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

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

1996-12-23

arxiv.org/abs/cond-mat/9612199v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, RevTeX, 2 postscript figures

Scientific paper

10.1103/PhysRevB.55.R16017

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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