Observation of a Raman-active phonon with Fano line shape in the quasi-one-dimensional superconductor K2Cr3As3
W.-L. Zhang, H. Li, Dai Xia, H. W. Liu, Y.-G. Shi, J. L. Luo, Jiangping Hu, P. Richard, H. Ding
DOI 10.1103/PhysRevB.92.060502 · Physical Review B
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Abstract
We performed a polarized Raman scattering study of the quasi-one-dimensional superconductor K2Cr3As3. We detect two A1′ phonons and three E′ phonons. One of the A1′ modes exhibits a nearly temperature-independent Fano line shape. Based on our first-principles calculations, we ascribe this mode to the in-phase vibrations of Cr atoms within one layer. This observation suggests that the magnetic fluctuations in K2Cr3As3 are coupled to the electronic structure via the lattice.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| K2Cr3As3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.1 | Pressure not reported | unknown |
| Rb2Cr3As3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Cs2Cr3As3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| CrAs Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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