Umklapp-assisted electron transport oscillations in metal superlattices

S. I. Kulinich; L. Y. Gorelik; S. A. Gredeskul; R. I. Shekhter; M. Jonson

doi:10.1103/PhysRevB.85.184202

Umklapp-assisted electron transport oscillations in metal superlattices

S. I. Kulinich, L. Y. Gorelik, S. A. Gredeskul, R. I. Shekhter, M. Jonson

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Abstract

We consider a superlattice of parallel metal tunnel junctions with a spatially nonhomogeneous probability for electrons to tunnel. In such structures tunneling can be accompanied by electron scattering that conserves energy but not momentum. In the special case of a tunneling probability that varies periodically with period a in the longitudinal direction, i.e., perpendicular to the junctions, electron tunneling is accompanied by umklapp scattering, where the longitudinal momentum changes by a multiple of h/a. We predict that as a result a sequence of metal-insulator transitions can be induced by an external electric or magnetic field as the field strength is increased.

Original language	English
Article number	184202
Number of pages	6
Journal	Physical Review B: Condensed Matter and Materials Physics
Volume	85
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevB.85.184202
Publication status	Published - 3 May 2012

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abstract = "We consider a superlattice of parallel metal tunnel junctions with a spatially nonhomogeneous probability for electrons to tunnel. In such structures tunneling can be accompanied by electron scattering that conserves energy but not momentum. In the special case of a tunneling probability that varies periodically with period a in the longitudinal direction, i.e., perpendicular to the junctions, electron tunneling is accompanied by umklapp scattering, where the longitudinal momentum changes by a multiple of h/a. We predict that as a result a sequence of metal-insulator transitions can be induced by an external electric or magnetic field as the field strength is increased.",

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AU - Gorelik, L. Y.

AU - Gredeskul, S. A.

AU - Shekhter, R. I.

AU - Jonson, M.

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AB - We consider a superlattice of parallel metal tunnel junctions with a spatially nonhomogeneous probability for electrons to tunnel. In such structures tunneling can be accompanied by electron scattering that conserves energy but not momentum. In the special case of a tunneling probability that varies periodically with period a in the longitudinal direction, i.e., perpendicular to the junctions, electron tunneling is accompanied by umklapp scattering, where the longitudinal momentum changes by a multiple of h/a. We predict that as a result a sequence of metal-insulator transitions can be induced by an external electric or magnetic field as the field strength is increased.

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