publication . Preprint . 2001

Separately contacted edge states: A new spectroscopic tool for the investigation of the quantum Hall effect

Wuertz, A.; Wildfeuer, R.; Lorke, A.; Deviatov, E. V.; Dolgopolov, V. T.;
Open Access English
  • Published: 10 Aug 2001
Abstract
Using an innovative combination of a quasi-Corbino sample geometry and the cross-gate technique, we have developed a method that enables us to separately contact single edge channels in the quantum Hall regime and investigate equilibration among them. Performing 4-point resistance measurements, we directly obtain information on the energetic and geometric structure of the edge region and the equilibration-length for current transport across the Landau- as well as the spin-gap. Based on an almost free choice in the number of participating edge channels and their interaction-length a systematic investigation of the parameter-space becomes possible.
Subjects
free text keywords: Condensed Matter - Mesoscale and Nanoscale Physics
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33 references, page 1 of 3

[νU6 − gU3 − T36U3 − T76U7]

[1] B. I. Halperin, Phys. Rev. B 25, 2185 (1982).

[2] R. J. Haug, Semicond. Sci. Technol. 8, 131-153 (1993).

[3] A. H. MacDonald, P. Strˇeda, Phys. Rev. B 29, 1616 (1984).

[4] M. Bu¨ttiker, Y. Imry, R. Landauer and S. Pinhas, Phys. Rev. B 31, 6207 (1985).

[5] M. Bu¨ttiker, Phys. Rev. B 38, 9375 (1988).

[6] D. B. Chklovskii, B. I. Shklovskii and L. I. Glazman, Phys. Rev. B 46, 4026 (1992).

[7] D. B. Chklovskii, K. A. Matveev and B. I. Shklovskii, Phys. Rev. B 47, 12605 (1993).

[8] N. B. Zhitenev, R. J. Haug, K. v. Klitzing and K. Eberl, Phys. Rev. B 51, 17820 (1995).

[9] S. W. Hwang, D. C. Tsui and M. Shayegan, Phys. Rev. B 48, 8161 (1993).

[10] S. Takaoka, K. Oto, H. Kurimoto and K. Murase, K. Gamo and S. Nishi, Phys. Rev. Lett. 72, 3080 (1994).

[11] R. Merz, F. Keilmann, R. J. Haug and K. Ploog, Phys. Rev. Lett. 70, 651 (1993).

[12] A. Lorke, J. P. Kotthaus, J. H. English and A. C. Gossard, Phys. Rev. B 53, 1054 (1996).

[13] K. Hirakawa et al., The Physics of Semiconductors, M. Scheffler and R. Zimmermann, Ed. World Scientific, Singapore, 1996, p. 2543.

[14] N. B. Zhitenev, R. J. Haug, K. v. Klitzing and K. Eberl, Phys. Rev. Lett. 71, 2292 (1993).

33 references, page 1 of 3
Abstract
Using an innovative combination of a quasi-Corbino sample geometry and the cross-gate technique, we have developed a method that enables us to separately contact single edge channels in the quantum Hall regime and investigate equilibration among them. Performing 4-point resistance measurements, we directly obtain information on the energetic and geometric structure of the edge region and the equilibration-length for current transport across the Landau- as well as the spin-gap. Based on an almost free choice in the number of participating edge channels and their interaction-length a systematic investigation of the parameter-space becomes possible.
Subjects
free text keywords: Condensed Matter - Mesoscale and Nanoscale Physics
Download from
33 references, page 1 of 3

[νU6 − gU3 − T36U3 − T76U7]

[1] B. I. Halperin, Phys. Rev. B 25, 2185 (1982).

[2] R. J. Haug, Semicond. Sci. Technol. 8, 131-153 (1993).

[3] A. H. MacDonald, P. Strˇeda, Phys. Rev. B 29, 1616 (1984).

[4] M. Bu¨ttiker, Y. Imry, R. Landauer and S. Pinhas, Phys. Rev. B 31, 6207 (1985).

[5] M. Bu¨ttiker, Phys. Rev. B 38, 9375 (1988).

[6] D. B. Chklovskii, B. I. Shklovskii and L. I. Glazman, Phys. Rev. B 46, 4026 (1992).

[7] D. B. Chklovskii, K. A. Matveev and B. I. Shklovskii, Phys. Rev. B 47, 12605 (1993).

[8] N. B. Zhitenev, R. J. Haug, K. v. Klitzing and K. Eberl, Phys. Rev. B 51, 17820 (1995).

[9] S. W. Hwang, D. C. Tsui and M. Shayegan, Phys. Rev. B 48, 8161 (1993).

[10] S. Takaoka, K. Oto, H. Kurimoto and K. Murase, K. Gamo and S. Nishi, Phys. Rev. Lett. 72, 3080 (1994).

[11] R. Merz, F. Keilmann, R. J. Haug and K. Ploog, Phys. Rev. Lett. 70, 651 (1993).

[12] A. Lorke, J. P. Kotthaus, J. H. English and A. C. Gossard, Phys. Rev. B 53, 1054 (1996).

[13] K. Hirakawa et al., The Physics of Semiconductors, M. Scheffler and R. Zimmermann, Ed. World Scientific, Singapore, 1996, p. 2543.

[14] N. B. Zhitenev, R. J. Haug, K. v. Klitzing and K. Eberl, Phys. Rev. Lett. 71, 2292 (1993).

33 references, page 1 of 3
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