Temperature-Driven Gapless Topological Insulator

• Type: Article in International Scientific Journal
• Date: 2019

Authors

Goncalves, M (Author) Other; Ribeiro, P (Author) Other; Mondaini, R (Author) Other; Eduardo V Castro (Author) FCUP

Journal

Title: Physical Review Letters

Vol. 122

ISSN: 0031-9007

Publisher: American Physical Society

Indexing

ISI Web of Knowledge - 8 Citations

Scopus - 10 Citations

Other information

Authenticus ID: P-00Q-DGR

DOI: 10.1103/physrevlett.122.126601

Abstract (EN): We investigate the phase diagram of the Haldane-Falicov-Kimball model-a model combining topology, interactions, and spontaneous disorder at finite temperatures. Using an unbiased numerical method, we map out the phase diagram on the interaction-temperature plane. Along with known phases, we unveil an insulating charge ordered state with gapless excitations and a temperature-driven gapless topological insulating phase. Intrinsic-temperature-generated-disorder is the key ingredient explaining the unexpected behavior. Our findings support the possibility of having temperature-driven topological transitions into gapped and gapless topological insulating phases in mass unbalanced systems with two fermionic species.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6