Mon, December 16, 2019   Advanced Search

An Evaluation of Pseudo Gap in High Tc-Superconductor

MIRZA ABBAS HUSSIAN* and L. K. MISHRA

*Department of Physics, Oriental College Patna –City 800008, Bihar, India.
Department of Physics, Magadh University, Bodh Gaya – 824 234, Bihar, India.

ABSTRACT

We have studied the Pseudo gap through pairing scenario based on Nozieres and Schmitt - Rink theory. The central theme of this theory is the Cross-over problem from BCS superconductivity to Bose-Einstein Condensation (BEC). Pseudo gap state is regarded as a cross-over region. There is a co-existence of fermions and bosons in this region. Evaluating the self-energy from T-matrix approach, we have studied the Pseudo gap in the single particle excitation.

Keywords : Pseudo gap, crossover, BCS, BEC, Self –energy, T-matrix approach, Single particle excitation