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Three-dimensional X...
Three-dimensional XY critical fluctuations of the dc electrical conductivity in Bi2Sr2CaCu2O8+delta single crystals
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Han, S. H. (författare)
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Eltsev, Y. (författare)
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- Rapp, Östen. (författare)
- KTH,Mikroelektronik och informationsteknik, IMIT
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(creator_code:org_t)
- 2000
- 2000
- Engelska.
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Ingår i: Physical Review B. Condensed Matter and Materials Physics. - 1098-0121 .- 1550-235X. ; 61:17, s. 11776-11779
- Relaterad länk:
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https://urn.kb.se/re...
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visa fler...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- A method is presented to analyze the dc critical fluctuation conductivity Delta sigma of Bi2Sr2CaCu2O8+delta single crystals in zero magnetic field. Two crossovers are obtained upon approaching T-c; first the Ginzburg crossover from the mean-held region to the initial critical regime, where the critical exponent a of Delta sigma changes from -1/2 to -2/3, and then, closer to T-c, a crossover of alpha form -2/3 to 1/3 in the critical region. Good agreement is found with the expectations from the three-dimensional XY model.
Nyckelord
- high-tc superconductors
- ii superconductors
- phase-transitions
- magnetic-field
- yba2cu3o7-delta
- magnetoconductivity
- paraconductivity
- diamagnetism
- growth
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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