Enhanced electron–phonon coupling near an electronic quantum phase transition

  title={Enhanced electron–phonon coupling near an electronic quantum phase transition},
  author={Nikitas I. Gidopoulos},
  journal={Journal of Physics: Condensed Matter},
  • N. Gidopoulos
  • Published 3 October 2021
  • Physics
  • Journal of Physics: Condensed Matter
I construct a simple model to demonstrate that when the many-electron quantum state of a material is near a quantum phase transition and the vibrational motion of a phonon explores the potential energy surface near the transition point, then an impenetrable barrier appears at the potential energy surface which restricts the phonon from crossing the transition point and abnormally increases the phonon frequency. The ensuing anomalous enhancement of the electron phonon coupling is general and… 


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