期刊
PHYSICAL REVIEW B
卷 105, 期 17, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.105.174511
关键词
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资金
- National Key Research and Development of China [2017YFA0302902, 2021YFA0718700]
- National Natural Science Foundation of China [12104490, 12134018, 11927808, 11921004]
- China Postdoctoral Sci-ence Foundation [2020M680729]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB25000000]
- CAS Interdisciplinary Innovation Team
- Beijing Natural Science Foundation [Z190008]
- Center for Materials Genome
- Alexander von Hum-boldt Foundation
This study investigates the phonon modes and electron-phonon coupling in superconductor WP using angle-resolved polarized Raman spectroscopy. The results indicate that low-frequency phonon modes play a crucial role in superconductivity.
We present a study of phonon modes and electron-phonon coupling in superconductor WP using anglere-solved polarized Raman spectroscopy. Seven out of twelve Raman-active modes are detected, with frequencies in good accordance by the first-principles calculations. We analyze parallel- and cross-polarized configurations of A(g) and B-3g phonon modes with polarization- and angle-resolved Raman measurements. For the observed seven modes, the total electron-phonon coupling parameter lambda is only about 0.07, which is too small to achieve superconductivity. Our results elucidate that the low-frequency phonon modes play a key role in the superconductivity within the Bardeen-Cooper-Schrieffer theory framework.
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