Anisotropy of zero-bias diffusive anomalies for different orientations of an external magnetic field

Details Anisotropy of zero-bias diffusive anomalies for different orientations of an external magnetic field Anisotropy of zero-bias diffusive anomalies for different orientations of an external magnetic field

1997-04-23

arxiv.org/abs/cond-mat/9704195v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

12 pages, LaTeX format, 2 figures (available from the authors), accepted for publication by PRB

Scientific paper

10.1103/PhysRevB.56.1456

We consider the influence of the electron-electron interaction on the nonlinearity of the current-voltage characteristic of the tunnel junction at low bias (diffusive anomaly) in the presence of the classical magnetic field. We present the theory of a new phenomenon which manifests itself in the strong anisotropy of a diffusive anomaly for different orientations of the magnetic field with respect to the interface of the tunnel junction. The nonlinear differential tunneling conductance has a universal magnetic field dependence, so that only the magnetic field component perpendicular to the interface is involved. In particular, when the magnetic field is parallel to the interface, the I-V characteristic does not depend on the value of the magnetic field.

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