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VOLUME 48 (1988) | ISSUE 1 |
PAGE 39
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Splitting of the superconducting transition in high-temperature superconductors due to a slight orthorhombic nature
Volovik G. E.
The splitting of a superconducting transition which has been observed in YBa2Cu307 [S. E. Inderhees etal, Phys. Rev. Lett. 60,1178 (1988); M. Ishikawa etal, Technical Reports of ISSP (Japan), A No. 1907, University of Tokyo, Institute of Solid State Physics, February 1988 ] is similar to the splitting of the superfluid transition in 3Не-Л which is caused by a magnetic field. In the superconducting case, the role of the magnetic field is played by an orthorhombic distortion of the tetragonal crystal symmetry. This similarity suggests the possibility of d pairing in this high-temperature superconductor.
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