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Vortices in coupled planes with columnar disorder and bosonic ladders | | E. Orignac
; T. Giamarchi
; | | Date: |
7 Dec 1997 | | Journal: | Phys. Rev. B 57 p. 11713 (1998) | | Subject: | Strongly Correlated Electrons | cond-mat.str-el | | Affiliation: | Laboratoire de Physique des Solides, Universite de Paris-Sud | | Abstract: | We consider two coupled strongly correlated bosonic chains. We derive the phase diagram of the pure system and obtain an antisymmetric charge density wave, a 4k_F charge density wave, a superfluid phase and a second superfluid phase which is a condensate of boson pairs. We consider the effect of a weak disorder on that system and show that the superfluid phase is less localized than in the one chain case. On the other hand, the pinning length of the antisymmetric charge density wave is shorter than in the one chain case. We discuss the consequences of these results for two coupled vortex planes with columnar disorder. We show that in the vortex system there is a conventional pinned solid phase for 0T_L. We obtain the critical currents by a modified Larkin-Ovchinnikov argument and prove that there is a strong reduction of critical current for T=T_m. | | Source: | arXiv, cond-mat/9801048 | | Services: | Forum | Review | PDF | Favorites | |
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