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arXiv · 1908.04419

Superconducting materials: the w$hole$ story

J. E. Hirsch
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Abstract

Ted Geballe has contributed enormously to the knowledge of superconducting materials during an illustrious scientific career spanning seven decades, encompassing groundbreaking discoveries and studies of both so-called conventional and unconventional superconductors. On the year of his 100th birthday I would like to argue that all superconducting materials that Ted investigated, as well as those he did not, have one thing in common that is not generally recognized: hole carriers. This includes $PbTe$ doped with $Tl$, for which Ted has proposed that superconductivity is driven by negative-U pairing. I will discuss why hole carriers are necessary for a material to be a superconductor, and the implications of this for the understanding of the fundamental physics of superconductivity.

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J. E. Hirsch. 2019-08-04. Superconducting materials: the w$hole$ story. https://doi.org/10.1007/s10948-019-05284-5

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