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Multiband superconductivity due to the electron - LO-phonon interaction in strontium titanate and on a SrTiO3/LaAlO3 interface | | S. N. Klimin
; J. Tempere
; J. T. Devreese
; D. van der Marel
; | | Date: |
2 Jun 2016 | | Abstract: | In strontium titanate, the Froehlich electron - LO-phonon interaction
dominates the electron response and can also provide superconductivity. Because
of high LO-phonon frequencies in SrTiO3, the superconducting system is
non-adiabatic. We demonstrate that the dielectric function approach is an
adequate theoretical method for superconductivity in SrTiO3 and on the
SrTiO3-LaAlO3 interface. The critical temperatures are calculated using
realistic material parameters. The obtained critical temperatures are in line
with experimental data both for bulk and interface superconductivity. The
present method explains the observed multi-dome shape of the critical
temperature in SrTiO3 as a function of the electron concentration due to
multiband superconductivity. | | Source: | arXiv, 1606.0644 | | Services: | Forum | Review | PDF | Favorites | |
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