Matthew J. W. Dodgson
ETH Zurich
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Featured researches published by Matthew J. W. Dodgson.
Physical Review B | 2002
Matthew J. W. Dodgson
In very anisotropic layered superconductors (e.g., Bi 2 Sr 2 CaCu 2 O x ) a tilted magnetic field can penetrate as two coexisting lattices of vortices parallel and perpendicular to the layers. At low out-of-plane fields the perpendicular vortices form a set of isolated vortex chains, which have recently been observed in detail with scanning Hall-probe measurements. We present calculations that show a very delicate stability of this isolated-chain state. As the vortex density increases along the chain there is a first-order transition to a buckled chain, and then the chain will expel vortices in a continuous transition to a composite-chain state. At low densities there is an instability towards clustering, due to a long-range attraction between the vortices on the chain, and at very low densities it becomes energetically favorable to form a tilted chain, which may explain the sudden disappearance of vortices along the chains seen in recent experiments.
Physical Review Letters | 1998
Matthew J. W. Dodgson; V. B. Geshkenbein; Henrik Nordborg; G. Blatter
We derive expressions for the jumps in entropy and magnetization characterizing the first-order melting transition of a flux line lattice. In our analysis we account for the temperature dependence of the Landau parameters and make use of the proper shape of the melting line as determined by the relative importance of electromagnetic and Josephson interactions. The results agree well with experiments on anisotropic Y
Physical Review Letters | 2001
Malek Georg Bou-Diab; Matthew J. W. Dodgson; G. Blatter
_1
Physical Review Letters | 1999
Matthew J. W. Dodgson; V. B. Geshkenbein; G. Blatter
Ba
Physical Review B | 1998
Matthew J. W. Dodgson; V. B. Geshkenbein; Henrik Nordborg; G. Blatter
_2
Physical Review Letters | 2006
M. Konczykowski; C.J. van der Beek; A. E. Koshelev; Vincent Mosser; Matthew J. W. Dodgson; P. H. Kes
Cu
Physica C-superconductivity and Its Applications | 2000
G. Blatter; Matthew J. W. Dodgson; V. B. Geshkenbein
_3
Physical Review Letters | 2007
M. Konczykowski; Cornelis Jacominus Van Der Beek; Alexei E. Koshelev; Vincent Mosser; Matthew J. W. Dodgson; Pieter H. Kes
O
Physical Review Letters | 2006
M. Konczykowski; C.J. van der Beek; A. E. Koshelev; Vincent Mosser; Matthew J. W. Dodgson; P. H. Kes; Cnrs-Umr
_{7-\delta}
Physica B-condensed Matter | 2000
Matthew J. W. Dodgson; V. B. Geshkenbein; G. Blatter
and layered Bi