Fermiology and superconductivity of topological surface states in PdTe2

O. J. Clark; M. J. Neat; K. Okawa; Lewis Bawden; Igor Marković; Federico Mazzola; Jiagui Feng; Veronika Sunko; J. M. Riley; W. Meevasana; J. Fujii; I Vobornik; T. 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, Lewis Bawden, Igor Marković, Federico Mazzola, Jiagui Feng, Veronika Sunko, J. M. Riley, W. Meevasana, J. Fujii, I Vobornik, T. Kim, M. Hoesch, T. Sasagawa, P. Wahl, M.S. Bahramy, P. D. C. King

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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.

Original language	English
Article number	156401
Number of pages	7
Journal	Physical Review Letters
Volume	120
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.120.156401
Publication status	Published - 9 Apr 2018

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10.1103/PhysRevLett.120.156401

Fermiology_ACCEPTED
© 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
Accepted author manuscript, 10.7 MB

Engineered Quantum States: Engineered quantum states via atmoic-scale assembly of artificial 2D heterostructures
King, P. (PI)
The Leverhulme Trust
1/08/17 → 31/07/22
Project: Standard
Philip Leverhulme Prize Award: Philip Leverhulme Prize Nomination
King, P. (PI)
The Leverhulme Trust
1/08/16 → 31/07/19
Project: Standard
Engineering and Imaging Enhanced: Engineering and imaging enhamced spin splittings in solids
King, P. (PI)
EPSRC
1/07/15 → 30/09/17
Project: Standard

Peter Wahl
- gpw2st-andrews.acuk
- School of Physics and Astronomy - Professor, Director of Research
- Centre for Designer Quantum Materials
- Condensed Matter Physics
Person: Academic

Spin- and angle-resolved photoemission study of topological band inversions within a single orbital manifold (Thesis dataset)
Clark, O. J. (Creator) & King, P. D. (Supervisor), University of St Andrews, 2021
DOI: 10.17630/eed8dad8-836b-40e7-8e57-89c8dabed070, http://hdl.handle.net/10023/17458
Dataset: Thesis dataset

File
Fermiology and superconductivity of topological surface states in PdTe2 (dataset)
Clark, O. J. (Creator), Neat, M. J. (Creator), okawa, K. (Creator), Bawden, L. (Creator), Markovic, I. (Creator), Mazzola, F. (Creator), Feng, J. (Creator), Sunko, V. (Creator), Riley, J. M. (Creator), meevasana, W. (Creator), fujii, J. (Creator), vobornik, I. (Creator), kim, T. (Creator), hoesch, M. (Creator), sasagawa, T. (Creator), Wahl, G. P. (Creator), bahramy, M. (Creator) & King, P. D. (Creator), University of St Andrews, 16 Apr 2018
DOI: 10.17630/f542f28a-e0c6-4299-abdd-42d388471513
Dataset

File

Cite this

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 PdTe₂. Physical Review Letters, 120(15), Article 156401. https://doi.org/10.1103/PhysRevLett.120.156401

@article{3290fc8c7d5c4b2882c1cef0d67c64fb,

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 Lewis Bawden and Igor Markovi{\'c} and Federico Mazzola and Jiagui Feng and Veronika Sunko and Riley, {J. M.} and W. Meevasana and J. Fujii and I Vobornik and T. Kim and M. Hoesch and T. Sasagawa and P. Wahl and M.S. Bahramy and King, {P. D. C.}",

note = "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.",

year = "2018",

month = apr,

day = "9",

doi = "10.1103/PhysRevLett.120.156401",

language = "English",

volume = "120",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "15",

}

Clark, OJ, Neat, MJ, Okawa, K, Bawden, L, Marković, I, Mazzola, F, Feng, J, Sunko, V, Riley, JM, Meevasana, W, Fujii, J, Vobornik, I, Kim, T, Hoesch, M, Sasagawa, T, Wahl, P, Bahramy, MS & King, PDC 2018, 'Fermiology and superconductivity of topological surface states in PdTe₂', Physical Review Letters, vol. 120, no. 15, 156401. https://doi.org/10.1103/PhysRevLett.120.156401

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, Lewis

AU - Marković, Igor

AU - Mazzola, Federico

AU - Feng, Jiagui

AU - Sunko, Veronika

AU - Riley, J. M.

AU - Meevasana, W.

AU - Fujii, J.

AU - Vobornik, I

AU - Kim, T.

AU - Hoesch, M.

AU - Sasagawa, T.

AU - Wahl, P.

AU - Bahramy, M.S.

AU - King, P. D. C.

N1 - 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.

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

VL - 120

JO - Physical Review Letters

JF - Physical Review Letters

IS - 15

M1 - 156401

ER -

Fermiology and superconductivity of topological surface states in PdTe2

Abstract

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Projects

Engineered Quantum States: Engineered quantum states via atmoic-scale assembly of artificial 2D heterostructures

Philip Leverhulme Prize Award: Philip Leverhulme Prize Nomination

Engineering and Imaging Enhanced: Engineering and imaging enhamced spin splittings in solids

Profiles

Peter Wahl

Datasets

Spin- and angle-resolved photoemission study of topological band inversions within a single orbital manifold (Thesis dataset)

Fermiology and superconductivity of topological surface states in PdTe2 (dataset)

Cite this

Fermiology and superconductivity of topological surface states in PdTe₂