Kumar, Pradeep and Kumar, Anil and Saha, Surajit and Muthu, DVS and Prakash, J and Patnaik, S and Waghmare, UV and Ganguli, AK and Sood, AK (2010) Anomalous Raman scattering from phonons and electrons of superconducting FeSe0.82. In: Solid State Communications, 150 (13-14). pp. 557-560.
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Abstract
We report interesting anomalies in the temperature dependent Raman spectra of FeSe0.82 measured from 3 K to 300 K in the spectral range from 60 to 1800 cm(-1) and determine their origin using complementary first-principles density functional calculations. A phonon mode near 100 cm-1 exhibits a sharp increase by similar to 5% in the frequency below a temperature T-s (similar to 100 K) attributed to strong spin-phonon coupling and onset of short-range antiferromagnetic order. In addition, two high frequency modes are observed at 1350 cm-1 and 1600 cm-1, attributed to electronic Raman scattering from (x(2)-y(2)) to xz/yz d-orbitals of Fe. (C) 2010 Elsevier Ltd. All rights reserved.
Item Type: | Journal Article |
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Publication: | Solid State Communications |
Publisher: | Elsevier Science |
Additional Information: | Copyright of this article belongs to Elsevier Science. |
Keywords: | Superconductors;Spin-phonon coupling |
Department/Centre: | Division of Physical & Mathematical Sciences > Physics |
Date Deposited: | 25 Jun 2010 05:29 |
Last Modified: | 19 Sep 2010 06:00 |
URI: | http://eprints.iisc.ac.in/id/eprint/27240 |
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