Fermiology and Superconductivity of Topological Surface States in PdTe2

O. J. Clark; M. J. Neat; K. Okawa; L. Bawden; I. Markovic; F. Mazzola; J. Feng; V. Sunko; J. M. Riley; W. Meevasana; J. Fujii; I. Vobornik; T. K. Kim; M. Hoesch; T. Sasagawa; P. Wahl; M. S. Bahramy; P. D. C. King

doi:10.1103/PhysRevLett.120.156401

Fermiology and Superconductivity of Topological Surface States in PdTe2

O. J. Clark, M. J. Neat, K. Okawa, L. Bawden, I. Markovic, F. Mazzola, J. Feng, V. Sunko, J. M. Riley, W. Meevasana, J. Fujii, I. Vobornik, T. K. Kim, M. Hoesch, T. Sasagawa, P. Wahl, M. S. Bahramy, P. D. C. King

Theoretical Physics Group

Research output: Contribution to journal › Article › peer-review

Abstract

We study the low-energy surface electronic structure of the transition-metal dichalcogenide superconductor
PdTe
2
by spin- and angle-resolved photoemission, scanning tunneling microscopy, and density-functional theory-based supercell calculations. Comparing
PdTe
2
with its sister compound
PtSe
2
, 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.

Original language	English
Journal	Physical Review Letters
DOIs	https://doi.org/10.1103/PhysRevLett.120.156401
Publication status	Published - 9 Apr 2018

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Clark, O. J., Neat, M. J., Okawa, K., Bawden, L., Markovic, I., Mazzola, F., Feng, J., Sunko, V., Riley, J. M., Meevasana, W., Fujii, J., Vobornik, I., Kim, T. K., Hoesch, M., Sasagawa, T., Wahl, P., Bahramy, M. S., & King, P. D. C. (2018). Fermiology and Superconductivity of Topological Surface States in PdTe2. Physical Review Letters. https://doi.org/10.1103/PhysRevLett.120.156401

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title = "Fermiology and Superconductivity of Topological Surface States in PdTe2",

abstract = "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.",

author = "Clark, {O. J.} and Neat, {M. J.} and K. Okawa and L. Bawden and I. Markovic and F. Mazzola and J. Feng and V. Sunko and Riley, {J. M.} and W. Meevasana and J. Fujii and I. Vobornik and Kim, {T. K.} and M. Hoesch and T. Sasagawa and P. Wahl and Bahramy, {M. S.} and King, {P. D. C.}",

year = "2018",

month = apr,

day = "9",

doi = "10.1103/PhysRevLett.120.156401",

language = "English",

journal = "Physical Review Letters",

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TY - JOUR

T1 - Fermiology and Superconductivity of Topological Surface States in PdTe2

AU - Clark, O. J.

AU - Neat, M. J.

AU - Okawa, K.

AU - Bawden, L.

AU - Markovic, I.

AU - Mazzola, F.

AU - Feng, J.

AU - Sunko, V.

AU - Riley, J. M.

AU - Meevasana, W.

AU - Fujii, J.

AU - Vobornik, I.

AU - Kim, T. K.

AU - Hoesch, M.

AU - Sasagawa, T.

AU - Wahl, P.

AU - Bahramy, M. S.

AU - King, P. D. C.

PY - 2018/4/9

Y1 - 2018/4/9

N2 - 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.

AB - 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.

U2 - 10.1103/PhysRevLett.120.156401

DO - 10.1103/PhysRevLett.120.156401

M3 - Article

SN - 0031-9007

JO - Physical Review Letters

JF - Physical Review Letters

ER -

Fermiology and Superconductivity of Topological Surface States in PdTe2

Abstract

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