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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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|
|Additional Information:||Copyright of this article belongs to Elsevier Science.|
|Department/Centre:||Division of Physical & Mathematical Sciences > Physics|
|Date Deposited:||25 Jun 2010 05:29|
|Last Modified:||19 Sep 2010 06:00|
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