Unconventional superconductivity in the nickel chalcogenide superconductor TlNi2Se2
(2020) In Physical Review B 101(13).- Abstract
- 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
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https://lup.lub.lu.se/record/5becce95-a26b-45fd-a361-c675c9f94494
- author
- organization
- publishing date
- 2020-04-29
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review B
- volume
- 101
- issue
- 13
- article number
- 134523
- publisher
- American Physical Society
- external identifiers
-
- scopus:85084931630
- ISSN
- 2469-9950
- DOI
- 10.1103/PhysRevB.101.134523
- language
- English
- LU publication?
- yes
- id
- 5becce95-a26b-45fd-a361-c675c9f94494
- date added to LUP
- 2020-05-05 10:19:26
- date last changed
- 2022-04-18 22:12:04
@article{5becce95-a26b-45fd-a361-c675c9f94494, abstract = {{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}}, author = {{Jellyman, E. and Jefferies, P. and Pollard, S. and Forgan, E. M. and Blackburn, E. and Campillo, E. and Holmes, A. T. and Cubitt, R. and Gavilano, J. and Wang, Hangdong and Du, Jianhua and Fang, Minghu}}, issn = {{2469-9950}}, language = {{eng}}, month = {{04}}, number = {{13}}, publisher = {{American Physical Society}}, series = {{Physical Review B}}, title = {{Unconventional superconductivity in the nickel chalcogenide superconductor TlNi2Se2}}, url = {{http://dx.doi.org/10.1103/PhysRevB.101.134523}}, doi = {{10.1103/PhysRevB.101.134523}}, volume = {{101}}, year = {{2020}}, }