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No Access Submitted: 18 May 1993 Accepted: 14 June 1993 Published Online: 17 August 1998

  • Waveguide effects in quantum wires with double‐bend discontinuities

Journal of Applied Physics 74, 4590 (1993); https://doi.org/10.1063/1.354377
J. C. Wu and M. N. Wybourne
  • Department of Physics, University of Oregon, Eugene, Oregon 97403
    • A. Weisshaar and S. M. Goodnick
  • Department of Electrical and Computer Engineering, Oregon State University, Corvallis, Oregon 97331
    • more...View Contributors
    • J. C. Wu
    • M. N. Wybourne
    • A. Weisshaar
    • S. M. Goodnick
    ABSTRACT
    Quantum waveguide structures with double‐bend discontinuities were fabricated in modulation‐doped AlGaAs/GaAs heterojunctions using a split‐gate technique. The low field ac‐conductance measurements at 50 mK show resonant peaks in the lowest quantized conductance plateau. The number of peaks increases with the effective cavity length of the double bend. This observation may be explained in terms of the allowed standing waves in the bend cavity, which is consistent with the theoretical predictions of a generalized mode‐matching theory. Beyond the simple waveguide behavior, we find that the measured peak conductivity decreases as the channel length increases, which is believed to be associated with elastic scattering due to channel inhomogeneities. Magnetic field studies show that the resonance features are suppressed as the cyclotron radius approaches the one‐dimensional channel width.

    REFERENCES
    Section:
    Previous sectionNext section

    1. 1. D. A. Wharam, T. J. Thornton, R. Newbury, M. Pepper, H. Ahmed, J. E. F. Frost, D. G. Hasko, D. C. Peacock, D. A. Ritchie, and G. A. C. Jones, J. Phys. C 21, L209 (1988). Google ScholarCrossref, ISI
    2. 2. B. J. van Wees, H. vanHouten, C. W. J. Beenakker, J. G. Williamson, L. P. Kouwenhoven, D. van der Marel, and C. T. Foxon, Phys. Rev. Lett. 60, 848 (1988). Google ScholarCrossref, ISI
    3. 3. L. P. Kouwenhoven, F. W. J. Hekking, B. J. van Wees, and C. P. J. M. Harmans, Phys. Rev. Lett. 65, 361 (1990). Google ScholarCrossref, ISI
    4. 4. U. Meirav, M. A. Kastner, and S. J. Wind, Phys. Rev. Lett. 65, 771 (1990). Google ScholarCrossref, ISI
    5. 5. A. T. Johnson, L. P. Kouwenhoven, W. de Jong, N. C. van der Vaart, and C. J. P. M. Harmans, Phys. Rev. Lett. 69, 1592 (1992). Google ScholarCrossref, ISI
    6. 6. P. L. McEuen, B. W. Alpehnaar, and R. G. Wheeler, Surf. Sci. 229, 312 (1990). Google ScholarCrossref
    7. 7. C. G. Smith, M. Pepper, H. Ahmed, J. E. F. Frost, D. G. Hasko, R. Newbury, D. C. Peacock, D. A. Ritchie, and G. A. C. Jones, Surf. Sci. 228, 287 (1990). Google Scholar
    8. 8. J. C. Wu, M. N. Wybourne, W. Yindeepol, A. Weisshaar, and S. M. Goodnick, Appl. Phys. Lett. 59, 102 (1991). Google ScholarScitation
    9. 9. W. Yindeepol, A. Chin, A. Weisshaar, S. M. Goodnick, J. C. Wu, and M. N. Wybourne, Nanostructure Physics and Fabrication, edited by M. A. Reed and W. P. Kirk (Academic, New York, 1992), p. 139. Google Scholar
    10. 10. R. Behringer, G. Timp, H. U. Baranger, and J. E. Cunningham, Phys. Rev. Lett. 66, 930 (1991). Google ScholarCrossref
    11. 11. C. C. Eugster and J. A. del Alamo, Phys. Rev. Lett. 67, 3586 (1991). Google ScholarCrossref, ISI
    12. 12. A. Weisshaar, J. Lary, S. M. Goodnick, and V. K. Tripathi, Appl. Phys. Lett. 55, 2114 (1989). Google ScholarScitation, ISI
    13. 13. A. Weisshaar, J. Lary, S. M. Goodnick, and V. K. Tripathi, J. Appl. Phys. 70, 355 (1991). Google ScholarScitation, ISI
    14. 14. G. Timp, R. Behringer, S. Sampere, J. E. Cunningham, and R. E. Howard, Nanostructure Physics and Fabrication, edited by M. A. Reed and W. P. Kirk (Academic, New York, 1989), p. 331. Google Scholar
    15. 15. R. J. Brown, M. J. Kelly, R. Newbury, M. Pepper, B. Miller, H. Ahmed, D. G. Hasko, D. C. Peacock, D. A. Ritchie, J. E. F. Frost, and G. A. C. Jones, Solid-State Electron. 32, 1179 (1989). Google ScholarCrossref
    16. 16. J. C. Nabity and M. N. Wybourne, Rev. Sci. Instrum. 60, 27 (1989); Google ScholarScitation
      J. C. Wu, Dissertation, University of Oregon, December 1992. , Google Scholar
    17. 17. L. Martin-Moreno and C. G. Smith, J. Phys. Condens. Matter 1, 5421 (1989). Google ScholarCrossref
    18. 18. S. Y. Chou and Y. Wang, Appl. Phys. Lett. 61, 1591 (1992). Google ScholarScitation
    19. 19. R. Landauer, Philos. Mag. 21, 863 (1970). Google ScholarCrossref, ISI
    20. 20. P. W. Anderson, D. J. Thouless, E. Abrahams, and D. S. Fisher, Phys. Rev. B 22, 3519 (1980). Google ScholarCrossref, ISI
    21. 21. D. S. Fisher and P. A. Lee, Phys. Rev. B 23, 6851 (1981). Google ScholarCrossref, ISI
    22. 22. M. Büttiker, Phys. Rev. B 33, 3020 (1986). Google ScholarCrossref, ISI
    23. 23. Y. Imry, in Directions of Condensed Matter Physics, edited by G. Grinstein and G. Mazenko (World Scientific, Singapore, 1986), Vol. 1, p. 101. Google Scholar
    24. 24. S. Datta, Superlatt. Microstruct. 6, 83 (1989). Google ScholarCrossref
    25. 25. S. Das Sarma and B. Vinter, Phys. Rev. B 24, 549 (1981). Google ScholarCrossref
    26. 26. A. Weisshaar, S. M. Goodnick, and V. K. Tripathi, IEEE Trans. Microwave Theory Tech. 40, 2200 (1992). Google ScholarCrossref
    27. 27. R. F. Harrington, Field Computation by Moment Methods (MacMillan, New York, 1968). Google Scholar
    28. 28. J. M. Kinaret and P. Lee, Phys. Rev. B 43, 3847 (1991). Google ScholarCrossref
    29. 29. J. L. Pichard and G. André, Europhys. Lett. 2, 477 (1986). Google ScholarCrossref
    30. 30. H. Akera and T. Ando, Phys. Rev. B 43, 11676 (1991). Google ScholarCrossref
    31. 31. J. A. Nixon, J. H. Davies, and J. R. Barker, in Ref. 14, p. 123. Google Scholar
    1. © 1993 American Institute of Physics.

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