Anjan K. Gupta

TL;DR: The presence of an electronic inhomogeneity is reported in Bi2Sr2CaCu2O8+x, a consequence of proximity to a Mott insulator resulting in poor screening of the charge potentials associated with the oxygen ions left in the BiO plane after doping, and is indicative of the local nature of the superconducting state.

TL;DR: In this paper, an electronic inhomogeneity was observed in high-Tc superconductor Bi2Sr2CaCu2O8+x using scanning tunnelling microscopy/spectroscopy.

TL;DR: Low temperature scanning tunneling microscopy studies of the electronic structure of vortex cores in Bi 2Sr 2CaCu 2O (8+delta) reveal an exponential decay of these "core states" with the fourfold symmetry sometimes predicted for d-wave vortices is not seen in spectroscopic vortex images.

TL;DR: Low-temperature scanning tunneling spectroscopy of the high transition temperature (high-Tc) cuprate Bi2Sr2CaCu2O8+delta reveals the existence of large numbers of identical regions with diameters of about 3 nanometers that have a relatively high density of low-energy quasi-particle states, consistent with theories of strong quasi- particle scattering from atomic-scale impurities in a d-wave superconductor.

TL;DR: In this paper, the temperature dependence of the superconducting quantum interference device (SQUID) with weak links as Josephson junctions has been investigated and the effect of weak link geometry in order to widen the temperature range of hysteresis-free operation.