2021 年 31 巻 4 号 p. 236-244
Recent invention of uniaxial-strain application devices using piezo-electric stacks triggered various innovations in condensed-matter physics, providing a unique tool to directly control in situ the crystalline symmetry. In this review, we describe features and usage of piezo-based uniaxial strain devices. We also explain our recent study on the uniaxial-strain study on nematic superconductivity, liquid-crystal-like superconductivity, which was recently found in doped Bi2Se3 superconductors. By applying 1% compressive in-plane strain to Sr-doped Bi2Se3, the configuration of nematic superconducting domains has been successfully controlled.
