Mesoscopic charge-density-wave junctions | Zendy

Mark I. Visscher | Zendy; G. Bauer | Zendy

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Mesoscopic charge-density-wave junctions

Author(s) -

Mark I. Visscher,

G. Bauer

Publication year - 1996

Publication title -

physical review. b, condensed matter

Language(s) - English

Resource type - Journals

eISSN - 1095-3795

pISSN - 0163-1829

DOI - 10.1103/physrevb.54.2798

Subject(s) - mesoscopic physics , condensed matter physics , physics , charge density wave , superconductivity , phase (matter) , momentum (technical analysis) , charge (physics) , friedel oscillations , electron , charge density , quantum mechanics , finance , economics

We investigate theoretically charge-density waves ~CDW's! in mesoscopic heterostructures for the configu- ration where the one-dimensional chains are oriented normal to the interfaces. Based on Bogoliubov-de Gennes equations and suitable boundary conditions, ground state properties of phase coherent CDW systems are calculated in the mean-field approximation. It is shown that in a charge-density-wave/normal-metal/charge- density-wave junction the CDW condensates couple through the normal metal region by means of Friedel oscillations. Geometrical resonance effects are predicted. We relate the phase-dependent energy of the junction to a momentum current, carried by electron-hole pairs. The effects of pinning potentials at the interfaces are also considered. Finally, we discuss the analogies with superconductor and ferromagnet junctions. @S0163- 1829~96!07924-6#

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