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Nature and strength of interlayer binding in graphite.
The interlayer bonding properties of graphite are computed using an ab initio many-body theory and an equilibrium interlayer binding energy is found in good agreement with most recent experiments.
Semi-Metal-Insulator Transition of the Hubbard Model in the Honeycomb Lattice
Using quantum Monte Carlo and finite-size scaling for the Hubbard model, we find evidence of a zero-temperature transition between the nonmagnetic semi-metal and an antiferromagnetic insulator in the
Long-Range Néel Order in the Triangular Heisenberg Model
We have studied the Heisenberg model on the triangular lattice using several Quantum Monte Carlo (QMC) techniques (up to 144 sites), and exact diagonalization (ED) (up to 36 sites). By studying the
Generalized Lanczos algorithm for variational quantum Monte Carlo
We show that the standard Lanczos algorithm can be efficiently implemented statistically and self-consistently improved, using the stochastic reconfiguration method, which has been recently
Universal quantum criticality in the metal-insulator transition of two-dimensional interacting Dirac electrons
The metal-insulator transition has been a subject of intense research since Nevil Mott has first proposed that the metallic behavior of interacting electrons could turn to the insulating one as
Direct evidence for a gapless $Z_2$ spin liquid by frustrating Néel antiferromagnetism
By direct calculations of the spin gap in the frustrated Heisenberg model on the square lattice, with nearest- ($J_1$) and next-nearest-neighbor ($J_2$) super-exchange couplings, we provide a solid
Gapless spin-liquid phase in the kagome spin-(1)/(2) Heisenberg antiferromagnet
We study the energy and the static spin structure factor of the ground state of the spin-1/2 quantum Heisenberg antiferromagnetic model on the kagome lattice. By the iterative application of a few
A new method for the stabilization of the sign problem in the Green Function Monte Carlo technique is proposed. The method is devised for real lattice Hamiltonians and is based on an iterative
Stable liquid hydrogen at high pressure by a novel Ab initio molecular-dynamics calculation.
An efficient scheme for the molecular dynamics of electronic systems by means of quantum Monte Carlo is introduced, supporting the stability of the liquid phase at approximately 300 GPa and approximately 400 K.
Electron Localization in the Insulating State
The insulating state of matter is characterized by the excitation spectrum, but also by qualitative features of the electronic ground state. The insulating ground wavefunction in fact: (i) sustains