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
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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