Dresden 2014 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 101: Transport - Poster Session
TT 101.37: Poster
Donnerstag, 3. April 2014, 15:00–19:00, P2
Electronic correlations in bulk Bi-chalcogenide topological insulators and elemental bismuth — •Luis Craco1 and Stefano Leoni2 — 1Instituto de Fisica, Universidade Federal de Mato Grosso, 78060-900, Cuiaba, MT, Brazil — 2School of Chemistry, Cardiff University, Cardiff, CF10 3AT, UK
In recent years three-dimensional (3D) topological insulators (TIs)
have attracted great fundamental interest as systems that can lead
to new phases of quantum matter. Theoretical and experimental work
have revealed that intrinsic spin-orbit (SO) coupling can drive
qualitative new effects on the electronic structure of
Bi-chalcogenide p-band systems in general. In this poster, we
present our recent work on electronic structure and transport
properties of bulk Bi2Se3 [1] and Bi2Te2Se [2] TIs.
We will also revisit the long-standing issues of transport and
magnetoresistance responses in elemental bismuth [3]. Basing
ourselves on LDA+DMFT calculations we show that the interplay
between SO and multi-orbital Coulomb interactions has quantitative
new effects in their semimetal electronic structure. We show,
for example, why the intricate interplay between local Coulomb
and SO interaction promotes a spin-orbit Kondo state in elemental
bismuth. Taken together our work represents a realization of complex
dynamical correlation effects in p-band semimetals and in bulk
Bi-chalcogenide TIs.
L. Craco and S. Leoni, Phys. Rev. B 85, 075114 (2012)
L. Craco and S. Leoni, Phys. Rev. B 85, 195124 (2012)
L. Craco and S. Leoni, in preparation