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VOLUME 61 (1995) | ISSUE 6 | PAGE 508
Quantum capacitance of a tunnel structure due to finite tunneling times
The spectrum of low-frequency plasma waves in a semiconductor-funnel junction)-semiconductor structure is calculated. The impedance of the structure is also calculated. The finite transmission of the barriers and the nonzero time it takes electrons to tunnel through the barrier are taken into account. The capacitance of the junction has a significant quantum contribution, which is proportional to the phase tunneling time. This contribution does not vanish even in the limit of an opaque barrier. © 1995 American Institute of Physics.