Hall 123

Theory of Confined High Tc Superconductivity in Monovalent Metals

G. Baskaran

IMSc.

Monovalent non-transition metals are robust Fermi liquids. They defy
superconductivity even at
lowest temperatures (Li is a minor exception:Tc ≈ 0.4 mK). However,
Thapa and Pandey [1] have
recently reported signals for ambient temperature granular
superconductivity in Ag nanoparticle
embedded in Au matrix. We develop a theory for monovalent metals [2],
where competing superconducing, CDW and SDW orders exist. All of them
lose and get confined (go off-shell). A robust Fermi liquid remains
on-shell. We discuss Thapa, Pandey's observations in the light of our
theory. superconductivity and how a confined superconductivity is
liberated. Beneath a calm Fermi sea, strong supercurrents may exist in several metals.

[1] D.K.Thapa and A. Pandey, arXiv:1807.08572

[2] G. Baskaran, arXiv:1808.02005