Topological Fermi Liquids from Coulomb Interactions in the Doped Honeycomb Lattice

• Type: Article in International Scientific Journal
• Date: 2011

Authors

Eduardo V Castro (Author) Other; Grushin, AG (Author) Other; Valenzuela, B (Author) Other; Vozmediano, MAH (Author) Other; Cortijo, A (Author) Other; de Juan, F (Author) Other

Journal

Title: Physical Review Letters

Vol. 107

ISSN: 0031-9007

Publisher: American Physical Society

Indexing

ISI Web of Knowledge - 49 Citations

Scopus - 49 Citations

Other information

Authenticus ID: P-008-TVT

DOI: 10.1103/physrevlett.107.106402

Abstract (EN): We propose a simple method for obtaining time reversal symmetry (T) broken phases in simple lattice models based on enlarging the unit cell. As an example we study the honeycomb lattice with nearest neighbor hopping and a local nearest neighbor Coulomb interaction V. We show that when the unit cell is enlarged to host six atoms that permits Kekule distortions, self-consistent currents spontaneously form creating nontrivial magnetic configurations with total zero flux at high electron densities. A very rich phase diagram is obtained within a variational mean field approach that includes metallic phases with broken time reversal symmetry (T). The predominant (T) breaking configuration is an anomalous Hall phase, a realization of a topological Fermi liquid.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4