Ghosh, Arindam ; Raychaudhuri, A. K. ; Sreekala, R. ; Rajeswari, M. ; Venkatesan, T. (1998) Low-energy excitations in crystalline perovskite oxides: evidence from noise experiments Physical Review B: Condensed Matter and Materials Physics, 58 (22). R14665-R14668. ISSN 1098-0121
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Official URL: http://prb.aps.org/abstract/PRB/v58/i22/pR14665_1
Related URL: http://dx.doi.org/10.1103/PhysRevB.58.R14665
Abstract
In this paper we report measurements of 1/f noise in a crystalline metallic oxide with perovskite structure down to 4.2 K. The results show existence of localized excitations with average activation energy ≈70-80meV which produce a peak in the noise at T≈35-40K. In addition, it shows clear evidence of tunnelling-type two-level systems (as in glasses) which show up in noise measurements below 30 K.
| Item Type: | Article |
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| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 42689 |
| Deposited On: | 06 Jun 2011 05:54 |
| Last Modified: | 17 May 2016 23:54 |
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