The fate of interaction-driven topological insulators under disorder

Autor:	Wang, Jing, Ortix, Carmine, Brink, Jeroen van den, Efremov, Dmitry V.
Rok vydání:	2017
Předmět:	Condensed Matter - Strongly Correlated Electrons Condensed Matter - Mesoscale and Nanoscale Physics
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.96.201104
Popis:	We analyze the effect of disorder on the weak-coupling instabilities of quadratic band crossing point (QBCP) in two-dimensional Fermi systems, which, in the clean limit, display interaction- driven topological insulating phases. In the framework of a renormalization group procedure, which treats fermionic interactions and disorder on the same footing, we test all possible instabilities and identify the corresponding ordered phases in the presence of disorder for both single-valley and two-valley QBCP systems. We find that disorder generally suppresses the critical temperature at which the interaction-driven topologically non-trivial order sets in. Strong disorder can also cause a topological phase transition into a topologically trivial insulating state. Comment: 16 pages, 17 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1710.09632 Zobrazit plný text záznamu View this record from Arxiv