P-T phase diagram of iron arsenide superconductor NdFeAsO0.88F0.12

Описание

Тип публикации: статья из журнала

Год издания: 2012

Идентификатор DOI: 10.1209/0295-5075/100/46005

Аннотация: NdFeAsO0.88F0.12 belongs to the recently discovered family of high-T-C iron-based superconductors. We have studied the influence of high pressure on transport properties of this material at low temperatures using the four-probe electrical conductivity technique in a diamond cell. Contrary to La-based compounds, we did not observe aПоказать полностьюmaximum in T-C under pressure. Under compression, T-C drops rapidly as a linear function of pressure with the slope k = -2.8 +/- 0.1 K/GPa. Under decompression, the behavior is completely reversible. The extrapolated value of T-C at zero pressure is about T-C(0) = 51.7 +/- 0.4 K. At pressures higher than similar to 18.4 GPa, the superconducting state disappears at all measured temperatures, although electrical resistance changes slope dramatically and shows a concave behavior. These observations may be related to the Kondo effect or to a weak localization of two-dimensional carriers at high pressures and low temperatures below similar to 45 K, indicating a competition mechanism with the superconducting phase. On the bases of our experimental data, we propose a tentative P-T phase diagram of NdFeAsO0.88F0.12. Copyright (C) EPLA, 2012

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Издание

Журнал: EPL

Выпуск журнала: Vol. 100, Is. 4

ISSN журнала: 02955075

Место издания: MULHOUSE

Издатель: EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY

Авторы

  • Gavriliuk A.G. (Institute for Nuclear Research,Russian Academy of Sciences)
  • Struzhkin V.V. (Geophysical Laboratory,Carnegie Institution of Washington)
  • Yu Y. (Department of Geological Sciences,Jackson School of Geosciences,University of Texas at Austin)
  • Mironovich A.A. (Institute for Nuclear Research,Russian Academy of Sciences)
  • Ovchinnikov S.G. (Siberian Federal University)
  • Korshunov M.M. (Siberian Federal University)
  • Lin J.F. (Department of Geological Sciences,Jackson School of Geosciences,University of Texas at Austin)
  • Jin C. (Beijing National Lab for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences)

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