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Macroscopic symmetry group describes Josephson tunneling in twinned crystals (1996)

Walker, M. B. ; Luettmer-Strathmann, J.

Springer

Journal of low temperature physics 105 (1996), S. 483-488

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ISSN: 1573-7357

Keywords: 74.20.De ; 74-50.+r ; 74.72.Bk ; 74.62.Bf

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract A macroscopic symmetry group describing the superconducting state of an orthorhombically twinned crystal of YBCO is introduced. This macroscopic symmetry group is different for different symmetries of twin boundaries. Josephson tunneling experiments performed on twinned crystals of YBCO determine this macroscopic symmetry group and hence determine the twin boundary symmetry (but do not experimentally determine whether the microscopic order parameter is primarily d- or s-wave). A consequence of the odd-symmetry twin boundaries in YBCO is the stability of 1/2 Φo vortices at the intersection of a twin boundary and certain grain boundaries.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00768432

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