HIGH-FIELD SHUBNIKOV-DEHAAS EFFECT IN THE ORGANIC SUPERCONDUCTOR ALPHA-(BEDT-TTF)(2)NH4HG(SCN)(4)

Authors
SANDHU PS ATHAS GJ BROOKS JS HAANAPPEL EG GOETTEE JD RICKEL DW TOKUMOTO M KINOSHITA N KINOSHITA T TANAKA Y
Citation
Ps. Sandhu et al., HIGH-FIELD SHUBNIKOV-DEHAAS EFFECT IN THE ORGANIC SUPERCONDUCTOR ALPHA-(BEDT-TTF)(2)NH4HG(SCN)(4), Surface science, 362(1-3), 1996, pp. 913-917
Citations number
17
Categorie Soggetti
Chemistry Physical
Journal title
Surface science → ACNP
ISSN journal
00396028
Volume
362
Issue
1-3
Year of publication
1996
Pages
913 - 917
Database
ISI
SICI code
0039-6028(1996)362:1-3<913:HSEITO>2.0.ZU;2-X
Abstract
We report Shubnikov-de Haas (SdH) measurements on the quasi-two dimens ional organic superconductor alpha-(BEDT-TTF)(2)NH4Hg(SCN)(4) in pulse d fields up to 50 T. Analysis of the field and temperature-dependence of the oscillations reveals several unusual features, such as a held-d ependent effective mass parameter, non-linear Dingle plots and an anom alously large harmonic ratio. These results suggest departures from th e Lifshitz-Kosevich formalism, arising from the highly two-dimensional nature of the material.