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Title: Superconducting dome in ferroelectric-type materials from soft mode instability

Journal Article · · Physical Review. B

Here we present a minimal theory of superconductivity enhancement in ferroelectric-type materials. Simple expressions for the optical mode responsible for the soft mode transition are assumed. A key role is played by the anharmonic phonon damping which is modulated by an external control parameter (electron doping or mechanical strain) causing the appearance of the soft mode. It is shown that the enhancement in the superconducting critical temperature Tc upon approaching the ferroelectric transition from either side is due to the Stokes electron-phonon scattering processes promoted by strong phonon damping effects.

Research Organization:
University of Florida, Gainesville, FL (United States)
Sponsoring Organization:
Army Research Laboratory; Army Research Office (ARO); Shanghai Municipal Science and Technology; USDOE Office of Science (SC)
Grant/Contract Number:
FG02-05ER46236
OSTI ID:
1979774
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 2 Vol. 105; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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