title: Novel dielectric anomaly in the hole-doped La(2)Cu(1-x)Li(x)O(4) and La(2-x)Sr(x)NiO(4) insulators: signature of an electronic glassy state.
abstract: The low-frequency dielectric response of hole-doped insulators La(2)Cu(1-x)Li(x)O(4) and La(2-x)Sr(x)NiO(4) shows a large dielectric constant epsilon(') at high temperature and a steplike drop by a factor of 100 at a material-dependent low temperature T(f). T(f) increases with frequency, and the dielectric response shows universal scaling in a Cole-Cole plot, suggesting that a charge-glass state is realized both in the cuprates and in the nickelates.
authors.affiliation: Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
authors.forename: Tuson
authors.initials: T
authors.lastname: Park
authors.forename: Z
authors.initials: Z
authors.lastname: Nussinov
authors.forename: K R A
authors.initials: KR
authors.lastname: Hazzard
authors.forename: V A
authors.initials: VA
authors.lastname: Sidorov
authors.forename: A V
authors.initials: AV
authors.lastname: Balatsky
authors.forename: J L
authors.initials: JL
authors.lastname: Sarrao
authors.forename: S-W
authors.initials: SW
authors.lastname: Cheong
authors.forename: M F
authors.initials: MF
authors.lastname: Hundley
authors.forename: Jang-Sik
authors.initials: JS
authors.lastname: Lee
authors.forename: Q X
authors.initials: QX
authors.lastname: Jia
authors.forename: J D
authors.initials: JD
authors.lastname: Thompson