Phonon softening and superconductivity triggered by spin-orbit coupling in simple-cubicα-polonium crystals
نویسندگان
چکیده
منابع مشابه
Softening of roton and phonon modes in a Bose-Einstein condensate with spin-orbit coupling.
Roton-type excitations usually emerge from strong correlations or long-range interactions, as in superfluid helium or dipolar ultracold atoms. However, in a weakly short-range interacting quantum gas, the recently synthesized spin-orbit (SO) coupling can lead to various unconventional phases of superfluidity and give rise to an excitation spectrum of roton-maxon character. Using Bragg spectrosc...
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Superconductivity and spin-orbit (SO) interaction have been two separate emerging fields until very recently that the correlation between them seemed to be observed. However, previous experiments concerning SO coupling are performed far beyond the superconducting state and thus a direct demonstration of how SO coupling affects superconductivity remains elusive. Here we investigate the SO coupli...
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The phonon dispersion and the electron-phonon interaction for the β-Po and the bcc high pressure phases of tellurium are computed with densityfunctional perturbation theory. Our calculations reproduce and explain the experimentally observed pressure dependence of the superconducting critical temperature (Tc) and confirm the connection between the jump in Tc and the structural phase transition. ...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2012
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.86.054115