Sato, Takafumi ORCID: 0000-0002-4544-5463, Wang, Zhiwei ORCID: 0000-0003-0182-2471, Nakayama, Kosuke, Souma, Seigo, Takane, Daichi, Nakata, Yuki, Iwasawa, Hideaki ORCID: 0000-0001-6760-4085, Cacho, Cephise ORCID: 0000-0002-0058-5817, Kim, Timur ORCID: 0000-0003-4201-4462, Takahashi, Takashi and Ando, Yoichi ORCID: 0000-0002-3553-3355 (2018). Observation of band crossings protected by nonsymmorphic symmetry in the layered ternary telluride Ta3SiTe6. Phys. Rev. B, 98 (12). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

We have performed angle-resolved photoemission spectroscopy of the layered ternary telluride Ta3SiTe6 which is predicted to host nodal lines associated with nonsymmorphic crystal symmetry. We found that the energy bands in the valence-band region show Dirac-like dispersions which present a band degeneracy at the R point of the bulk orthorhombic Brillouin zone. This band degeneracy extends one dimensionally along the whole SR high-symmetry line, forming nodal lines protected by the glide mirror symmetry of the crystal. We also observed a small band splitting near E-F which supports the existence of hourglass-type dispersions predicted by the calculation. The present results provide an excellent opportunity to investigate the interplay between exotic nodal fermions and nonsymmorphic crystal symmetry.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Sato, TakafumiUNSPECIFIEDorcid.org/0000-0002-4544-5463UNSPECIFIED
Wang, ZhiweiUNSPECIFIEDorcid.org/0000-0003-0182-2471UNSPECIFIED
Nakayama, KosukeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Souma, SeigoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Takane, DaichiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nakata, YukiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Iwasawa, HideakiUNSPECIFIEDorcid.org/0000-0001-6760-4085UNSPECIFIED
Cacho, CephiseUNSPECIFIEDorcid.org/0000-0002-0058-5817UNSPECIFIED
Kim, TimurUNSPECIFIEDorcid.org/0000-0003-4201-4462UNSPECIFIED
Takahashi, TakashiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ando, YoichiUNSPECIFIEDorcid.org/0000-0002-3553-3355UNSPECIFIED
URN: urn:nbn:de:hbz:38-172467
DOI: 10.1103/PhysRevB.98.121111
Journal or Publication Title: Phys. Rev. B
Volume: 98
Number: 12
Date: 2018
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 2469-9969
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
TOPOLOGICAL CRYSTALLINE INSULATOR; DIRAC SEMIMETAL; MAGNETORESISTANCE; DISCOVERY; FERMIONSMultiple languages
Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed MatterMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/17246

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