期刊
PHYSICAL REVIEW B
卷 105, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.105.115138
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资金
- MINECO/FEDER, Union Europea [RTI2018-098452-B-I00]
- Maria de Maeztu Program for Units of Excellence in RD [CEX2018-000805-M]
The Mott transition in honeycomb compounds with significant spin-orbit coupling was explored. At finite temperatures, a novel semimetallic phase was identified between a topological insulator and a topological Mott insulator, characterized by gapped spin excitations with nontrivial topological properties.
The Mott transition in honeycomb compounds with significant spin-orbit coupling is explored. At finite temperatures we identify a novel semimetallic phase located between a topological insulator and a topological Mott insulator. This semimetal is characterized by having no charge gap, no quasiparticles, and gapped spin excitations with nontrivial topological properties. While charge conduction is incoherent involving mean-free paths violating the Mott-Ioffe-Regel limit, spin excitations can be transported ballistically along the edges giving rise to a quantized spin conductance. Such bad topological semimetal could be searched for close to the Mott transition in certain twisted bilayers of transition metal dicalchogenides.
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