Anomalous quasiparticle excitations in Y(Ni1-xPtx)2B2C

K. Ohishi, K. Kakuta, J. Akimitsu, A. Koda, W. Higemoto, R. Kadono, J. E. Sonier, A. N. Price, R. I. Miller, R. F. Kiefl, M. Nohara, H. Suzuki, H. Takagi

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8 Citations (Scopus)

Abstract

We have found that although the magnetic penetration depth λ increases linearly in H in YNi2B2C, λ in Y(Ni0.8Pt0.2)2B2C was found to be independent of H for H ≤ 0.4Hc2, suggesting that the superconducting gap is effectively isotropic. These results are consistent with the change in the structure of order parameter suggested by photoelectron spectroscopy. However, λ in the Pt-doped sample is about 1.27 times larger than that estimated for an impurity effect, suggesting that the quasi-particles are not completely localized inside the vortex cores. Crown

Original languageEnglish
Pages (from-to)364-368
Number of pages5
JournalPhysica B: Condensed Matter
Volume326
Issue number1-4
DOIs
Publication statusPublished - Feb 2003

Keywords

  • Borocarbide
  • Penetration depth
  • Quasi-particle excitations
  • Vortex core radius

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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    Ohishi, K., Kakuta, K., Akimitsu, J., Koda, A., Higemoto, W., Kadono, R., Sonier, J. E., Price, A. N., Miller, R. I., Kiefl, R. F., Nohara, M., Suzuki, H., & Takagi, H. (2003). Anomalous quasiparticle excitations in Y(Ni1-xPtx)2B2C. Physica B: Condensed Matter, 326(1-4), 364-368. https://doi.org/10.1016/S0921-4526(02)01628-9