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Article overview
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Composite Fermions in Modulated Structures: Transport and Surface Acoustic Waves | Felix von Oppen
; Ady Stern
; Bertrand I. Halperin
; | Date: |
3 Dec 1997 | Journal: | Phys. Rev. Lett. 80, 4494 (1998) | Subject: | Mesoscopic Systems and Quantum Hall Effect; Strongly Correlated Electrons | cond-mat.mes-hall cond-mat.str-el | Affiliation: | Heidelberg), Ady Stern (Weizmann), and Bertrand I. Halperin (Harvard | Abstract: | Motivated by a recent experiment of Willett et al. [Phys. Rev. Lett. 78, 4478 (1997)], we employ semiclassical composite-fermion theory to study the effect of a periodic density modulation on a quantum Hall system near Landau level filling factor nu=1/2. We show that even a weak density modulation leads to dramatic changes in surface-acoustic-wave (SAW) propagation, and propose an explanation for several key features of the experimental observations. We predict that properly arranged dc transport measurements would show a structure similar to that seen in SAW measurements. | Source: | arXiv, cond-mat/9712031 | Services: | Forum | Review | PDF | Favorites |
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