High-field magnetoresistance of the Bechgaard salt (TMTSF)[sub 2]NO[sub 3]: Quantum oscillations in the spin-density-wave state and phase transitions
- Service National des Champs Magnetiques Pulses (CNRS-UMS 819), Laboratoire de Physique des Solides (CNRS URA 074), Complexe Scientifique de Rangueil, 31077 Toulouse (France)
- Laboratoire de Chimie Organique Structurale, Universite des Sciences et Techniques du Languedoc, place Eugene Bataillon, 34095 Montpellier Cedex 5 (France)
The transverse magnetoresistance of the Bechgaard salt (TMTSF)[sub 2]NO[sub 3] has been measured up to 37 T at ambient pressure in the temperature range from 2 to 77 K. When the magnetic field is parallel to the lowest conductivity direction [ital c][sup *] and for temperatures higher than [similar to]12 K, the data can be accounted for by a power law, the exponent of which decreases as the anion ordering takes place. At lower temperatures, the magnetic field increases the spin-density-wave (SDW) transition temperature, in overall agreement with theoretical predictions for the imperfect-nesting case. Two oscillation series, both linked to the SDW state, have been observed in the 2--10 K range. Their temperature-independent frequencies, measured from 2 to 8 K, are at (63[plus minus]2) and (248[plus minus]5) T, respectively. These oscillations have been studied (at 4.2 K) as a function of the field direction. They were found to deviate from the two-dimensional model since, in particular, their behavior differs according to whether the field is tilted on one side of the [ital c][sup *] direction or on the other. The oscillation data are discussed on the basis of recent calculations of Yakovenko.
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 6903779
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Vol. 50:17; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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