Intrinsic Spin-Orbit Coupling in Superconducting Delta-Doped SrTiO3 Heterostructures

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We report the violation of the Pauli limit due to intrinsic spin-orbit coupling in SrTiO{sub 3} heterostructures. Via selective doping down to a few nanometers, a two-dimensional superconductor is formed, geometrically suppressing orbital pair-breaking. The spin-orbit scattering is exposed by the robust in-plane superconducting upper critical field, exceeding the Pauli limit by a factor of 4. Transport scattering times several orders of magnitude higher than for conventional thin film superconductors enables a new regime to be entered, where spin-orbit coupling effects arise non-perturbatively.

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Bell, Christopher August 19, 2011.

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We report the violation of the Pauli limit due to intrinsic spin-orbit coupling in SrTiO{sub 3} heterostructures. Via selective doping down to a few nanometers, a two-dimensional superconductor is formed, geometrically suppressing orbital pair-breaking. The spin-orbit scattering is exposed by the robust in-plane superconducting upper critical field, exceeding the Pauli limit by a factor of 4. Transport scattering times several orders of magnitude higher than for conventional thin film superconductors enables a new regime to be entered, where spin-orbit coupling effects arise non-perturbatively.

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  • Journal Name: Submitted to Physical Review Letters

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  • Report No.: SLAC-PUB-14501
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 1022457
  • Archival Resource Key: ark:/67531/metadc833524

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  • August 19, 2011

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  • May 19, 2016, 3:16 p.m.

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  • Dec. 5, 2016, 9:28 p.m.

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Bell, Christopher. Intrinsic Spin-Orbit Coupling in Superconducting Delta-Doped SrTiO3 Heterostructures, article, August 19, 2011; United States. (digital.library.unt.edu/ark:/67531/metadc833524/: accessed September 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.