arXiv subjects

Massimo Boninsegni

Publications and source records attributed to Massimo Boninsegni.

93 records · Page 6Linked to original sources

arXiv2004

Low temperature phase diagram of condensed para-Hydrogen in two dimensions

Extensive Path Integral Monte Carlo simulations of condensed para-Hydrogen in two dimensions at low temperature have been carried out. In the zero temperature limit, the system is a crystal at equilibrium, with a triangular lattice structure. No metastable liquid phase is observed, as the system remains a solid down to the spinodal density, and breaks down into solid clusters at lower densities. The equilibrium crystal is found to melt at a temperature close to 7 K.

cond-mat.stat-mech↗

arXiv1999

Atoms in nanotubes: small dimensions and variable dimensionality

Newly discovered carbon nanotubes provide an environment in which small atoms move relatively freely. An assembly of such atoms provides a realization of a quasi-one dimensional system which is an ideal testing ground for concepts and mathematics of statistical physics.

cond-mat.stat-mech↗

arXiv1994

Flat quasiparticle dispersion and a hidden small energy scale in the 2D t-J model

A model of weakly interacting hole quasiparticles is proposed to describe the normal state of the high temperature superconductors. The effect of strong correlations is contained in the dispersion relation of the holes, which is obtained accurately using a numerical technique and the t-J model on $12\times 12$ clusters. Saddle-points generated by many-body effects induce quasiparticle $flat$ bands similar to those observed in recent angle-resolved photoemission experiments. The near degeneracy between momentum states along the ${\rm X-Y}$ direction is a hidden small energy scale in the problem, which produces a strongly temperature dependent Hall coefficient, as well as a large Fermi surface similar to those observed in the cuprates.

cond-mat↗