Possible signatures of mixed-parity superconductivity in doped polar SrTiO3 films
Timo Schumann, Luca Galletti, Hanbyeol Jeong, Kaveh Ahadi, William M. Strickland, Salva Salmani-Rezaie, Susanne Stemmer
DOI 10.1103/PhysRevB.101.100503 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Superconductors that possess both broken spatial inversion symmetry and spin-orbit interactions exhibit a mix of spin singlet and triplet pairing. Here, 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. Moreover, 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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| SrTiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.3 | Pressure not reported | unknown |
| SrTiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.6 | Pressure not reported | onset |
Similar papers
Possible signatures of mixed-parity superconductivity in doped polar SrTiO3 films
similarity 1.00Timo Schumann et al. · 2020 · arXiv:2003.10586
Source status unknown — claims are unverified
Role of locally polar regions in the superconductivity of SrTiO3
similarity 0.96Salva Salmani-Rezaie et al.
Source status unknown — claims are unverified
Critical Doping for the Onset of a Two-Band Superconducting Ground State in SrTiO3−δ
similarity 0.95Xiao Lin et al.
Source status unknown — claims are unverified
Tunable coupling of two-dimensional superconductors in bilayer SrTiO3 heterostructures
similarity 0.95Hisashi Inoue et al.
Source status unknown — claims are unverified
Anomalous superconducting diode effect in a polar superconductor
similarity 0.95Robert Kealhofer et al.
Source status unknown — claims are unverified
Intrinsic spin-orbit coupling in superconducting δ-doped SrTiO3 heterostructures
similarity 0.95M. Kim et al.
Source status unknown — claims are unverified