arxiv: 1506.01121 · v1 · pith:AFJIQQQUnew · submitted 2015-06-03 · ❄️ cond-mat.supr-con · cond-mat.str-el

Observation of Raman active phonon with Fano lineshape in 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

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H. Ding

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classification ❄️ cond-mat.supr-con cond-mat.str-el

keywords primefanolineshapeobservationphononsquasi-one-dimensionalramansuperconductor

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We performed a polarized Raman scattering study of quasi-one-dimensional superconductor K$_2$Cr$_3$As$_3$. We detect two A$_1^\prime$ phonons and three E$^\prime$ phonons. One of the A$_1^\prime$ modes exhibits a nearly temperature-independent Fano lineshape. Based on our first-principles calculations, we ascribe this mode to the in-phase vibrations of Cr atoms within one layer. This observation strongly suggests that the magnetic fluctuations in K$_2$Cr$_3$As$_3$ are coupled to the electronic structure \emph{via} the lattice.

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Observation of Raman active phonon with Fano lineshape in quasi-one-dimensional superconductor K₂Cr₃As₃

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