Open AccessO K and Cu L III edge study of itinerant holes in I 2 ‐, HgI 2 ‐ and HgBr 2 ‐intercalated BSCCO(2212) single crystals
Author(s) -
Garg K. B.,
Dalela B.,
Dalela S.,
Venkatesh S.,
Choy J.H.,
Chaturvedi D.,
Singhal R. K.,
GarciaRuiz J.
Publication year - 2001
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s090904950100125x
Subject(s) - intercalation (chemistry) , xanes , halide , doping , crystallography , coupling (piping) , materials science , condensed matter physics , chemistry , physics , inorganic chemistry , spectral line , metallurgy , astronomy
Intercalation effect on BSCCO (2212) system, although it increases the interlayer distance and the c‐axis remarkably, produces only a small change in the transition temperature. Thus, amongst other things, intercalation provides an effective method to investigate the influence of the inter‐block coupling. Electrons are transferred from the host Cu‐O 2 layers to the guest lmolecules I 2 , HgBr 2 , HgI 2 leading to evolution of the T c . For this we have made high resolution XANES study on the O K and Cu L3 edges to estimate the density of the doping holes. We attempt on basis of our and earlier results the evolution of T c in these as also the much larger decrease produced in T c for I 2 ‐intercalation for which the increase in basal spacing is the smallest of the three halides.