Two-dimensional metal in a parallel magnetic field

Details Two-dimensional metal in a parallel magnetic field Two-dimensional metal in a parallel magnetic field

2001-10-26

arxiv.org/abs/cond-mat/0110571v1

Phys. Rev. Lett. 88, 166803 (2002)

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

10.1103/PhysRevLett.88.166803

We have investigated the effect of an in plane parallel magnetic field (B_||) on two high mobility metallic-like dilute two-dimensional hole gas (2DHG) systems in GaAs quantum wells. The experiments reveal that, while suppressing the magnitude of the low temperature resistance drop, B_|| does not affect E_a, the characteristic energy scale of the metallic resistance drop. The field B_c at which the metallic-like resistance drop vanishes is dependent on both the width of quantum well and the orientation of B_||. It is unexpected that E_a is unaffected by B_|| up to Bc depite that the Zeeman energy at B_c is roughly equal to E_a.

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