Abstract
The structures of order parameters which determine the bounds of the phase states within the framework of the CP 1 Ginzburg-Landau model are considered. Using the formulation of this model [1] in terms of the gauged order parameters (the unit vector field n, density ρ2 and momentum c of particles), we found that some universal properties of phases and field configurations are determined by the Hopf invariant Q and its generalizations. At a sufficiently high level of doping, it is found that, outside the superconducting phase, the charge distributions in the form of loops may be more preferable than those in the form of stripes. It is shown that, in phase with its mutual linking number L < Q, the transition to an inhomogeneous superconducting state with nonzero total momentum of pairs takes place. A universal mechanism of breaking of the topological coherence of the superconducting state due to a decrease of the charge density is discussed.
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Translated from Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Fiziki, Vol. 123, No. 6, 2003, pp. 1297–1307.
Original Russian Text Copyright © 2003 by Isaev, Protogenov.
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Isaev, L.S., Protogenov, A.P. Structures of order parameters in inhomogeneous phase states of strongly correlated systems. J. Exp. Theor. Phys. 96, 1140–1148 (2003). https://doi.org/10.1134/1.1591226
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DOI: https://doi.org/10.1134/1.1591226