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Many-body blockade of resonant tunneling of two-dimensional electrons
Lok, J G S; Geim, A K; Maan, J C; Eaves, L; Nogaret, A; Main, P C; Henini, M
Physical Review B. 1997;56(3):1053-1056.
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Abstract
In high magnetic fields tunneling of two-dimensional electrons requires an extra energy to overcome an effective barrier due to electron-electron interaction. This barrier is clearly visible as a shift of the tunnel resonance to higher biases. The filling factor nu=1 marks a surprisingly rapid transition between low-field (quadratically developing shift) and high-field (saturation) regimes. At low temperatures, the many-body shift decays linearly with increasing temperature, which can be attributed to coupling of a tunneling electron to phononlike excitations in the correlated electron system.
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