London theory for superconducting phase transitions in external magnetic fields: application to UPt3

London theory for superconducting phase transitions in external magnetic fields: application to UPt3

For multicomponent superconductors, it is known that the presence of symmetry breaking fields can lead to multiple superconducting phase transitions. Motivated by recent small angle neutron scattering experiments on the vortex state of UPt3, the London theory in the vicinity of such phase transition...

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Veröffentlicht in:Physical review letters 2002-07, Vol.89 (1), p.017004-017004
Hauptverfasser: Agterberg, D F, Dodgson, Matthew J W
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container_title Physical review letters
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creator Agterberg, D F
Dodgson, Matthew J W
description For multicomponent superconductors, it is known that the presence of symmetry breaking fields can lead to multiple superconducting phase transitions. Motivated by recent small angle neutron scattering experiments on the vortex state of UPt3, the London theory in the vicinity of such phase transitions is determined. It is found that the form of this London theory is in general quite different than that for conventional superconductors. This is due to the existence of a diverging correlation length associated with these phase transitions. One striking consequence is that nontrivial vortex lattices exist arbitrarily close to H(c1). Applications to UPt3, CeIn3, U(1-x)Th(x)Be(13), electron doped cuprate superconductors, Sr(2)RuO(4), and MgCNi(3) are discussed.
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title London theory for superconducting phase transitions in external magnetic fields: application to UPt3
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