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Title: Possible signatures of mixed-parity superconductivity in doped polar SrTi O 3 films

Journal Article · · Physical Review B

Superconductors that possess both broken spatial inversion symmetry and spin-orbit interactions exhibit a mix of spin singlet and triplet pairing. In this work, we report on measurements of the superconducting properties of electron-doped, strained SrTiO3 films. These films have an enhanced superconducting transition temperature and were previously shown to undergo a transition to a polar phase prior to becoming superconducting.We show that some films show signatures of an unusual superconducting state, such as an in-plane critical field that is higher than both the paramagnetic and orbital pair breaking limits. Furthermore, nonreciprocal transport, which reflects the ratio of odd versus even pairing interactions, is observed. Together, these characteristics indicate that these films provide a tunable platform for investigations of unconventional superconductivity.

Research Organization:
Univ. of California, Santa Barbara, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Science Foundation (NSF)
Grant/Contract Number:
SC0020305; DMR-1720256
OSTI ID:
1605930
Alternate ID(s):
OSTI ID: 1605962
Journal Information:
Physical Review B, Vol. 101, Issue 10; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 28 works
Citation information provided by
Web of Science

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  • Jalan, Bharat; Engel-Herbert, Roman; Wright, Nicholas J.
  • Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, Vol. 27, Issue 3 https://doi.org/10.1116/1.3106610
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