Anisotropy of electron momentum distribution in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{(}8+d)$ superconductor studied by positron annihilation technique

Mahuya Chakrabarti, A. Sarkar, S. Chattapadhayay +4

The temperature dependent (30 K to 300 K) Doppler broadening of the positron annihilated g-radiation (DBPAR) measurement has been carried out on single crystalline Bi-2212 high Tc…