Anomalous Raman scattering from phonons and electrons of superconducting FeSe0.82

Kumar P; Kumar A; Saha SMuthu DVSPrakash JPatnaik SWaghmare UVGanguli AKSood AK

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Anomalous Raman scattering from phonons and electrons of superconducting FeSe0.82

机译：Anomalous Raman scattering from phonons and electrons of superconducting FeSe0.82

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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.

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来源
《Solid State Communications》 |2010年第14期|557-560|共4页
作者
Kumar P; Kumar A; Saha SMuthu DVSPrakash JPatnaik SWaghmare UVGanguli AKSood AK;
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作者单位

Theoretical Sciences Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore-560064, India;

Department of Chemistry, Indian Institute of Technology, New Delhi-110016, India;

Department of Physics, Indian Institute of Science, Bangalore-560012, IndiaSchool of Physical Sciences, Jawaharlal Nehru University, New Delhi-110067, India;

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正文语种英语
中图分类固体物理学;
关键词
Superconductors; Spin-phonon coupling;

Anomalous Raman scattering from phonons and electrons of superconducting FeSe0.82

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