Elastic Tensor of YNi_2B_2C

The complete elastic tensor of YNi_2B_2C was determined by application of the resonant ultrasound spectroscopy technique to a single-crystal sample. Elastic constants were found to be in good agreement with partial results obtained from `time-of-flight' measurements performed on samples cut from the same ingot. From the measured constants, the bulk modulus and Debye temperature are calculated.Comment: 5 pages, 3 figure

LuRh2Si2: Sensitivity of the Fermi surface to the Si z-position

We present band structure calculations of the non-magnetic compound LuRh2Si2 which serves as a reference for YbRh2Si2, a prototypical material for the investigation of quantum critical points. The relative z position of the Si atoms is found to have a strong impact on the band structure and the Fermi surface topology. We find the total energy to be minimized for z=0.381c whereas a comparison of predicted extremal orbits with Shubnikov-de Haas frequencies shows best agreement at the experimental value z=0.379c. We therefore recommend usage of z=0.379c for future electronic structure calculations of LuRh2Si2 and YbRh2Si2. \ua9 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.Peer reviewed: YesNRC publication: Ye

Transport near a quantum critical point in bafe2(as1-xpx)2

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