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Transverse Pseudospin Susceptibility and Tunneling Parameters of Double Layer Electron Gas Systems

L. Swierkowski·A. H. MacDonald
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Abstract

The subbands of weakly coupled double-layer two dimensional electron gas systems consist of narrowly spaced pairs whose corresponding wavefunctions are symmetric and antisymmetric combinations of isolated layer subband wavefunctions. The energetic spacing within a pair is 2t where t is the interlayer tunneling amplitude. t is an important parameter in modeling these systems and, if interactions could be neglected, it would be proportional to beating frequencies seen in weak-field magnetic oscillations experiments and therefore readily measurable. We point out that interactions alter the beating frequency. We discuss similarities and differences between this effect and exchange-correlation enhanced spin-splitting.

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L. Swierkowski, A. H. MacDonald. 1996-12-23. Transverse Pseudospin Susceptibility and Tunneling Parameters of Double Layer Electron Gas Systems. https://doi.org/10.1103/physrevb.55.r16017

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