Superconducting and Ferromagnetic Phases in SrTiO3/LaAlO3 Oxide Interface Structures: Possibility of Finite Momentum Pairing
Karen Michaeli, Andrew C. Potter, Patrick A. Lee
DOI 10.1103/PhysRevLett.108.117003 · Physical Review Letters
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
We introduce a model to explain the observed ferromagnetism and superconductivity in LAO/STO oxide interface structures. Because of the polar catastrophe mechanism, 1/2 charge per unit cell is transferred to the interface layer. We argue that this charge localizes and orders ferromagnetically via exchange with the conduction electrons. Ordinarily, this ferromagnetism would destroy superconductivity, but, due to strong spin-orbit coupling near the interface, the magnetism and superconductivity can coexist by forming a Fulde-Ferrell-Larkin-Ovchinikov-type condensate of Cooper pairs at finite momentum, which is surprisingly robust in the presence of strong disorder.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| SrTiO3/LaAlO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.3 | Pressure not reported | unknown |
Similar papers
Magnetic and superconducting phases at the LaAlO3/SrTiO3 interface: The role of interfacial Ti 3d electrons
similarity 0.97N. Pavlenko et al.
Source status unknown — claims are unverified
Impact of spin-orbit interaction on the phase diagram and anisotropy of the in-plane critical magnetic field at the superconducting LaAlO3/SrTiO3 interface
similarity 0.96P. Wójcik et al.
Source status unknown — claims are unverified
Linear temperature dependence of the upper critical field across the dome of the LaAlO3−SrTiO3 interface superconductor
similarity 0.95L. Kuerten et al.
Source status unknown — claims are unverified
Electrically controlled superconducting states at the heterointerface SrTiO3/LaAlO3
similarity 0.95Keiji Yada et al.
Source status unknown — claims are unverified
Local electronic structure of the superconducting interface LaAlO3/SrTiO3
similarity 0.95Bin Liu & Xiao Hu
Source status unknown — claims are unverified
Two-band superconductivity in doped SrTiO3 films and interfaces
similarity 0.95R. M. Fernandes et al.
Source status unknown — claims are unverified