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Article: Correlated creep rate of a vortex line under the effect of vortex tension and its relation to the glitches of pulsars

TitleCorrelated creep rate of a vortex line under the effect of vortex tension and its relation to the glitches of pulsars
Authors
Issue Date1993
PublisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
Citation
Physical Review B, 1993, v. 47 n. 5, p. 2707-2714 How to Cite?
AbstractIn our earlier works, we have calculated the correlated creep velocity of a vortex line with line tension, which is pinned to a perfect simple-cubic lattice, and creeps out under the action of a biased potential by thermal activation. In this paper, we extend the result to cases in which the biased potential, the line tension, and the pinning energy of the line are all functions of position. Although an evaluation of the exact correlated creep velocity is difficult, a good approximate form can be found. We show that the Anderson-Kim thermal-activation formula in the vortex-creep model is still valid after suitable modification even though their uncorrelated-creeping assumption is incorrect. We apply our formalism to study the motion of vortex lines in the crustal region of neutron stars. The model results suggests that the steady-state configuration of vortex lines should form a set of hyperbolic-like curves because the stronger-pinning regions (which also have higher tension) are located in the inner regions of the crust. Perturbations, like a star quake, can cause a large number of vortex lines to unpin from the stronger-pinning region and the tension forces the vortex lines to move by a macroscopic distance. Such a mechanism may be responsible for the glitches of pulsars. © 1993 The American Physical Society.
Persistent Identifierhttp://hdl.handle.net/10722/175005
ISSN
2001 Impact Factor: 3.07
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorChau, HFen_US
dc.contributor.authorCheng, KSen_US
dc.date.accessioned2012-11-26T08:48:44Z-
dc.date.available2012-11-26T08:48:44Z-
dc.date.issued1993en_US
dc.identifier.citationPhysical Review B, 1993, v. 47 n. 5, p. 2707-2714en_US
dc.identifier.issn0163-1829en_US
dc.identifier.urihttp://hdl.handle.net/10722/175005-
dc.description.abstractIn our earlier works, we have calculated the correlated creep velocity of a vortex line with line tension, which is pinned to a perfect simple-cubic lattice, and creeps out under the action of a biased potential by thermal activation. In this paper, we extend the result to cases in which the biased potential, the line tension, and the pinning energy of the line are all functions of position. Although an evaluation of the exact correlated creep velocity is difficult, a good approximate form can be found. We show that the Anderson-Kim thermal-activation formula in the vortex-creep model is still valid after suitable modification even though their uncorrelated-creeping assumption is incorrect. We apply our formalism to study the motion of vortex lines in the crustal region of neutron stars. The model results suggests that the steady-state configuration of vortex lines should form a set of hyperbolic-like curves because the stronger-pinning regions (which also have higher tension) are located in the inner regions of the crust. Perturbations, like a star quake, can cause a large number of vortex lines to unpin from the stronger-pinning region and the tension forces the vortex lines to move by a macroscopic distance. Such a mechanism may be responsible for the glitches of pulsars. © 1993 The American Physical Society.en_US
dc.languageengen_US
dc.publisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/en_US
dc.relation.ispartofPhysical Review Ben_US
dc.titleCorrelated creep rate of a vortex line under the effect of vortex tension and its relation to the glitches of pulsarsen_US
dc.typeArticleen_US
dc.identifier.emailChau, HF: hfchau@hku.hken_US
dc.identifier.emailCheng, KS: hrspksc@hkucc.hku.hken_US
dc.identifier.authorityChau, HF=rp00669en_US
dc.identifier.authorityCheng, KS=rp00675en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1103/PhysRevB.47.2707en_US
dc.identifier.scopuseid_2-s2.0-33644999862en_US
dc.identifier.volume47en_US
dc.identifier.issue5en_US
dc.identifier.spage2707en_US
dc.identifier.epage2714en_US
dc.identifier.isiWOS:A1993KL78900036-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridChau, HF=7005742276en_US
dc.identifier.scopusauthoridCheng, KS=9745798500en_US

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