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VOLUME 86 | ISSUE 10 | PAGE 775
Existence of two-dimensional closed orbits and delocalized carriers in the spin-ordered state of quasi one-dimensional (TMTSF)2PF6
A. V. Kornilov, V. M. Pudalov, K. Ishida+, T. Mito*, J. S. Qualls^\nabla

P.N. Lebedev Physical Institute RAS, 119991 Moscow, Russia
+Department of Physics, Kyoto University, Kyoto 606-8502 Japan
*Department of Physics, Kobe University, Kobe 657-8501 Japan
^\nablaSonoma State University, Rohnert Park, CA 94928 USA


PACS: 73.43.-f, 75.30.Fv
Abstract
We report studies of the magnetoresistance in the spin-ordered state of the quasi one-dimensional (TMTSF)2PF6. We have found that both frequency and anisotropy of the magnetoresistance oscillations are independent of temperature; this proves temperature independence of the geometry of two-dimensional closed contours at the Fermi level. On the other hand, the oscillation amplitude decay as temperature decreases, the latter result indicates depopulation of the closed contours in the T=0 limit. We propose an explanation for the above seemingly controversial results.


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