Anomalous phonon peak in the superconducting state of (ErNi2B2C)-B-11

Article

关键词: SINGLE-CRYSTAL GROWTH;    NEUTRON-SCATTERING;    LUNI2B2C;    YNI2B2C;    SPECTROSCOPY;   

DOI  :  10.1103/PhysRevB.66.212503

来源: SCIE

【 摘 要 】

An anomalous phonon peak that appears only in the superconducting state has been reported for nonmagnetic intermetallic superconductor (RNi2B2C)-B-11 (R=Y, Lu). In the present paper, we shall demonstrate that another rare-earth borocarbide (ErNi2B2C)-B-11 seems to show similar phonon anomalies. A spectral weight transfer from the above-lying TA phonon mode to the aforementioned peak was rather small, but it is consistent with the theoretical prediction for the system with smaller 2Delta/E-ph ratio. Combining the present results with those observed in the other borocarbide systems, we suggest that such a phonon anomaly might be a common phenomenon for superconductors with a strong nesting feature of the Fermi surface.

【 授权许可】

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