M.-A. Vachon
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
M.-A. Vachon has a total of 5 co-authors. Here are the top co-authors by number of shared publications:
J. M. Cline
1 shared publicationM. Juneau
1 shared publicationR. MacKenzie
1 shared publication- Richard MacKenzie
Université de Montréal, Complexe des sciences
1 shared publication - U. F. Wichoski
Laboratoire René-J.-A.-Lévesque, Université de Montréal, C.P. 6128, Succ. Centre-ville, Montréal, Québec, Canada H3C 3J7
1 shared publication
Latest Publications
- 29 May 2003
- Published by American Physical Society (APS) in Physical Review D
- Vol. 67 (10) , 105024
Interaction between vortices in models with two order parameters
The interaction energy and force between widely separated strings is analyzed in a field theory having applications to superconducting cosmic strings, the SO(5) model of high-temperature superconductivity, and solitons in nonlinear optics. The field theory has two order parameters, one of which is broken in the vacuum (giving rise to strings), the other of which is unbroken in the vacuum but which could nonetheless be broken in the core of the string. If this does occur, there is an effect on the energetics of widely separated strings. This effect is important if the length scale of this second order parameter is longer than that of the other fields in the problem.
- 29 May 2003
- Published by American Physical Society (APS) in Physical Review D
- Vol. 67 (10) , 105024
Interaction between vortices in models with two order parameters
The interaction energy and force between widely separated strings is analyzed in a field theory having applications to superconducting cosmic strings, the SO(5) model of high-temperature superconductivity, and solitons in nonlinear optics. The field theory has two order parameters, one of which is broken in the vacuum (giving rise to strings), the other of which is unbroken in the vacuum but which could nonetheless be broken in the core of the string. If this does occur, there is an effect on the energetics of widely separated strings. This effect is important if the length scale of this second order parameter is longer than that of the other fields in the problem.
- 4 April 2002
- Published by American Physical Society (APS) in Physical Review B
- Vol. 65 (14) , 140512
Vortex lattice stability in the SO(5) model
We study the energetics of superconducting vortices in the SO(5) model for high- materials proposed by Zhang. We show that for a wide range of parameters normally corresponding to type-II superconductivity, the free energy per unit flux of a vortex with m flux quanta is a decreasing function of m, provided the doping is close to its critical value. This implies that the Abrikosov lattice is unstable, a behavior typical of type-I superconductors. For dopings far from the critical value, can become very flat, indicating a less rigid vortex lattice, which would melt at a lower temperature than expected for a BCS superconductor.- 4 April 2002
- Published by American Physical Society (APS) in Physical Review B
- Vol. 65 (14) , 140512
Vortex lattice stability in the SO(5) model
We study the energetics of superconducting vortices in the SO(5) model for high- materials proposed by Zhang. We show that for a wide range of parameters normally corresponding to type-II superconductivity, the free energy per unit flux of a vortex with m flux quanta is a decreasing function of m, provided the doping is close to its critical value. This implies that the Abrikosov lattice is unstable, a behavior typical of type-I superconductors. For dopings far from the critical value, can become very flat, indicating a less rigid vortex lattice, which would melt at a lower temperature than expected for a BCS superconductor.