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Title: Resistive upper critical field of high- Tc single crystals of Bi2Sr2CaCu2O8
Authors: Alexandrov, A.S.
Zavaritsky, V.N.
Liang, W.Y.
Nevsky, P.L.
Issue Date: 1996
Publisher: © American Physical Society
Citation: ALEXANDROV et al, 1996. Resistive upper critical field of high- Tc single crystals of Bi2Sr2CaCu2O8. Physical Review Letters, 76(6), pp 983–986
Abstract: The upper critical field Hc2(T) of Bi2Sr2CaCu2O8 crystals with Tc>92 K has been measured from the out-of-plane resistivity in magnetic fields (H ⊥ ab) up to 15 T. By the use of the empirical procedure the Hc2(T) curve has been extrapolated up to Hc2≃230 T and T/Tc≃0.35 which is independent of the choice of the R/RN ratio. We found that Hc2(T) does not follow the conventional theory with or without fluctuations but is consistent with the prediction based on the Bose-Einstein condensation of charged bosons formed above Tc. Our results together with the heat capacity measurements provide an evidence for the possibility of 2e Bose liquid ground state of high-Tc oxides.
Description: This article was published in the journal, Physical Review Letters [© American Physical Society]. It is also available: http://link.aps.org/abstract/PRL/v76/p983.
URI: https://dspace.lboro.ac.uk/2134/1314
ISSN: 0031-9007
Appears in Collections:Published Articles (Physics)

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