Fermiology and superconductivity of topological surface states in PdTe2
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Date
09/04/2018Author
Grant ID
EP/M023427/1
EP/I031014/1
EP/L015110/1
2016-006
PLP-2015-144
Metadata
Show full item recordAbstract
We study the low-energy surface electronic structure of the transition-metal dichalcogenide superconductor PdTe2 by spin- and angle-resolved photoemission, scanning tunneling microscopy, and density-functional theory-based supercell calculations. Comparing PdTe2 with its sister compound PtSe2, we demonstrate how enhanced interlayer hopping in the Te-based material drives a band inversion within the antibonding p -orbital manifold well above the Fermi level. We show how this mediates spin-polarized topological surface states which form rich multivalley Fermi surfaces with complex spin textures. Scanning tunneling spectroscopy reveals type-II superconductivity at the surface, and moreover shows no evidence for an unconventional component of its superconducting order parameter, despite the presence of topological surface states.
Citation
Clark , O J , Neat , M J , Okawa , K , Bawden , L , Marković , I , Mazzola , F , Feng , J , Sunko , V , Riley , J M , Meevasana , W , Fujii , J , Vobornik , I , Kim , T , Hoesch , M , Sasagawa , T , Wahl , P , Bahramy , M S & King , P D C 2018 , ' Fermiology and superconductivity of topological surface states in PdTe 2 ' , Physical Review Letters , vol. 120 , no. 15 , 156401 . https://doi.org/10.1103/PhysRevLett.120.156401
Publication
Physical Review Letters
Status
Peer reviewed
ISSN
0031-9007Type
Journal article
Rights
© 2018, American Physical Society. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1103/PhysRevLett.120.156401
Description
We gratefully acknowledge support from the Leverhulme Trust, the Engineering and Physical Sciences Research Council, UK (Grant Nos. EP/M023427/1 and EP/I031014/1), the Royal Society. JC, MJN, LB, VS, and JMR acknowledge EPSRC for PhD studentship support through grant Nos. EP/K503162/1, EP/G03673X/1, EP/L505079/1, and EP/L015110/1.Collections
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