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Dehaas-vanalphen Study of the Charge-transfer Salt Alpha-(bedt-ttf)(2)khg(scn)(4) in Pulsed Magnetic-fields of Up To 54 T

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Harrison, N. House, A. Deckers, I. Caulfield, J. Singleton, J. Day, P.

The de Haas-van Alphen effect has been measured in the organic conductor alpha-(BEDT-TTF)(2)KHg(SCN)(4) in pulsed magnetic fields of up to 54 T, temperatures down to 350 mK, and at three different angles. Analysis of the amplitude of the quantum oscillations within the framework of a two-dimensional Lifshitz-Kosevich model reveals that this material appears to be only fully transformed into the high-field state at fields above similar to 27 T, where the quasiparticle scattering rate is observed to be low. On entering the low-field state, the scattering rate is observed to increase dramatically. We also observe an apparent increase in the effective mass from similar to 1.5m(e) in the low-field state to similar to 2.7m(e) in the high-field state. The data at low fields are in accord with previous studies, but the nature of the higher harmonics of the de Haas-van Alphen oscillations at high fields appears to signify a departure from conventional Lifshitz-Kosevich behavior.

Document type Article de périodique (Journal article) – Article de recherche
Publication date 1995
Language Anglais
Journal information "Physical Review. B, Condensed Matter" - Vol. 52, no. 8, p. 5584-5591 (1995)
Peer reviewed yes
Publisher American Physical Soc (College Pk)
issn 0163-1829
Publication status Publié
Affiliation UCL
Links
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Bibliographic reference Harrison, N. ; House, A. ; Deckers, I. ; Caulfield, J. ; Singleton, J. ; et. al. Dehaas-vanalphen Study of the Charge-transfer Salt Alpha-(bedt-ttf)(2)khg(scn)(4) in Pulsed Magnetic-fields of Up To 54 T. In: Physical Review. B, Condensed Matter, Vol. 52, no. 8, p. 5584-5591 (1995)
Permanent URL http://hdl.handle.net/2078.1/47866