Single-crystalline transition metal phosphide superconductor WP studied by Raman spectroscopy and first-principles calculations
Yanmin Zhang, Luo Yan, Wei Wu, Ge He, Jingsong Zhang, Zhuang Ni, Xingyu Jiang, Mingyang Qin, Feng Jin, Jie Yuan, Beiyi Zhu, Qihong Chen, Liujiang Zhou, Yangmu Li, Jianlin Luo, Kui Jin
DOI 10.1103/PhysRevB.105.174511 · Physical Review B
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Abstract
We present a study of phonon modes and electron-phonon coupling in superconductor WP using angle-resolved 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 Ag and B3g phonon modes with polarization- and angle-resolved Raman measurements. For the observed seven modes, the total electron-phonon coupling parameter λ 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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| WP Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.84 | Pressure unresolved | unknown |
| RuP Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.7 | Pressure not reported | unknown |
| MnP Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1 | 8 GPa | unknown |
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