Issue |
Europhys. Lett.
Volume 66, Number 2, April 2004
|
|
---|---|---|
Page(s) | 178 - 184 | |
Section | General | |
DOI | https://doi.org/10.1209/epl/i2003-10204-2 | |
Published online | 01 April 2004 |
Non-Hermitian Luttinger liquids and vortex physics
1
Lyman Laboratory, Harvard University - Cambridge, MA 02138, USA
2
Department of Physics, Boston University - Boston, MA 02215, USA
3
Sektion Physik, Universität München - Theresienstr. 37 D-80333 München, Germany
Received:
19
November
2003
Accepted:
6
February
2004
We study the effect of a single line defect on vortex
filaments oriented parallel to the surface of a thin planar
high- superconductor. When the applied field is
tilted relative to the line defect, the physics is
described by a non-Hermitian Luttinger liquid of
interacting quantum bosons in one spatial dimension with a point
defect. With a combination of analytic and numerical methods we
uncover a delicate interplay between enhancement of pinning due
to Luttinger-liquid effects and depinning due to the tilted
magnetic field. Interactions dramatically affect the transverse
magnetization when the Luttinger-liquid parameter
.
PACS: 05.30.Jp – Boson systems / 72.15.Rn – Localization effects (Anderson or weak localization) / 74.25.Qt – Vortex lattices, flux pinning, flux creep
© EDP Sciences, 2004
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