2018年5月22日
Thermal algebraic-decay charge liquid driven by competing short-range Coulomb repulsion
Physical Review B
- ,
- ,
- 巻
- 97
- 号
- 20
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevB.97.205125
- 出版者・発行元
- American Physical Society
We explore the possibility of a Berezinskii-Kosterlitz-Thouless-like critical phase for the charge degrees of freedom in the intermediateerature 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 Z6 anisotropy. Based on the results, we discuss possible conditions for the critical phase in materials.
- リンク情報
- ID情報
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- DOI : 10.1103/PhysRevB.97.205125
- ISSN : 2469-9969
- ISSN : 2469-9950
- SCOPUS ID : 85047450067
- Web of Science ID : WOS:000433026700002