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Superconducting dome in ferroelectric-type materials from soft mode instability

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arxiv 2110.08114 v2 pith:RW5DVQ6J submitted 2021-10-15 cond-mat.supr-con cond-mat.mtrl-scicond-mat.othercond-mat.soft

Chandan Setty , Matteo Baggioli , Alessio Zaccone This is my paper · ORCID
classification cond-mat.supr-concond-mat.mtrl-scicond-mat.othercond-mat.soft
keywords modesoftdampingenhancementferroelectric-typematerialsphononsuperconducting
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abstract

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 $T_{c}$ upon approaching the ferroelectric transition from either side is due to the Stokes electron-phonon scattering processes promoted by strong phonon damping effects.

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  1. Understanding the origin of superconducting dome in electron-doped MoS$_2$ monolayer

    cond-mat.supr-con 2024-12 conditional novelty 6.0 of 10

    The superconducting dome in electron-doped MoS2 is recreated from first principles and traced to the 1x1 H to 2x2 charge-density-wave transition and later structural phases.

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