Quantum Hall Transitions in (TMTSF)$_2$PF$_6$

Details Quantum Hall Transitions in (TMTSF)$_2$PF$_6$ Quantum Hall Transitions in (TMTSF)$_2$PF$_6$

1996-06-28

arxiv.org/abs/cond-mat/9606212v2

Physics

Condensed Matter

10 pages, RevTeX, 4 PostScript figures

Scientific paper

10.1103/PhysRevB.54.16413

We have studied the temperature dependence of the integer quantum Hall transitions in the molecular crystal (TMTSF)$_2$PF$_6$. We find that the transition width between the quantum Hall plateaus does not exhibit the universal power-law scaling behavior of the integer quantum Hall effect observed in semiconducting devices. Instead, the slope of the $\rho_{xy}$ risers, $d\rho_{xy}/dB$, and the (inverse) width of the $\rho_{xx}$ peaks, $(\Delta B)^{-1}$, show a BCS-like energy gap temperature dependence. We discuss these results in terms of the field-induced spin-density wave gap and order parameter of the system.

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