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. 2005 Jan 14;94(1):017002.
doi: 10.1103/PhysRevLett.94.017002. Epub 2005 Jan 12.

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

Tuson Park  1 , Z Nussinov, K R A Hazzard, V A Sidorov, A V Balatsky, J L Sarrao, S-W Cheong, M F Hundley, Jang-Sik Lee, Q X Jia, J D Thompson
Affiliations

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

Tuson Park et al. Phys Rev Lett. .

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.

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