@article{c1f621f38782460e92915a1cf5a49442,
title = "Observation of Dirac-like energy band and unusual spectral line shape in quasi-one-dimensional superconductor Tl2Mo6Se6",
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.",
author = "Kosuke Nakayama and Zhiwei Wang and Trang, {Chi Xuan} and Seigo Souma and Rienks, {Emile D.L.} and Takashi Takahashi and Yoichi Ando and Takafumi Sato",
note = "Funding Information: We thank the Helmholtz-Zentrum Berlin for the allocation of synchrotron radiation beamtime. This work was supported by Grant-in-Aid for Scientific Research on Innovative Areas “Topological Materials Science” (JSPS KAKENHI No. JP15H05853), Grant-in-Aid for Scientific Research (JSPS Funding Information: KAKENHI No. JP17H04847, No. JP17H01139, and No. JP15H02105), the Program for Key Interdisciplinary Research of the Tohoku University, and by DFG (CRC1238 “Control and Dynamics of Quantum Materials,” Projects A04). Publisher Copyright: {\textcopyright} 2018 American Physical Society.",
year = "2018",
month = oct,
day = "10",
doi = "10.1103/PhysRevB.98.140502",
language = "English",
volume = "98",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "14",
}