Universität zu Köln

Nakayama, Kosuke, Wang, Zhiwei ORCID: 0000-0003-0182-2471, Trang, Chi Xuan, Souma, Seigo, Rienks, Emile D. L., Takahashi, Takashi, Ando, Yoichi ORCID: 0000-0002-3553-3355 and Sato, Takafumi ORCID: 0000-0002-4544-5463 (2018). Observation of Dirac-like energy band and unusual spectral line shape in quasi-one-dimensional superconductor Tl2Mo6Se6. Phys. Rev. B, 98 (14). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

We have performed high-resolution angle-resolved photoemission spectroscopy of the quasi-one-dimensional (1D) topological superconductor candidate Tl2Mo6Se6 consisting of weakly coupled Mo3Se3 chains. We found a quasi-1D Fermi surface arising from a Dirac-like energy band, which is associated with the nonsymmorphic screw symmetry of the chains and predicted to trigger topological superconductivity. We observed a significant spectral-weight reduction over a wide energy range, together with a tiny Fermi-edge structure which exhibits a signature of a superconducting-gap opening below the superconducting-transition temperature. The observed quasi-1D Dirac-like band and its very small density of states point to an unconventional nature of superconductivity in Tl2Mo6Se6.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Nakayama, Kosuke UNSPECIFIED UNSPECIFIED UNSPECIFIED Wang, Zhiwei UNSPECIFIED orcid.org/0000-0003-0182-2471 UNSPECIFIED Trang, Chi Xuan UNSPECIFIED UNSPECIFIED UNSPECIFIED Souma, Seigo UNSPECIFIED UNSPECIFIED UNSPECIFIED Rienks, Emile D. L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Takahashi, Takashi UNSPECIFIED UNSPECIFIED UNSPECIFIED Ando, Yoichi UNSPECIFIED orcid.org/0000-0002-3553-3355 UNSPECIFIED Sato, Takafumi UNSPECIFIED orcid.org/0000-0002-4544-5463 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-169458
DOI:	10.1103/PhysRevB.98.140502
Journal or Publication Title:	Phys. Rev. B
Volume:	98
Number:	14
Date:	2018
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	2469-9969
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 STATE; CUXBI2SE3; FIELD Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/16945