Ferroelectric quantum criticality and enhanced superconductivity in plastically deformed strontium titanate · HackerPapers discussions

Ferroelectric quantum criticality and enhanced superconductivity in plastically deformed strontium titanate — mentioned by z2h-a6n

Fri, 23 Sep 2022 01:29:11 GMT

To provide some rough intuition, I might point out that in order for a material to become superconducting, there must be some interaction in the material that allows the electrons to form Cooper pairs, and these interactions are more likely to occur in crystalline systems. In typical BCS superconductors for example, the electrons interact with atomic lattice vibrations (called phonons) to form these pairs. The work being discussed indicates that the relevant interactions are (magnetic) superexchange interactions between electrons are relevant in the cuprates (although I'd say more work is…

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Ferroelectric quantum criticality and enhanced superconductivity in plastically deformed strontium titanate — mentioned by z2h-a6n

Fri, 23 Sep 2022 01:29:07 GMT

> It may be that you simply need to construct the right geometry between nodes to get superconductivity. I would say that the key thing is to construct the right interactions between electrons. That said, the geometry (or structure, as we would generally say in condensed matter physics) is one of the key parts of what determines the interactions in a material, so this is certainly one approach. In practice, it is difficult to tune the structure of most materials except by applying pressure, or by changing to a different (possibly related) material, so finely tuning the interactions by…

Paper and discussion history. A mention is not an endorsement.