Influence of long-range interactions on charge ordering phenomena on a square lattice

Autor:	Rademaker, Louk, Pramudya, Yohanes, Zaanen, Jan, Dobrosavljevic, Vladimir
Rok vydání:	2013
Předmět:	Condensed Matter - Statistical Mechanics Condensed Matter - Quantum Gases Condensed Matter - Strongly Correlated Electrons
Zdroj:	Phys. Rev. E 88, 032121 (2013)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevE.88.032121
Popis:	Usually complex charge ordering phenomena arise due to competing interactions. We have studied how such ordered patterns emerge from the frustration of a long-ranged interaction on a lattice. Using the lattice gas model on a square lattice with fixed particle density, we have identified several interesting phases; such as a generalization of Wigner crystals at low particle densities and stripe phases at densities in between rho = 1/3 and rho = 1/2. These stripes act as domain walls in the checkerboard phase present at half-filling. The phases are characterised at zero temperatures using numerical simulations, and mean field theory is used to construct a finite temperature phase diagram. Comment: 8 pages, 8 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1306.4765 Zobrazit plný text záznamu View this record from Arxiv