| Issue |
Europhys. Lett.
Volume 66, Number 4, May 2004
|
|
|---|---|---|
| Page(s) | 579 - 584 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2004-10017-9 | |
| Published online | 01 May 2004 | |
Phase coherence and the Nernst effect at magic angles in organic conductors
Department of Physics, Princeton University - Princeton, NJ 08544, USA
Received:
1
March
2004
Accepted:
17
March
2004
A giant Nernst signal was recently observed for fields near
crystallographic directions in 
. Such
large Nernst signals are most naturally associated with the
motion of pancake vortices. We propose a model in which
phase coherence is destroyed throughout the sample except in
planes closely aligned with the applied field 
. A
small tilt above or below the plane changes the direction
and density of the penetrating vortices and leads to a
Nernst signal that varies with the tilt angle of as
observed. The resistance notches at magic angles are
understood in terms of flux-flow dissipation from
field-induced vortices.
PACS: 74.20.-z – Theories and models of superconducting state / 74.70.Kn – Organic superconductors / 72.15.Jf – Thermoelectric and thermomagnetic effects
© EDP Sciences, 2004
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