“School of Physics”

Back to Papers Home
Back to Papers of School of Physics

Paper   IPM / P / 6728
School of Physics
  Title:   Melting of Flux Lines in An Alternating Parallel Current
  Author(s): 
1.  M. Kohandel
2.  M. Kardar
  Status:   Published
  Journal: Phys. Rev. B
  No.:  48
  Vol.:  59
  Year:  1999
  Pages:   9637-9641
  Supported by:  IPM
  Abstract:
We use a Langevin equation to examine the dynamics and fluctuations of a flux line (FL) in the presence of an alternating longitudinal current J||( omega ). The magnus and dissipative forces are equated to those resulting from line tension, confinement in a harmonic cage by neighboring FLs, parallel current, and noise. The resulting mean-square FL fluctuations are calculated exactly, and a Lindemann criterion is then used to obtain a nonequilibrium "phase diagram" as a function of the magnitude and frequency of J||( omega ). For zero frequency, the melting temperature of the mixed phase (a lattice, or the putative "Bose" or "Bragg glass") vanishes at a limiting current. However, for any finite frequency, there is a nonzero melting temperature.

Download TeX format
back to top
Clients Logo
Clients Logo
Clients Logo
Clients Logo
Clients Logo
Clients Logo
Clients Logo
Clients Logo
Clients Logo
Clients Logo
scroll left or right