Ghosh, Arindam and Raychaudhuri, AK and Sreekala, R and Rajeswari, M and Venkatesan, T (1998) Low-energy excitations in crystalline perovskite oxides: Evidence from noise experiments. In: Physical Review B: Condensed Matter, 58 (22). pp. 14665-14668.
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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 approximate to 70-80 meV which produce a peak in the noise at T approximate to 35-40 K. Ln addition, it shows clear evidence of tunnelling-type two-level systems las in glasses) which show up in noise measurements below 30 K.
|Item Type:||Journal Article|
|Additional Information:||Copyright of this article belongs to American Physical Society.|
|Department/Centre:||Division of Physical & Mathematical Sciences > Physics|
|Date Deposited:||22 Dec 2009 07:43|
|Last Modified:||19 Sep 2010 05:25|
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