Hall effect in the mixed state of Nd1.85Ce0.15CuO4-δ

A. W. Smith, S. J. Hagen, M. Rajeswari, J. L. Peng, Z. Y. Li, R. L. Greene, S. N. Mao, X. X. Xi, S. Bhattacharya, Q. Li, C. J. Lobb

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We observe a sign reversal of the Hall resistivity in the mixed state of the n-type superconductor Nd1.85Ce0.15CuO4-δ. Such an anomaly, which has also been observed earlier in the p-type oxide superconductors, has been widely attributed to thermoelectric effects, pinning effects, or else to complicated band structures. Recently, based on the systematics of the sign reversal in a wide class materials, there have been attempts to explain the anomaly as an intrinsic aspect of the vortex motion. The behavior of the Hall resistivity in Nd1.85Ce0.15CuO4-δ serves as a test for some of the models mentioned above. Particularly, a model based on thermoelectric effects which has been suggested to explain the sign reversal in the p-type superconductor YBa2Cu3O7-δ does not predict the sign change in Nd1.85Ce0.15CuO4-δ. The observation of the Hall anomaly in this n-type systems supports the idea that the sign reversal is intrinsically linked to the vortex dynamics in the flux flow state.

Original languageEnglish (US)
Pages (from-to)2257-2258
Number of pages2
JournalPhysica B: Physics of Condensed Matter
Issue numberPART 2
StatePublished - Feb 2 1994

All Science Journal Classification (ASJC) codes

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


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