Paper detail

Emergent Mott Insulators and Possibility of High Tc Superconductivity in Pressurized Molecular Solids, H2S, SiH4, H2 etc

Paired valence electrons forming covalent bonds in molecues are confined cooper pair correlations. High pressure dissociates molecules in solid H2S, SiH4, H2 etc. and form extended structures. However, valence electrons are resilient and continue to bond and sometimes resonate. It is suggested that some structures contain emergent Mott insulators (EMI) and support superconductivity and other phases, under special conditions. In pressurized solid H2S, we propose presence of a sublattice of relatively narrow, nearly half filled band of H atoms, trapped in ordered interstitials of colvalently bonded S atom network. EMI offers a high pairing energy scale. A theory for recently claimed superconductivity in solid \hsm (Tc ~ 205 K), Silane (Tc ~ 17 K$), and systems like H2 is presented.