Doping dependence of isotope exponent in YBa2Cu3O6+x (x=0.4-1.0) within Van Hove scenario

Authors
Shamsuzzaman, AM Shareef, S Naquib, SH Islam, AKMA
Citation
Am. Shamsuzzaman et al., Doping dependence of isotope exponent in YBa2Cu3O6+x (x=0.4-1.0) within Van Hove scenario, I J PA PHYS, 37(2), 1999, pp. 133-135
Citations number
11
Categorie Soggetti
Physics
Journal title
INDIAN JOURNAL OF PURE & APPLIED PHYSICS
ISSN journal
00195596 → ACNP
Volume
37
Issue
2
Year of publication
1999
Pages
133 - 135
Database
ISI
SICI code
0019-5596(199902)37:2<133:DDOIEI>2.0.ZU;2-I
Abstract
Isotope exponent alpha of YBa2Cu3O6+x has been analysed with oxygen content (x=0.4-1.0) by using exact expressions for isotope shift exponent for a el ectronic density of states (EDOS) in the Van I-love singularity scenario (V HS). The result;reproduces the general experimental trend of alpha as a fun ction of x. The theoretical value of alpha at optimum doping has been found lesser than that obtained by other workers, though the experimental value is still smaller.