特集：高圧力で拓くトポロジカル物質の新規物性
高圧力を用いたトポロジカル量子物質の物性研究
キーワード:
topological quantum materials,
trivial-nontrivial transition,
superconductivity,
transport property,
structural analysis
2020 年 30 巻 4 号 p. 281-289
詳細
2020 年 30 巻 4 号 p. 281-289
In this article, the effects of pressure on topological quantum materials, a polar semiconductor BiTeBr and a type-II Dirac semimetal PdTe2, are reviewed. The first topic is the pressure-induced trivial-nontrivial electronic transition in BiTeBr. I explain that the topological transition was clearly revealed by the Wilson-loop analysis used for evaluating topological Z2 invariants. The second topic is the introduction of superconducting properties of PdTe2 under multi-extreme conditions. I report an unusual superconducting phase diagram in addition to experimental results of electrical resistivity and ac-susceptibility in PdTe2.
