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Elizabeth Blackburn. Portrait.

Elizabeth Blackburn

Professor

Elizabeth Blackburn. Portrait.

Unconventional superconductivity in the nickel chalcogenide superconductor TlNi2Se2

Author

  • E. Jellyman
  • P. Jefferies
  • S. Pollard
  • E. M. Forgan
  • E. Blackburn
  • E. Campillo
  • A. T. Holmes
  • R. Cubitt
  • J. Gavilano
  • Hangdong Wang
  • Jianhua Du
  • Minghu Fang
Show all

Summary, in English

We present the results of a study of the vortex lattice (VL) of the nickel chalcogenide superconductor TlNi2Se2, using small angle neutron scattering. This superconductor has the same crystal symmetry as the iron arsenide materials. Previous work points to it being a two-gap superconductor, with an unknown pairing mechanism. No structural transitions in the vortex lattice are seen in the phase diagram, arguing against d-wave gap symmetry. Empirical fits of the temperature dependence of the form factor and penetration depth rule out a simple s-wave model, supporting the presence of nodes in the gap function. The variation of the VL opening angle with field is consistent with earlier reports of multiple gaps

Department/s

  • Synchrotron Radiation Research

Publishing year

2020-04-29

Language

English

Publication/Series

Physical Review B

Volume

101

Issue

13

Document type

Journal article

Publisher

American Physical Society

Topic

  • Condensed Matter Physics (including Material Physics, Nano Physics)

Status

Published

ISBN/ISSN/Other

  • ISSN: 2469-9950