2019
DOI: 10.1103/physrevb.99.161121
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Large positive magnetoconductivity at microwave frequencies in the compensated topological insulator BiSbTeSe2

Abstract: The bulk electronic properties of compensated topological insulators are strongly affected by the self-organized formation of charge puddles at low temperature, but their response in the microwave frequency range is little studied. We employed broadband impedance spectroscopy up to 5 GHz to address the ac transport properties of well-compensated BiSbTeSe2, where charge puddles are known to form as metallic entities embedded in an insulating host. It turns out that the average puddle size sets the characteristi… Show more

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Cited by 5 publications
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“…Therefore, bulkinsulating TIs with high resistivity are still required to extend the topological states to the high temperature region. A good example of a wide-gap TI system is Bi2-xSbxTe3-ySey (BSTS) 10,11,[20][21][22][23] , which shows surface states that dominate the transport behavior at and below 30 K 10 . Since in bulk-insulating TIs, the Fermi surface is formed by pure Dirac dispersed surface states, the Shubnikov-de Haas (SdH) oscillations are strong evidence that can be used to evaluate the contribution of surface states.…”
Section: Introductionmentioning
confidence: 99%
“…Therefore, bulkinsulating TIs with high resistivity are still required to extend the topological states to the high temperature region. A good example of a wide-gap TI system is Bi2-xSbxTe3-ySey (BSTS) 10,11,[20][21][22][23] , which shows surface states that dominate the transport behavior at and below 30 K 10 . Since in bulk-insulating TIs, the Fermi surface is formed by pure Dirac dispersed surface states, the Shubnikov-de Haas (SdH) oscillations are strong evidence that can be used to evaluate the contribution of surface states.…”
Section: Introductionmentioning
confidence: 99%