Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2006-04-29
Phys. Rev. B 74, 205322 (2006)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
5 pages, 5 figures; published version, minor changes
Scientific paper
10.1103/PhysRevB.74.205322
Tunneling between two-dimensional electron layers with mutually correlated disorder potentials is studied theoretically. Due to this correlation, the diffusive eigenstates in different layers are almost orthogonal to each other. As a result, a peak in the tunnel I-V characteristics shifts towards small bias, V. This "protects" the peak against the interaction-induced smearing, since the relaxation rate near the Fermi level is low. If the correlation in disorder potentials is complete, the peak position and width are governed by the spin-orbit coupling in the layers; this coupling lifts the orthogonality of the eigenstates. Possibility to use inter-layer tunneling for experimental determination of weak intrinsic spin-orbit splitting of the Fermi surface is discussed.
Mishchenko Eugene G.
Raikh Mikhail E.
Zyuzin Vladimir A.
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