Kumar, Pradeep ; Anil Kumar, ; Saha, Surajit ; Muthu, D. V. S. ; Prakash, J. ; Patnaik, S. ; Waghmare, U. V. ; Ganguli, A. K. ; Sood, A. K. (2010) Anomalous Raman scattering from phonons and electrons of superconducting Solid State Communications, 150 (13-14). pp. 557-560. ISSN 0038-1098
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S00381...
Related URL: http://dx.doi.org/10.1016/j.ssc.2010.01.033
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 ˜5% in the frequency below a temperature Ts ( ˜ 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 (x2-y2) to xz/yz d-orbitals of Fe.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | A. Superconductors; D. Spin–phonon Coupling |
| ID Code: | 669 |
| Deposited On: | 25 Sep 2010 05:04 |
| Last Modified: | 16 May 2016 11:53 |
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