Superconducting Tunneling Spectroscopy of Spin-Orbit Coupling and Orbital Depairing in Nb:SrTiO_{3}.

@article{Swartz2018SuperconductingTS,
  title={Superconducting Tunneling Spectroscopy of Spin-Orbit Coupling and Orbital Depairing in Nb:SrTiO\_\{3\}.},
  author={Adrian G. Swartz and Alfred K. C. Cheung and Hyeok Yoon and Zhuoyu Chen and Yasuyuki Hikita and Srinivas Raghu and Harold Y. Hwang},
  journal={Physical review letters},
  year={2018},
  volume={121 16},
  pages={
          167003
        }
}
We have examined the intrinsic spin-orbit coupling and orbital depairing in thin films of Nb-doped SrTiO_{3} by superconducting tunneling spectroscopy. The orbital depairing is geometrically suppressed in the two-dimensional limit, enabling a quantitative evaluation of the Fermi level spin-orbit scattering using Maki's theory. The response of the superconducting gap under in-plane magnetic fields demonstrates short spin-orbit scattering times τ_{so}≤1.1  ps. Analysis of the orbital depairing… 
6 Citations
Superconductivity in the presence of spin-orbit interactions stabilized by Hund coupling
The intraorbital repulsive Hubbard interaction cannot lead to attractive superconducting pairing states, except through the Kohn-Luttinger mechanism. This situation may change when we include
Anomalies of upper critical field in the spinel superconductor LiTi2O4−δ
High-field electrical transport and point-contact tunneling spectroscopy were used to investigate superconducting properties of the unique spinel oxide, LiTi$_2$O$_{4-\delta}$ films with various
Effects of paramagnetic pair-breaking and spin-orbital coupling on multi-band superconductivity.
TLDR
A model for analyzing the temperature-dependence of the critical field in the presence of orbital, paramagnetic and spin-orbital effects is proposed and found to be in very good agreement with the data.
Universal behavior of the bosonic metallic ground state in a two-dimensional superconductor
Anomalous metallic behavior, marked by a saturating finite resistivity much lower than the Drude estimate, has been observed in a wide range of two-dimensional superconductors. Utilizing the

References

SHOWING 1-10 OF 116 REFERENCES
Link between the Superconducting Dome and Spin-Orbit Interaction in the (111) LaAlO_{3}/SrTiO_{3} Interface.
TLDR
The correlation between the superconductivity and spin-orbit interaction as well as the enhancement of the parallel upper critical field, well beyond the Chandrasekhar-Clogston limit, suggest that super conductivity and the spin- orbit interaction are linked in a nontrivial fashion.
Intrinsic spin-orbit coupling in superconducting delta-doped SrTiO3 heterostructures
We report the violation of the Pauli limit due to intrinsic spin-orbit coupling in SrTiO3 heterostructures. Via selective doping down to a few nanometers, a two-dimensional superconductor is formed,
The role of spin-orbit scattering in high field superconducting tunneling
The observation of the magnetic field splitting of the quasiparticle states in thin superconducting films does make it possible to determine the size of spin-orbit interactions via tunneling
Theory of spin-orbit coupling at LaAlO 3 /SrTiO 3 interfaces and SrTiO 3 surfaces
The theoretical understanding of the spin-orbit coupling (SOC) effects at LaAlO$_{3}$/SrTiO$_{3}$ interfaces and SrTiO$_{3}$ surfaces is still in its infancy. We perform first-principles
Single-Gap Superconductivity and Dome of Superfluid Density in Nb-Doped SrTiO_{3}.
TLDR
SrTiO_{3} exhibits a superconducting dome upon doping with Nb, and T_{c}, 2Δ, and the superfluid density as a function of charge carrier concentration are determined, and all three quantities exhibit the characteristic dome shape.
Engineering two-dimensional superconductivity and Rashba spin–orbit coupling in LaAlO3/SrTiO3 quantum wells by selective orbital occupancy
TLDR
Electrostatic gating experiments in LaAlO3/SrTiO3 wells of different crystal orientations show that the spatial extension and anisotropy of the 2D superconductivity and the Rashba spin–orbit field can be largely modulated by controlling the2DEG sub-band filling.
Derivation of effective spin-orbit Hamiltonians and spin lifetimes with application to SrTiO 3 heterostructures
A general approach is derived for constructing an effective spin-orbit Hamiltonian for nonmagnetic materials, which is useful for calculating spin-dependent properties near an arbitrary point in
Tuning spin-orbit coupling and superconductivity at the SrTiO{3}/LaAlO{3} interface: a magnetotransport study.
TLDR
The spin-orbit coupling energy epsilon{SO} is extracted and used to explain the strong gate dependence of the mobility and of the anomalous Hall signal observed.
Spin proximity effect in ultrathin superconducting Be-Au bilayers.
TLDR
Tilted field measurements showed that, contrary to recent theory, the interface spin-orbit coupling induces a large in-plane superconducting susceptibility but only a very small transverse susceptibility.
Quasiparticle dynamics and spin-orbital texture of the SrTiO3 two-dimensional electron gas.
TLDR
It is demonstrated that angle-resolved photoemission can directly image the quasiparticle dynamics of the d-electron subband ladder of this complex-oxide 2DEG, uncovering how quantum confinement and inversion symmetry breaking collectively tune the delicate interplay of charge, spin, orbital and lattice degrees of freedom in this system.
...
1
2
3
4
5
...