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Proceedings Paper

Large bipolarons and oxide superconductivity
Author(s): David Emin
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Paper Abstract

Large-bipolaron superconductivity is plausible with carrier densities well below those of conventional metals. Bipolarons form when carriers self-trap in pairs. Coherently moving large-bipolarons require extremely large ratios of static to optical dielectric-constants. The mutual Coulomb repulsion of a planar large-bipolaron’s paired carriers drives it to a four-lobed shape. A phonon-mediated attraction among large-bipolarons propels their condensation into a liquid. This liquid’s excitations move slowly with a huge effective mass. Excitations’ concomitant weak scattering by phonons produces a moderate low-temperature dc resistivity that increases linearly with rising temperature. With falling temperature an energy gap opens between large-bipolarons’ excitations and those of their self-trapped electronic carriers.

Paper Details

Date Published: 28 February 2017
PDF: 16 pages
Proc. SPIE 10105, Oxide-based Materials and Devices VIII, 1010505 (28 February 2017); doi: 10.1117/12.2261717
Show Author Affiliations
David Emin, The Univ. of New Mexico (United States)

Published in SPIE Proceedings Vol. 10105:
Oxide-based Materials and Devices VIII
Ferechteh H. Teherani; David C. Look; David J. Rogers, Editor(s)

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