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arXiv · 2009.11511

Magneto-transport properties of tellurium under extreme conditions

Kazuto Akiba·Kaya Kobayashi·Tatsuo C. Kobayashi·Ryo Koezuka·Atsushi Miyake·Jun Gouchi·Yoshiya Uwatoko·Masashi Tokunaga
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Abstract

This study investigates the transport properties of a chiral elemental semiconductor tellurium (Te) under magnetic fields and pressure. Application of hydrostatic pressure reduces the resistivity of Te, while its temperature dependence remains semiconducting up to 4 GPa, contrary to recent theoretical and experimental studies. Application of higher pressure causes structural as well as semiconductor--metal transitions. The resulting metallic phase above 4 GPa exhibits superconductivity at 2 K along with a noticeable linear magnetoresistance effect. On the other hand, at ambient pressure, we identified metallic surface states on the as-cleaved (10$\bar{1}$0) surfaces of Te. The nature of these metallic surface states has been systematically studied by analyzing quantum oscillations observed in high magnetic fields. We clarify that a well-defined metallic surface state exists not only on chemically etched samples that were previously reported, but also on as-cleaved ones.

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Kazuto Akiba, Kaya Kobayashi, Tatsuo C. Kobayashi, Ryo Koezuka, Atsushi Miyake, Jun Gouchi, Yoshiya Uwatoko, Masashi Tokunaga. 2020-09-24. Magneto-transport properties of tellurium under extreme conditions. https://doi.org/10.1103/physrevb.101.245111

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