. -M. Tam +7
Intermediate band semiconductors hold the promise to significantly improve the efficiency of solar cells, but only if the intermediate impurity band is metallic. We apply a recentl…
Absence of a Slater Transition in The Two-Dimensional Hubbard Model
S. Moukouri, M. Jarrell
We present well-controlled results on the metal to insulator transition (MIT) within the paramagnetic solution of the dynamical cluster approximation (DCA) in the two-dimensional H…
Magnetic Phase Diagram of Hubbard Model in Three Dimensions: the Second-Order Local Approximation
A. N. Tahvildar-Zadeh, J. K. Freericks, M. Jarrell
A local, second-order (truncated) approximation is applied to the Hubbard model in three dimensions. Lowering the temperature, at half-filling, the paramagnetic ground state become…
Electronic, structural, and elastic properties of metal nitrides XN (X = Sc, Y): A first principle study
C. E. Ekuma, D. Bagayoko, M. Jarrell +1
We utilized a simple, robust, first principle method, based on basis set optimization with the BZW-EF method, to study the electronic and related properties of transition metal mon…
A Non-Crossing Approximation for the Study of Intersite Correlations
Th. Maier, M. Jarrell, Th. Pruschke +1
We develop a Non-Crossing Approximation (NCA) for the effective cluster problem of the recently developed Dynamical Cluster Approximation (DCA). The DCA technique includes short-ra…
The Pairing Interaction in the 2D Hubbard Model
T. A. Maier, M. Jarrell, D. J. Scalapino
A dynamic cluster quantum Monte Carlo approximation is used to study the effective pairing interaction of a 2D Hubbard model with a near neighbor hopping and an on-site Coulomb…
Competing magnetic states, disorder, and the magnetic character of Fe3Ga4
J. H. Mendez, C. E. Ekuma, Y. Wu +11
The physical properties of metamagnetic FeGa single crystals are investigated to explore the sensitivity of the magnetic states to temperature, magnetic field, and sample h…
Mean-field embedding of the dual fermion approach for correlated electron systems
S. -X. Yang, H. Terletska, Z. Y. Meng +2
To reduce the rapidly growing computational cost of the dual fermion lattice calculation with increasing system size, we introduce two embedding schemes. One is the real fermion em…
Dynamics of disordered heavy Fermion systems
A. Chattopadhyay, M. Jarrell
Dynamics of the disordered heavy Fermion model of Dobrosavljevic et al. are calculated using an expression for the spectral function of the Anderson model which is consistent with…
d-wave Superconductivity in the Hubbard Model
Th. Maier, M. Jarrell, Th. Pruschke +1
The superconducting instabilities of the doped repulsive 2D Hubbard model are studied in the intermediate to strong coupling regime with help of the Dynamical Cluster Approximation…
Physical Properties of Single Crystals
J. Li, C. E. Ekuma, I. Vekhter +5
We report both experimental and theoretical investigations of the physical properties of BaMnSbO single crystals. This material exhibits a he…
Electronic Structure and Spectra of CuO
C. E. Ekuma, V. I. Anisimov, J. Moreno +1
We report the electronic structure of monoclinic CuO as obtained from first principles calculations utilizing density functional theory plus effective Coulomb interaction (DFT + U)…
Phonons and the coherence scale of models of heavy fermions
M. Raczkowski, P. Zhang, F. F. Assaad +2
We consider models of heavy fermions in the strong coupling or local moment limit and include phonon degrees of freedom on the conduction electrons. Due to the large mass or low co…
Magnetic Instabilities and Phase Diagram of the Double-Exchange Model in Infinite Dimensions
R. S. Fishman, F. Popescu, G. Alvarez +3
Dynamical mean-field theory is used to study the magnetic instabilities and phase diagram of the double-exchange (DE) model with Hund's coupling J_H >0 in infinite dimensions. In a…
Magnetism in semiconductors: A dynamical mean field study of ferromagnetism in Ga_{1-x}Mn_xAs
K. Aryanpour, J. Moreno, M. Jarrell +1
We employ the dynamical mean field approximation to perform a systematic study of magnetism in Ga_{1-x}Mn_xAs. Our model incorporates the effects of the strong spin-orbit coupling…
Generalized Multiband Typical Medium Dynamical Cluster Approximation: Application to (Ga,Mn)N
Yi Zhang, R. Nelson, Elisha Siddiqui +7
We generalize the multiband typical medium dynamical cluster approximation and the formalism introduced by Blackman, Esterling and Berk so that it can deal with localization in mul…
Finite Cluster Typical Medium Theory for Disordered Electronic Systems
C. E. Ekuma, C. Moore, H. Terletska +4
We use the recently developed typical medium dynamical cluster (TMDCA) approach~[Ekuma \etal,~\textit{Phys. Rev. B \textbf{89}, 081107 (2014)}] to perform a detailed study of the A…
Localization of phonons in mass disordered alloys - A typical medium dynamical cluster approach
Wasim Raja Mondal, T. Berlijn, Juana Moreno +2
The effect of disorder on lattice vibrational modes has been a topic of interest for several decades. In this work, we employ a Green's function based approach, namely the dynamica…
Dual-fermion approach to the Anderson-Hubbard model
P. Haase, S. -X. Yang, T. Pruschke +2
We apply the recently developed dual fermion algorithm for disordered interacting systems to the Anderson-Hubbard model. This algorithm is compared with dynamical cluster approxima…
Absence of hysteresis at the Mott-Hubbard metal-insulator transition in infinite dimensions
J. Schlipf, M. Jarrell, P. G. J. van Dongen +4
The nature of the Mott-Hubbard metal-insulator transition in the infinite-dimensional Hubbard model is investigated by Quantum Monte Carlo simulations down to temperature T=W/140 (…
Pseudogaps in the 2D half-filled Hubbard model
C. Huscroft, M. Jarrell, Th. Maier +2
We study the pseudogaps in the spectra of the half-filled 2D Hubbard model using both finite-size and dynamical cluster approximation (DCA) quantum Monte Carlo calculations. A char…
Quantum Criticality and Incipient Phase Separation in the Thermodynamic Properties of the Hubbard Model
D. Galanakis, E. Khatami, K. Mikelsons +4
Transport measurements on the cuprates suggest the presence of a quantum critical point hiding underneath the superconducting dome near optimal hole doping. We provide numerical ev…
A Typical Medium Dynamical Cluster Approximation for the Study of Anderson Localization in Three Dimensions
C. E. Ekuma, H. Terletska, K. -M. Tam +3
We develop a systematic typical medium dynamical cluster approximation that provides a proper description of the Anderson localization transition in three dimensions (3D). Our meth…
Using off-diagonal confinement as a cooling method
V. G. Rousseau, K. Hettiarachchilage, M. Jarrell +2
In a recent letter [Phys. Rev. Lett. 104, 167201 (2010)] we proposed a new confining method for ultracold atoms on optical lattices, based on off-diagonal confinement (ODC). This m…
A dynamical mean-field approximation study of a tight-binding model for GaMnAs
A. -M. Nili, U. Yu, J. Moreno +2
The magneto-optical properties of the ferromagnetic semiconductor GaMnAs are studied within the dynamical mean-field approximation (DMFA). A material-specific multiba…
Quantum Critical Point at Finite Doping in the 2D Hubbard Model: A Dynamical Cluster Quantum Monte Carlo Study
N. S. Vidhyadhiraja, A. Macridin, C. Sen +2
We explore the Matsubara quasiparticle fraction and the pseudogap of the two-dimensional Hubbard model with the dynamical cluster quantum Monte Carlo method. The character of the q…
Analytic continuation of QMC data with a sign problem
A. Macridin, S. P. Doluweera, M. Jarrell +1
We present a Maximum Entropy method (MEM) for obtaining dynamical spectra from Quantum Monte Carlo data which have a sign problem. By relating the sign fluctuations to the norm of…
Systematic study of d-wave superconductivity in the 2D repulsive Hubbard model
T. A. Maier, M. Jarrell, T. C. Schulthess +2
The cluster size dependence of superconductivity in the conventional two-dimensional Hubbard model, commonly believed to describe high-temperature superconductors, is systematicall…
Dual Fermion Method for Disordered Electronic Systems
H. Terletska, S. -X. Yang, Z. Y. Meng +2
While the coherent potential approximation (CPA) is the prevalent method for the study of disordered electronic systems, it fails to capture non-local correlations and Anderson loc…
The Dynamical Cluster Approximation: A New Technique for Simulations of Strongly Correlated Electron Systems
S. Moukouri, C. Huscroft, M. Jarrell
We present the algorithmic details of the dynamical cluster approximation (DCA) algorithm. The DCA is a fully-causal approach which systematically restores non-local correlations t…
Weak magnetoresistance of disordered heavy fermion systems
A. Chattopadhyay, M. Jarrell, H. R. Krishnamurthy +3
We compare the magnetoresistance of UCuPd with calculations done within the disordered heavy fermion framework of Miranda et al. using a phenomenological spectral f…
Combined density-functional and dynamical cluster quantum Monte Carlo calculations for three-band Hubbard models for hole-doped cuprate superconductors
P. R. C. Kent, T. Saha-Dasgupta, O. Jepsen +5
Using a combined local density functional theory (LDA-DFT) and quantum Monte Carlo (QMC) dynamic cluster approximation approach, the parameter dependence of the superconducting tra…
The Bose-Hubbard model on a triangular lattice with diamond ring-exchange
V. G. Rousseau, K. Hettiarachchilage, K. -M. Tam +2
Ring-exchange interactions have been proposed as a possible mechanism for a Bose-liquid phase at zero temperature, a phase that is compressible with no superfluidity. Using the Sto…
The Dynamical Cluster Approximation: Non-Local Dynamics of Correlated Electron Systems
M. H. Hettler, M. Mukherjee, M. Jarrell +1
We recently introduced the dynamical cluster approximation(DCA), a new technique that includes short-ranged dynamical correlations in addition to the local dynamics of the dynamica…
Superconducting Instability in the Periodic Anderson Model
A. N. Tahvildar-Zadeh, M. H. Hettler, M. Jarrell
Employing a quantum Monte Carlo simulation we find a pairing instability in the normal state of the infinite dimensional periodic Anderson model. Superconductivity arises from a no…
The Dynamical Cluster Approximation (DCA) versus the Cellular Dynamical Mean Field Theory (CDMFT) in strongly correlated electrons systems
K. Aryanpour, Th. A. Maier, M. Jarrell
We are commenting on the article Phys. Rev. {\bf B 65}, 155112 (2002) by G. Biroli and G. Kotliar in which they make a comparison between two cluster techniques, the {\it Cellular…
Protracted Screening in the Periodic Anderson Model
A. N. Tahvildar-Zadeh, M. Jarrell, J. K. Freericks
The asymmetric infinite-dimensional periodic Anderson model is examined with a quantum Monte Carlo simulation. For small conduction band filling, we find a severe reduction in the…
Re-examining the electronic structure of germanium: A first-principle study
C. E. Ekuma, M. Jarrell, J. Moreno +2
We report results from an efficient, robust, ab-initio method for self-consistent calculations of electronic and structural properties of Ge. Our non-relativistic calculations empl…
Comparison of two quantum-cluster approximations
Th. A. Maier, M. Jarrell
We provide microscopic diagrammatic derivations of the the Molecular Coherent Potential Approximation (MCA) and Dynamical Cluster Approximation (DCA) and show that both are Phi-der…
Phase separation in the Hubbard model
A. Macridin, M. Jarrell, Th. Maier
Phase separation in the Hubbard model is investigated with the dynamical cluster approximation. We find that it is present in the paramagnetic solution for values of filling smalle…
Zinc Impurities in the 2D Hubbard model
Th. A. Maier, M. Jarrell
We study the two-dimensional Hubbard model with nonmagnetic Zn impurities modeled by binary diagonal disorder using Quantum Monte Carlo within the Dynamical Cluster Approximation.…
Anomalous Normal-State Properties of High-T Superconductors -- Intrinsic Properties of Strongly Correlated Electron Systems?
Th. Pruschke, M. Jarrell, J. K. Freericks
A systematic study of optical and transport properties of the Hubbard model, based on Metzner and Vollhardt's dynamical mean-field approximation, is reviewed. This model shows inte…
Non Fermi Liquid Dynamics of the Two-Channel Kondo Lattice
M. Jarrell, Hanbin Pang, D. L. Cox +2
The paramagnetic phase of the two-channel Kondo lattice model is examined with a Quantum Monte Carlo simulation in the limit of infinite dimensions. We find non-Fermi-liquid behavi…
Ab initio typical medium theory of substitutional disorder
A. Ãstlin, Y. Zhang, H. Terletska +7
By merging single-site typical medium theory with density functional theory we introduce a self-consistent framework for electronic structure calculations of materials with substit…
Spectral Properties and Bandstructure of Correlated Electron Systems
Th. Pruschke, Th. Obermeier, J. Keller +1
We present -dependent one-particle spectra and corresponding effective bandstructures for the Hubbard model calculated within the dynamical molecular field theory (DM…
Metal-Insulator-Transition in a Weakly interacting Disordered Electron System
C. E. Ekuma, S. -X. Yang, H. Terletska +4
The interplay of interactions and disorder is studied using the Anderson-Hubbard model within the typical medium dynamical cluster approximation. Treating the interacting, non-loca…
High energy kink in the single particle spectra of the two-dimensional Hubbard model
Alexandru Macridin, M. Jarrell, Thomas Maier +1
Employing dynamical cluster quantum Monte Carlo calculations we show that the single particle spectral weight A(k,w) of the one-band two-dimensional Hubbard model displays a high e…
A Quantum Monte Carlo algorithm for non-local corrections to the Dynamical Mean-Field Approximation
M. Jarrell, Th. Maier, C. Huscroft +1
We present the algorithmic details of the dynamical cluster approximation (DCA), with a quantum Monte Carlo (QMC) method used to solve the effective cluster problem. The DCA is a f…
Insensitivity of superconductivity to disorder in the cuprates
A. F. Kemper, D. G. S. P. Doluweera, T. A. Maier +3
Using a dynamical cluster quantum Monte Carlo approximation, we investigate the effect of local disorder on the stability of d-wave superconductivity including the effect of electr…
Pure Mott phases in confined ultracold atomic systems
V. G. Rousseau, G. G. Batrouni, D. E. Sheehy +2
We propose a novel scheme for confining atoms to optical lattices by engineering a spatially-inhomogeneous hopping matrix element in the Hubbard-model (HM) description, a situation…
Optical conductivity of the infinite-dimensional Hubbard model
M. Jarrell, J. K. Freericks, Th. Pruschk
A Monte Carlo-maximum entropy calculation of the optical conductivity of the infinite-dimensional Hubbard model is presented. We show that the optical conductivity displays the ano…
Effect of long-range hopping on Tc in a two-dimensional Hubbard-Holstein model of the cuprates
E. Khatami, A. Macridin, M. Jarrell
We study the effect of long-range hoppings on Tc for the two-dimensional (2D) Hubbard model with and without Holstein phonons using parameters evaluated from band-structure calcula…
Local Density of the Bose Glass Phase
K. Hettiarachchilage, C. Moore, V. G. Rousseau +3
We study the Bose-Hubbard model in the presence of on-site disorder in the canonical ensemble and conclude that the local density of the Bose glass phase behaves differently at inc…
Thermodynamics of the Quantum Critical Point at Finite Doping in the 2D Hubbard Model: A Dynamical Cluster Approximation Study
K. Mikelsons, E. Khatami, D. Galanakis +3
We study the thermodynamics of the two-dimensional Hubbard model within the dynamical cluster approximation. We use continuous time quantum Monte Carlo as a cluster solver to avoid…
The effect of spin-orbit interaction and attractive Coulomb potential on the magnetic properties of GaMnAs
A. -M. Nili, M. A. Majidi, P. Reis +2
We employ the dynamical mean-field approximation to study the magnetic properties of a model relevant for the dilute magnetic semiconductors. Our model includes the spin-orbit coup…
Quantum Criticality Due to Incipient Phase Separation in the Two-dimensional Hubbard Model
E. Khatami, K. Mikelsons, D. Galanakis +4
We investigate the two-dimensional Hubbard model with next-nearest-neighbor hopping, t', using the dynamical cluster approximation. We confirm the existence of a first-order phase-…
Two Quantum Cluster Approximations
Th. A. Maier, O. Gonzalez, M. Jarrell +1
We provide microscopic diagrammatic derivations of the Molecular Coherent Potential Approximation (MCA) and Dynamical Cluster Approximation (DCA) and show that both are Phi-derivab…
Quantum Monte Carlo study of the two-dimensional fermion Hubbard Model
C. N. Varney, C. -R. Lee, Z. J. Bai +3
We report large scale determinant Quantum Monte Carlo calculations of the effective bandwidth, momentum distribution, and magnetic correlations of the square lattice fermion Hubbar…
Magnetic and Dynamic Properties of the Hubbard Model in Infinite Dimensions
M. Jarrell, Thomas Pruschke
An essentially exact solution of the infinite dimensional Hubbard model is made possible by using a self-consistent mapping of the Hubbard model in this limit to an effective singl…
Phase Stability in the Two dimensional Anisotropic Boson Hubbard Hamiltonian
T. Ying, G. G. Batrouni, V. G. Rousseau +4
The two dimensional square lattice hard-core boson Hubbard model with near neighbor interactions has a `checkerboard' charge density wave insulating phase at half-filling and suffi…
Charge Density Wave Driven Ferromagnetism in the Periodic Anderson Model
M. A. Majidi, D. G. S. P. Doluweera, B. Moritz +3
We demonstrate the existence of ferromagnetism in the Periodic Anderson Model (PAM) at conduction-band filling near a quarter. We show that this ferromagnetism is not supported by…
Efficient calculation of the antiferromagnetic phase diagram of the 3D Hubbard model
P. R. C. Kent, M. Jarrell, T. A. Maier +1
The Dynamical Cluster Approximation with Betts clusters is used to calculate the antiferromagnetic phase diagram of the 3D Hubbard model at half filling. Betts clusters are a set o…
First principle electronic, structural, elastic, and optical properties of strontium titanate
C. E. Ekuma, M. Jarrell, J. Moreno +1
We report self-consistent ab-initio electronic, structural, elastic, and optical properties of cubic SrTiO perovskite. Our non-relativistic calculations employed a generalize…
Ground-State Dynamical Correlation Functions: An Approach from Density Matrix Renormalization Group Method
Hanbin Pang, H. Akhlaghpour, M. Jarrell
A numerical approach to ground-state dynamical correlation functions from Density Matrix Renormalization Group (DMRG) is developed. Using sum rules, moments of a dynamic correlatio…
The screening of 4f moments and delocalization in the compressed light rare earths
A. K. McMahan, R. T. Scalettar, M. Jarrell
Spin and charge susceptibilities and the 4f^n, 4f^{n-1}, and 4f^{n+1} configuration weights are calculated for compressed Ce (n=1), Pr (n=2), and Nd (n=3) metals using dynamical me…
Dual Fermion Dynamical Cluster Approach for Strongly Correlated Systems
S. -X. Yang, H. Fotso, H. Hafermann +4
We have designed a new multi-scale approach for Strongly Correlated Systems by combining the Dynamical Cluster Approximation (DCA) and the recently introduced dual-fermion formalis…
Nonlocal Dynamical Correlations of Strongly Interacting Electron Systems
M. H. Hettler, A. N. Tahvildar-Zadeh, M. Jarrell +2
We introduce an extension of the dynamical mean field approximation (DMFA) which retains the causal properties and generality of the DMFA, but allows for systematic inclusion of no…
ARPES Spectra of the Hubbard model
Th. A. Maier, Th. Pruschke, M. Jarrell
We discuss spectra calculated for the 2D Hubbard model in the intermediate coupling regime with the dynamical cluster approximation, which is a non-perturbative approach. We find a…
Dual-fermion approach to interacting disordered fermion systems
S. -X. Yang, P. Haase, H. Terletska +4
We generalize the recently introduced dual fermion (DF) formalism for disordered fermion systems by including the effect of interactions. For an interacting disordered system the c…
The Calculation of Two-Particle Quantities in the Typical Medium Dynamical Cluster Approximation
Y. Zhang, Y. F. Zhang, S. X. Yang +3
The mean-field theory for disordered electron systems without interaction is widely and successfully used to describe equilibrium properties of materials over the whole range of di…