Thermal algebraic-decay charge liquid driven by competing short-range Coulomb repulsion

Autor:	Kaneko, Ryui, Nonomura, Yoshihiko, Kohno, Masanori
Rok vydání:	2018
Předmět:	Condensed Matter - Strongly Correlated Electrons Condensed Matter - Materials Science Condensed Matter - Statistical Mechanics
Zdroj:	Phys. Rev. B 97, 205125 (2018)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.97.205125
Popis:	We explore the possibility of a Berezinskii-Kosterlitz-Thouless-like critical phase for the charge degrees of freedom in the intermediate-temperature regime between the charge-ordered and disordered phases in two-dimensional systems with competing short-range Coulomb repulsion. As the simplest example, we investigate the extended Hubbard model with on-site and nearest-neighbor Coulomb interactions on a triangular lattice at half filling in the atomic limit by using a classical Monte Carlo method, and find a critical phase, characterized by algebraic decay of the charge correlation function, belonging to the universality class of the two-dimensional XY model with a $\mathbb{Z}_6$ anisotropy. Based on the results, we discuss possible conditions for the critical phase in materials. Comment: 10 pages, 10 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1802.08538 Zobrazit plný text záznamu View this record from Arxiv