Unusual magnetic quantum oscillations in organic metals at high magnetic fields

Authors
Wosnitza, J Wanka, S Hagel, J Qualls, JS Brooks, JS Harrison, H Balthes, E Schweitzer, D Schlueter, JA Geiser, U Mohtashame, J Winter, RW Gard, GL
Citation
J. Wosnitza et al., Unusual magnetic quantum oscillations in organic metals at high magnetic fields, PHYSICA B, 294, 2001, pp. 442-446
Citations number
18
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA B
ISSN journal
09214526 → ACNP
Volume
294
Year of publication
2001
Pages
442 - 446
Database
ISI
SICI code
0921-4526(200101)294:<442:UMQOIO>2.0.ZU;2-Z
Abstract
We report on Shubnikov-de Haas (SdH) and de Haas-van Alphen (dHvA) results for the highly two-dimensional (2D) organic superconductors kappa-(ET)(2)I- 3 (T-e = 3.5 K) and beta "-(ET)(2)SF5CH2CF2SO3 (T-c = 4.4 K). The SdH oscil lations of both materials show an apparent deviation from the well-understo od 2D dHvA signal at low temperatures and high magnetic fields. For kappa-( ET)(2)I-3, the mechanism leading to this behavior still needs to be clarifi ed. For beta "-(ET)(2)SF5CH2CF2SO3, an anomalous steady background part of the magnetoresistance seems to account for the observed discrepancies. (C) 2001 Elsevier Science B.V. All rights reserved.