Universität zu Köln

Kostylev, Ivan, Yonezawa, Shingo ORCID: 0000-0002-7476-3604, Wang, Zhiwei ORCID: 0000-0003-0182-2471, Ando, Yoichi ORCID: 0000-0002-3553-3355 and Maeno, Yoshiteru (2020). Uniaxial-strain control of nematic superconductivity in SrxBi2Se3. Nat. Commun., 11 (1). LONDON: NATURE PUBLISHING GROUP. ISSN 2041-1723

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Abstract

Nematic states are characterized by rotational symmetry breaking without translational ordering. Recently, nematic superconductivity, in which the superconducting gap spontaneously lifts the rotational symmetry of the lattice, has been discovered. In nematic superconductivity, multiple superconducting domains with different nematic orientations can exist, and these domains can be controlled by a conjugate external stimulus. Domain engineering is quite common in magnets but has not been achieved in superconductors. Here, we report control of the nematic superconductivity and their domains of SrxBi2Se3, through externally-applied uniaxial stress. The suppression of subdomains indicates that it is the Delta (4y) state that is most favoured under compression along the basal Bi-Bi bonds. This fact allows us to determine the coupling parameter between the nematicity and lattice distortion. These results provide an inevitable step towards microscopic understanding and future utilization of the unique topological nematic superconductivity. Nematic superconductors, exhibiting rotational-symmetry breaking, can form domains; a counterpart of common magnetic domains. Here, the authors report control of nematic superconductivity and their domains of SrxBi2Se3 by uniaxial deformation, a step toward superconductive domain engineering.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Kostylev, Ivan UNSPECIFIED UNSPECIFIED UNSPECIFIED Yonezawa, Shingo UNSPECIFIED orcid.org/0000-0002-7476-3604 UNSPECIFIED Wang, Zhiwei UNSPECIFIED orcid.org/0000-0003-0182-2471 UNSPECIFIED Ando, Yoichi UNSPECIFIED orcid.org/0000-0002-3553-3355 UNSPECIFIED Maeno, Yoshiteru UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-322743
DOI:	10.1038/s41467-020-17913-y
Journal or Publication Title:	Nat. Commun.
Volume:	11
Number:	1
Date:	2020
Publisher:	NATURE PUBLISHING GROUP
Place of Publication:	LONDON
ISSN:	2041-1723
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Physics > Institute of Physics II
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language TOPOLOGICAL-INSULATOR; PHASES; ORDER Multiple languages Multidisciplinary Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/32274