title: 77Se and 63Cu NMR studies of the electronic correlations in CuxTiSe2 (x = 0.05, 0.07).
abstract: We report a (77)Se and (63)Cu nuclear magnetic resonance (NMR) investigation on the charge-density-wave (CDW) superconductor Cu(x)TiSe(2) (x = 0.05 and 0.07). At high magnetic fields where superconductivity is suppressed, the temperature dependence of (77)Se and (63)Cu spin-lattice relaxation rates 1/T(1) follow a linear relation. The slope of (77)Se 1/T(1) versus T increases with the Cu doping. This can be described by a modified Korringa relation which suggests the significance of electronic correlations and the Se 4p- and Ti 3d-band contribution to the density of states at the Fermi level in the studied compounds.
authors.affiliation: Department of Physics, Florida State University, Tallahassee, FL 32310, USA. lloyd.lumata@utsouthwestern.edu
authors.forename: L L
authors.initials: LL
authors.lastname: Lumata
authors.forename: K Y
authors.initials: KY
authors.lastname: Choi
authors.forename: J S
authors.initials: JS
authors.lastname: Brooks
authors.forename: A P
authors.initials: AP
authors.lastname: Reyes
authors.forename: P L
authors.initials: PL
authors.lastname: Kuhns
authors.forename: G
authors.initials: G
authors.lastname: Wu
authors.forename: X H
authors.initials: XH
authors.lastname: Chen