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 |
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| Authors: | Park Tuson Nussinov Z Hazzard K R A Sidorov V A Balatsky A V Sarrao J L Cheong S-W Hundley M F Lee Jang-Sik Jia Q X Thompson J D |
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| Affiliation: | Los Alamos National Laboratory, Los Alamos, NM 87545, USA. |
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| 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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