Physics – Condensed Matter
Scientific paper
1997-12-17
Phys. Rev. Lett. 80, 3618 (1998)
Physics
Condensed Matter
4 pages, latex, 3 figures
Scientific paper
10.1103/PhysRevLett.80.3618
We study the effect of umklapp scattering on the magnetic-field-induced spin-density-wave phases, which are experimentally observed in the quasi-one-dimensional organic conductors of the Bechgaard salts family. Within the framework of the quantized nesting model, we show that umklapp processes may naturally explain sign reversals of the quantum Hall effect (QHE) observed in these conductors. Moreover, umklapp scattering can change the polarization of the spin-density wave (SDW) from linear (sinusoidal SDW) to circular (helicoidal SDW). The QHE vanishes in the helicoidal phases, but a magnetoelectric effect appears. These two characteristic properties may be utilized to detect the magnetic-field-induced helicoidal SDW phases experimentally.
Dupuis N.
Yakovenko Victor M.
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