4 papers · 1 filter
On Possible Coexistence of Superconductivity and Charge Density Wave in Hole Doped C
Sanjoy K. Sarker
We study metallic behavior and superconductivity in C materials in terms of a tight binding model characterized by an intramolecular, nonretarded attraction. It was shown pr…
Spin-Charge Binding Mechanism for Superconductivity in Cuprates
Sanjoy K. Sarker
A spin-charge recombination route to superconductivity, proposed earlier (1992)], is examined using the Schwinger boson representation of the t-J model. The representation is known…
Spin Gap and Superconductivity in the Interlayer Pair Tunneling Model
Sanjoy K. Sarker, Philip W. Anderson
A simple interlayer pair tunneling is solved exactly. We find that in the normal state spin-1/2 particle and hole excitations are gapped. But the state is an unusual metal, charact…
Fermi Liquid - Non-Fermi Liquid Transition in the Double Exchange Model
Sanjoy K. Sarker
Motivated by recent discovery of colossal magnetoresistance in LaCaMnO and other manganites, we have studied the double exchange model. We argue that the forced alig…