Fermi surface and physical properties of (TMTSF)2NO3

W. Kang, L. Balicas, K. Behnia, D. Jérome, M. Ribault, J. M. Fabre

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We studied the Fermi surface of the organic conductor (TMTSF)2NO3 through the measurements of magnetic quantum oscillations. Well defined Shuvnikov-de Haas(SdH) oscillations with frequency of ca. 60T can be observed below 8K and above 6T at the ambient pressure. Under a pressure of 8kbar, different oscillations with frequency of ca. 180T is observed above 10T at 450mK. Electron structure at low temperature seems strongly modified upon application of pressure which may explain the absence of superconductivity and the field-induced spin-density waves. The angular magnetoresistance could not be fit neither by Yamaji's model nor by Lebed's.

Original languageEnglish
Pages (from-to)755-756
Number of pages2
JournalSynthetic Metals
Issue number1-3
StatePublished - 15 Mar 1995

Bibliographical note

Funding Information:
At the ambient pressure and at 4.2K, the oscillations are visible above 6T. They are superposed on the slowly varying background magnetoresistance and represents several percent of total magnetoresistance. Orientation dependence of the fundamental frequency and the oscillation amplitude at 4.2K are summarized in Fig. l(a) and (b). The frequency does not follow the general 1/cos law. Instead it had a broad minimum around +10 ° and increases much faster at right side. The fundamental frequency of 60T corresponds well with the already published results. The overall behavior of the fundamental frequency suggests a highly distorted closed cylindrical Fermi surface. This point of view is sup- o This work has been partially supported by the KOSEF-CNRS exchange program and the Basic Science Research Institute Program, Ministry of Education, 1994, Project No. BSRI-94-2428.


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