Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR2.1k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR2k papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR1.9k papers
- University of California, RiversideUS1.9k papers
- University of VirginiaUS1.8k papers
- Rice UniversityUS1.8k papers
- Fermi National Accelerator LaboratoryUS1.8k papers
- Princeton UniversityUS1.8k papers
- Charles UniversityCZ1.8k papers
- University of Maryland, College ParkUS1.7k papers
- Tata Institute of Fundamental ResearchIN1.7k papers
- University of Notre DameUS1.7k papers
23 papers · 2 filters
Static and Dynamical Properties of the Ferromagnetic Kondo Model with Direct Antiferromagnetic Coupling Between the localized Electrons
Seiji Yunoki, Adriana Moreo
The phase diagram of the Kondo lattice Hamiltonian with ferromagnetic Hund's coupling in the limit where the spin of the localized electrons is classical is analyzed in on…
Hidden Duality and associated instabilities of Tomonaga-Luttinger Liquid on Lattice
Z. N. C. Ha
Hidden duality and associated instabilities of the spinless Luttinger liquid on lattice are reported. The local quantum fluctuations and the long-distance chiral modes compete and…
Numerical Calculations of the B1g Raman Spectrum of the Two-Dimensional Heisenberg Model
A. W. Sandvik, S. Capponi, D. Poilblanc +1
The B1g Raman spectrum of the two-dimensional S=1/2 Heisenberg model is discussed within Loudon-Fleury theory at both zero and finite temperature. The exact T=0 spectrum for lattic…
Effect of Spin-1 Impurities in Dimerized Heisenberg Chains
P. M. Hansen, J. A. Riera, A. Delia +1
The effects of spin-1 impurities introduced in dimerized antiferromagnetic spin chains are studied using Lanczos diagonalization and quantum Monte Carlo simulations. Firstly, the m…
Absence of Localization in Certain Field Effect Transistors
S Washburn, D Popovic, KP Li +1
We review some experimental and theoretical results on the metal-to-insulator transition (MIT) observed at zero magnetic field (B=0) in several two-dimensional electron systems (2D…
Violation of Kohler's rule by the magnetoresistance of a quasi-two-dimensional organic metal
Ross H. McKenzie, J. S. Qualls, S. Y. Han +1
The interlayer magnetoresistance of the quasi-two-dimensional metal -(BEDT-TTF)KHg(SCN) is considered. In the temperature range from 0.5 to 10 K and for fields up to 10…
Systematic numerical study of spin-charge separation in one dimension
M. G. Zacher, E. Arrigoni, W. Hanke +1
The problem of spin-charge separation is analyzed numerically in the metallic phase of the one-band Hubbard model in one dimension by studying the behavior of the single-particle G…
Revisiting two holes in a locally antiferromagnetic background: the role of retardation and Coulomb repulsion effects
Jose Riera, Elbio Dagotto
The problem of two holes in the presence of strong antiferromagnetic fluctuations is revisited using computational techniques. Two-dimensional clusters and 2-leg ladders with up to…
Conductance Fluctuations Near the Two-Dimensional Metal-Insulator Transition
K. P. Li, Dragana Popovic, S. Washburn
Measurements of conductance on short, wide, high-mobility Si-MOSFETs reveal both a two-dimensional metal-insulator transition (MIT) at moderate temperatures (1 4~K) an…
Metal-Insulator Transition in a Low-Mobility Two-Dimensional Electron System
Dragana Popovic, A. B. Fowler, S. Washburn
We have varied the disorder in a two-dimensional electron system in silicon by applying substrate bias. When the disorder becomes sufficiently low, we observe the emergence of the…
Dynamic Spin Response for Heisenberg Ladders
J. Piekarewicz, J. R. Shepard
We employ the recently proposed plaquette basis to investigate static and dynamic properties of isotropic 2-leg Heisenberg spin ladders. Simple non-interacting multi-plaquette stat…
Experimental Evidence of a Haldane Gap in an S = 2 Quasi-linear Chain Antiferromagnet
G. E. Granroth, M. W. Meisel, M. Chaparala +3
The magnetic susceptibility of the quasi-linear chain Heisenberg antiferromagnet (2,-bipyridine)trichloromanganese(III), MnCl_{3}(bipy), has been measured from 1.8 to 3…
Enhancement of Antiferromagnetic Correlations Induced by Nonmagnetic Impurities: Origin and Predictions for NMR Experiments
Markus Laukamp, George Balster Martins, Claudio J. Gazza +5
Spin models that have been proposed to describe dimerized chains, ladders, two dimensional antiferromagnets, and other compounds are here studied when some spins are replaced by sp…
The metal-insulator transition in Si:X: Anomalous response to a magnetic field
M. P. Sarachik, D. Simonian, S. V. Kravchenko +3
The zero-temperature magnetoconductivity of just-metallic Si:P scales with magnetic field, H, and dopant concentration, n, lying on a single universal curve. We note that Si:P, Si:…
Block-Spin Approach to Electron Correlations
P. Monthoux
We consider an expansion of the ground state wavefunction of quantum lattice many-body systems in a basis whose states are tensor products of block-spin wavefunctions. We demonstra…
High-field Electron Spin Resonance of Cu_{1-x}Zn_{x}GeO_{3}
A. K. Hassan, L. A. Pardi, G. B. Martins +2
High-Field Electron Spin Resonance measurements were made on powder samples of Cu_{1-x}Zn_{x}GeO_{3} (x=0.00, 0.01, 0.02, 0.03 and 0.05) at different frequencies (95, 110, 190, 220…
Phase Separation in Electronic Models for Manganites
S. Yunoki, J. Hu, A. L. Malvezzi +3
The Kondo lattice Hamiltonian with ferromagnetic Hund's coupling as a model for manganites is investigated. The classical limit for the spin of the (localized) electrons i…
Insulator-Metal Transition in One Dimension Induced by Long-Range Electronic Interactions
D. Poilblanc, S. Yunoki, S. Maekawa +1
The effects of a long range electronic potential on a one dimensional commensurate Charge Density Wave (CDW) state are investigated. Using numerical techniques it is shown that a t…
Dynamical properties of the spin-Peierls compound α'--NaV2O5
D. Augier, D. Poilblanc, S. Haas +2
Dynamical properties of the novel inorganic spin-Peierls compound α'--NaV2O5 are investigated using a one-dimensional dimerized Heisenberg model. By exact diagonalizations of chain…
Local Enhancement of Antiferromagnetic Correlations by Nonmagnetic Impurities
George Balster Martins, Markus Laukamp, Jose Riera +1
The local enhancement of antiferromagnetic correlations near vacancies observed in a variety of spin systems is analyzed in a single framework. Variational calculations suggest tha…
Hole Doping Evolution of the Quasiparticle Band in Models of Strongly Correlated Electrons for the High-T_c Cuprates
Daniel Duffy, Alexander Nazarenko, Stephan Haas +3
Quantum Monte Carlo (QMC) and Maximum Entropy (ME) techniques are used to study the spectral function of the one band Hubbard model in strong coupling including a ne…
Dynamics of the spin-half Heisenberg chain at intermediate temperatures
O. A. Starykh, A. W. Sandvik, R. R. P. Singh
Combining high-temperature expansions with the recursion method and quantum Monte Carlo simulations with the maximum entropy method, we study the dynamics of the spin-1/2 Heisenber…
On the vertex corrections in antiferromagnetic spin fluctuation theories
Andrey V. Chubukov, Philippe Monthoux, Dirk K. Morr
We argue that recent calculations by Amin and Stamp (PRL 77, 301 (1996); cond-mat/9601086) overestimate the strength of the vertex corrections in the spin-fermion model for cuprate…