Microscopic electronic inhomogeneity in the high-T[sub c] superconductor...

Authors :: Pan, S.H.
O'Neal, J.P.
Badzey, R.L.
Chamon, C.
Ding, H.
Engelbrecht, J.R.
Wang, Z.
Eisaki, H.
Uchida, S.
Gupta, A.K.
Ng, K.-W.
Hudson, E.W.
Lang, K.M.
Davis, J.C.
Source :: Nature; 9/20/2001, Vol. 413 Issue 6853, p282, 4p, 4 Color Photographs, 2 Diagrams, 7 Graphs
Publication Year :: 2001
Abstract: Reports on the presence of an electronic inhomogeneity in the high-temperature superconductor Bi[sub2]Sr[sub 2]CaCu[sub 2]O[sub 8+x], using scanning tunneling microscopy and spectroscopy. Spatial variations in both the local density of states spectrum and the superconducting energy gap; View that the inhomogeneity is a consequence of the proximity to a Mott insulator resulting in poor screening of the charge potentials associated with the oxygen ions left in the BiO plan after doping.