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VOLUME 86 (2007) | ISSUE 10 | PAGE 775
Existence of two-dimensional closed orbits and delocalized carriers in the spin-ordered state of quasi one-dimensional (TMTSF)2PF6
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.