Shape Dependence of Ballistic Transport in Mesoscopic Systems
Shape dependence of ballistic transport is investigated in mesoscopic systems within the framework of single electron approximation. In the quasi-one-dimensional quantum wire with a wide or a bent part, there appears inter-channel coupling which produces various pattern behaviours in the conductance. In the quantum wire with a small ring geometry, the inter-channel coupling leads to the periodic behaviour of the conductance as a function of the magnetic field, in addition to the oscillation originating from the intra-channel coupling. In the system of semi-infinite two-dimensional region with two quantum wires as an injector and a collector of electrons, the pattern behaviour of the observed electron focusing spectra can be explained qualitatively by the wavelike nature of the electron.
Unable to display preview. Download preview PDF.
- 4.A. Nakamura and A. Okiji, J. Phys. Soc. Jpn. 60 (1991) 1873.Google Scholar
- 5.A. Okiji, H. Kasai and A. Nakamura, Prog. Theor. Phys. Suppl. (1992) in pressGoogle Scholar
- 7.K. Vacek, H. Kasai and A. Okiji, J. Phys. Soc. Jpn. 61 (1992) No.1Google Scholar
- 8.A. Okiji, H. Kasai and K. Mitsutake, submitted to J. Phys. Soc. Jpn.Google Scholar
- 10.A. Okiji, N. Negishi and A. Nakamura, submitted to J. Phys. Soc. Jpn.Google Scholar
- 12.H. van Houten, C. W. Beenakker, J. G. Williamson, M. E. I. Broekaart, P. H. M. van Loosdrecht, B. J. van Wees, J. E. Mooij, C. T. Foxon and J. J. Harris, Phys. Rev. B39 (1989) 8556.Google Scholar
- 13.F. Soles and M. Macucci, Phys. Rev. B41 (1990) 10354.Google Scholar
- 14.R. L. Schult, D. G. Ravenhall and H. W. Wyld, Phys. Rev. B39 (1989) 5476.Google Scholar