Constraining Forces Stabilizing Superconductivity in Bismuth
Institut für Materialwissenschaft, Materialphysik, Universität Stuttgart, D-70569 Stuttgart, Germany
Symmetry 2018, 10(2), 44; https://doi.org/10.3390/sym10020044
Received: 14 November 2017 / Revised: 6 February 2018 / Accepted: 8 February 2018 / Published: 12 February 2018
As shown in former papers, the nonadiabatic Heisenberg model presents a mechanism of Cooper pair formation generated by the strongly correlated atomic-like motion of the electrons in narrow, roughly half-filled “superconducting bands” of special symmetry. The formation of Cooper pairs is not only the result of an attractive electron–electron interaction but is additionally the outcome of quantum mechanical constraining forces. There is theoretical and experimental evidence that only these constraining forces operating in superconducting bands may produce eigenstates in which the electrons form Cooper pairs. Here, we report evidence that also the experimentally found superconducting state in bismuth at ambient as well as at high pressure is stabilized by constraining forces.
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Keywords:
superconductivity; bismuth at ambient pressure; Bi–I; bismuth at high pressure; Bi–V; constraining forces; nonadiabatic Heisenberg model
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Krüger, E. Constraining Forces Stabilizing Superconductivity in Bismuth. Symmetry 2018, 10, 44.
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