Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR2.7k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR2.4k papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR2.3k papers
- Charles UniversityCZ2.3k papers
- Institute for High Energy PhysicsES2.3k papers
- Institut de Recherche sur les Lois Fondamentales de l'UniversFR2.2k papers
- The Ohio State UniversityUS2.1k papers
- Universidad Autónoma de MadridES2.1k papers
- Rutherford Appleton LaboratoryGB2.1k papers
- European Organization for Nuclear ResearchCH2.1k papers
- University of Wisconsin–MadisonUS2.1k papers
- Joint Institute for Nuclear ResearchRU2k papers
20 papers · 2 filters
High-Temperature Criticality in Strongly Constrained Quantum Systems
Claudio Castelnovo, Claudio Chamon, Christopher Mudry +2
The exotic nature of many strongly correlated materials at reasonably high temperatures, for instance cuprate superconductors in their normal state, has lead to the suggestion that…
Electronic Properties of Disordered Two-Dimensional Carbon
N. M. R. Peres, F. Guinea, A. H. Castro Neto
Two-dimensional carbon, or graphene, is a semi-metal that presents unusual low-energy electronic excitations described in terms of Dirac fermions. We analyze in a self-consistent w…
First-principles Calculation of the Single Impurity Surface Kondo Resonance
Chiung-Yuan Lin, A. H. Castro Neto, B. A. Jones
We have performed first-principles calculation of the surface and bulk wavefunctions of the Cu(111) surface and their hybridization energies to a Co adatom, including the potential…
Electron-electron interactions and the phase diagram of a graphene bilayer
Johan Nilsson, A. H. Castro Neto, N. M. R. Peres +1
We study the effects of long and short-range electron-electron interactions in a graphene bilayer. Using a variational wavefunction technique we show that in the presence of long-r…
Magneto-optical evidence of double exchange in a percolating lattice
G. Caimi, A. Perucchi, L. Degiorgi +5
Substituting by in ferromagnetic leads to a percolation limited magnetic ordering. We present and discuss magneto-optical data of the series,…
High-precision finite-size scaling analysis of the quantum-critical point of S=1/2 Heisenberg antiferromagnetic bilayers
Ling Wang, K. S. D. Beach, Anders W. Sandvik
We use quantum Monte Carlo (stochastic series expansion) and finite-size scaling to study the quantum critical points of two S=1/2 Heisenberg antiferromagnets in two dimensions: a…
Junctions of three quantum wires
Masaki Oshikawa, Claudio Chamon, Ian Affleck
We study a junction of three quantum wires enclosing a magnetic flux. The wires are modeled as single-channel spinless Tomonaga-Luttinger liquids. This is the simplest problem of a…
Ground state projection of quantum spin systems in the valence bond basis
Anders W. Sandvik
A Monte Carlo method for quantum spin systems is formulated in the basis of valence bond (singlet pair) states. The non-orthogonality of this basis allows for an efficient importan…
Site dilution of quantum spins in the honeycomb lattice
Eduardo V. Castro, N. M. R. Peres, K. S. D. Beach +1
We discuss the effect of site dilution on both the magnetization and the density of states of quantum spins in the honeycomb lattice, described by the antiferromagnetic Heisenberg…
Coexistence of gapless excitations and commensurate charge-density wave in the 2H-transition metal dichalcogenides
Ryan Barnett, Anatoli Polkovnikov, Eugene Demler +2
An unexpected feature common to 2H-transition metal dichalcogenides (2H-TMDs) is revealed with first-principles Wannier functions analysis of the electronic structure of the protot…
Correlations and confinement in non-planar two-dimensional dimer models
A. W. Sandvik, R. Moessner
We study classical hard-core dimer models on the square lattice with links extending beyond nearest-neighbors. Numerically, using a directed-loop Monte Carlo algorithm, we find tha…
Coulomb Interactions and Ferromagnetism in Pure and Doped Graphene
N. M. R. Peres, F. Guinea, A. H. Castro Neto
We study the presence of ferromagnetism in the phase diagram of the two-dimensional honeycomb lattice close to half-filling (graphene) as a function of the strength of the Coulomb…
No sliding in time
Kirill Shtengel, Chetan Nayak, Waheb Bishara +1
In this letter, we analyse the following apparent paradox: As has been recently proved by Hastings (cond-mat/0305505), under a general set of conditions, if a local Hamiltonian has…
Electronic Properties of Two-Dimensional Carbon
N. M. R. Peres, F. Guinea, A. H. Castro Neto
We present a theoretical description of the electronic properties of graphene in the presence of disorder, electron-electron interactions, and particle-hole symmetry breaking. We s…
Heat Bath Approach to Landau Damping and Pomeranchuk Quantum Critical Points
Johan Nilsson, A. H. Castro Neto
We study the problem of the damping of collective modes close to a Pomeranchuk quantum critical point in a Fermi liquid. In analogy with problems in dissipative open quantum system…
Functional Renormalization Group Analysis of the Half-filled One-dimensional Extended Hubbard Model
Ka-Ming Tam, Shan-Wen Tsai, David K. Campbell
We study the phase diagram of the half-filled one-dimensional extended Hubbard model at weak coupling using a novel functional renormalization group (FRG) approach. The FRG method…
Fixed Points of the Dissipative Hofstadter Model
E. Novais, F. Guinea, A. H. Castro Neto
The phase diagram of a dissipative particle in a periodic potential and a magnetic field is studied in the weak barrier limit and in the tight-biding regime. For the case of half f…
From quantum mechanics to classical statistical physics: generalized Rokhsar-Kivelson Hamiltonians and the "Stochastic Matrix Form" decomposition
Claudio Castelnovo, Claudio Chamon, Christopher Mudry +1
Quantum Hamiltonians that are fine-tuned to their so-called Rokhsar-Kivelson (RK) points, first presented in the context of quantum dimer models, are defined by their representatio…
Weak ferromagnetism and spiral spin structures in honeycomb Hubbard planes
M A N Araujo, N M R Peres
Within the Hartree Fock- RPA analysis, we derive the spin wave spectrum for the weak ferromagnetic phase of the Hubbard model on the honeycomb lattice. Assuming a uniform magnetiza…
Reply to Millis et al. on "A Tale of Two Theories: Quantum Griffiths Effects in Metallic Systems"
A. H. Castro Neto, B. A. Jones
In a recent paper (cond-mat/0411197) we showed the equivalence of two seemingly contradictory theories on Griffiths-McCoy singularities (GMS) in metallic antiferromagnets close to…