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28 March 2024
 
  » pubmed » pmid15089504

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Null orbital frustration at the pseudogap boundary in a layered cuprate superconductor
L Krusin-Elbaum ; T Shibauchi ; C H Mielke ;
Date 5 Mar 2004
Journal Phys Rev Lett, 92 (9), 097005
AbstractWe assess the relative importance of orbital frustration at the pseudogap closing field H(pg). Using interlayer tunneling transport in pulsed magnetic fields nearly up to 60 T, we track the field-temperature (H-T) phase diagram for fields parallel ( parallel ab) and normal ( parallel c) to the layered structure of Bi(2)Sr(2)CaCu(2)O(8+y). In contrast to large orientational anisotropy of the superconducting state related to the orbital motion of Cooper pairs, we find anisotropy of H(pg) temperature independent and small, due solely to the g factor. The obtained Zeeman relation with the pseudogap temperature T small star, filled, g( parallel c)micro(B)H( parallel c)(pg)=g( parallel ab)micro(B)H( parallel ab)(pg) approximately k(B)T small star, filled, is fully consistent with the correlations only in the spin channel.
Source PubMed, pmid15089504
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