Multiband superconductivity and nanoscale inhomogeneity at oxide interfaces
S. Caprara, J. Biscaras, N. Bergeal, D. Bucheli, S. Hurand, C. Feuillet-Palma, A. Rastogi, R. C. Budhani, J. Lesueur, M. Grilli
DOI 10.1103/PhysRevB.88.020504 · 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
The two-dimensional electron gas at the LaTiO3/SrTiO3 or LaAlO3/SrTiO3 oxide interfaces becomes superconducting when the carrier density is tuned by gating. The measured resistance and superfluid density reveal an inhomogeneous superconductivity resulting from percolation of filamentary structures of superconducting “puddles” with randomly distributed critical temperatures, embedded in a nonsuperconducting matrix. Following the evidence that superconductivity is related to the appearance of high-mobility carriers, we model intrapuddle superconductivity by a multiband system within a weak coupling BCS scheme. The microscopic parameters, extracted by fitting the transport data with a percolative model, yield a consistent description of the dependence of the average intrapuddle critical temperature and superfluid density on the carrier density.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LaTiO3/SrTiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| LaAlO3/SrTiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Two-gap s±-wave superconductivity at an oxide interface
similarity 0.95G. Singh et al.
Source status unknown — claims are unverified
Magnetic field tuned superconductor-to-insulator transition at the LaAlO3/SrTiO3 interface
similarity 0.94M. M. Mehta et al.
Source status unknown — claims are unverified
Evolution of topological superconductivity by orbital-selective confinement in oxide nanowires
similarity 0.93C. A. Perroni et al.
Source status unknown — claims are unverified
Tunneling spectroscopy and Majorana modes emergent from topological gapless phases in high-Tc cuprate superconductors
similarity 0.91Jun-Ting Kao et al.
Source status unknown — claims are unverified
Modulation of the superconducting critical temperature due to quantum confinement at the LaAlO3/SrTiO3 interface
similarity 0.91D. Valentinis et al.
Source status unknown — claims are unverified
Model for Magnetic Flux Patterns Induced by the Influence of In-Plane Magnetic Fields on Spatially Inhomogeneous Superconducting Interfaces of LaAlO3−SrTiO3 Bilayers
similarity 0.91Kazushi Aoyama & Manfred Sigrist
Source status unknown — claims are unverified