Two-dimensional XXZ model ground-state properties using an analytic Lanczos expansion

Ground-state properties of two-dimensional dimerized Heisenberg models

J. Sirker, ∗ A. Klümper, † and K. Hamacher ‡ Theoretische Physik I, Universität Dortmund, Otto-Hahn-Str. 4, D-44221 Dortmund, Germany (Dated: February 1, 2008) The purpose of this paper is to investigate the ground-state properties of two-dimensional Heisenberg models on a square lattice with a given dimerization. Our aim is threefold: First, we want to investigate the dimensional transition fr...

Metallic ground state in an ion-gated two-dimensional superconductor.

Recently emerging two-dimensional (2D) superconductors in atomically thin layers and at heterogeneous interfaces are attracting growing interest in condensed matter physics. Here, we report that an ion-gated zirconium nitride chloride surface, exhibiting a dome-shaped phase diagram with a maximum critical temperature of 14.8 kelvin, behaves as a superconductor persisting to the 2D limit. The su...

Ground-state properties and superfluidity of two- and quasi-two-dimensional solid 4He.

In a recent study we have reported a new type of trial wavefunction symmetric under the exchange of particles, which is able to describe a supersolid phase. In this work, we use the diffusion Monte Carlo method and this model wavefunction to study the properties of solid (4)He in two- and quasi-two-dimensional geometries. In the purely two-dimensional (2D) case, we obtain results for the total ...

STATISTICAL-MECHANICAL CALCULATION OF THERMODYNAMIC PROPERTIES OF ALBITE USING A TWO-DIMENSIONAL MODEL

Exact ground-state properties of a one-dimensional Coulomb gas

The ground-state properties of a single-component one-dimensional Coulomb gas are investigated. We use Bose-Fermi mapping for the ground-state wave function which permits solution of the Fermi sign problem in the following respects: (i) the nodal surface is known, permitting exact calculations; and (ii) evaluation of determinants is avoided, reducing the numerical complexity to that of a bosoni...