arXiv Open Access 1998

Deformed Fermi Surface Theory of Magneto-Acoustic Anomaly in Modulated Quantum Hall Systems Near $/nu=1/2$

Nataliya A. Zimbovskaya Joseph L. Birman

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Abstrak

We introduce a new generic model of a deformed Composite Fermion-Fermi Surface (CF-FS) for the Fractional Quantum Hall Effect near $/nu=1/2$ in the presence of a periodic density modulation. Our model permits us to explain recent Surface Acoustic Wave observations of anisotropic anomalies [1,2] in sound velocity and attenuation- appearance of peaks and anisotropy - which originate from contributions to the conductivity tensor due to regions of the CF-FS which are flattened by the applied modulation. The calculated magnetic field and wave vector dependence of the CF conductivity,velocity shift and attenuation agree with experiments.

Topik & Kata Kunci

cond-mat.mes-hall

Penulis (2)

Nataliya A. Zimbovskaya

Joseph L. Birman

Format Sitasi

APA MLA BibTeX

Zimbovskaya, N.A., Birman, J.L. (1998). Deformed Fermi Surface Theory of Magneto-Acoustic Anomaly in Modulated Quantum Hall Systems Near $/nu=1/2$. https://arxiv.org/abs/cond-mat/9809320

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Informasi Jurnal

Tahun Terbit: 1998
Bahasa: en
Sumber Database: arXiv
Akses: Open Access ✓