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One-Dimensional Textures and Critical Velocity in Superfluid 3He-A | | J. Kopu
; R. Hänninen
; E.V. Thuneberg
; | | Date: |
13 Mar 2000 | | Journal: | Phys. Rev. B 62, 12374 (2000) | | Subject: | cond-mat | | Abstract: | We study theoretically the stability of flow in superfluid 3He-A. The calculations are done using a one-dimensional model where the order parameter depends only on the coordinate in the direction of the superfluid velocity v_s. We concentrate on the case that the external magnetic field H is perpendicular to v_s, where only few results are available analytically. We calculate the critical velocity v_c at which the superflow becomes unstable against the formation of continuous vortices. The detailed dependence of v_c on the temperature and on the form of the underlying orbital texture l(r) is investigated. Both uniform and helical textures and two types of domain-wall structures are studied. The results are partially in agreement with experiments made in a rotating cylinder. | | Source: | arXiv, cond-mat/0003210 | | Services: | Forum | Review | PDF | Favorites | |
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