2003/03/31 by F. S. Bergeret, Bodo Huckestein, B. Huckestein +1 · 1 citation
Materials Science · Physics and Astronomy · #Organic and Molecular Conductors Research #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.67.241303
published as Phys. Rev. B 67, 241303(R) (2003) · 4 pages, 3 figures; replaced with final version
openalex publication_date 2003/06/10 · arxiv created 2003/06/11 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We study the current-voltage characteristics (CVC) of two-dimensional electron gases with microwave-induced negative conductance in a magnetic field. We show that due to the Hall effect, strictly speaking, there is no distinction between N- and S-shaped CVC's. Instead, the observed CVC depends on the experimental setup with, e.g., an N-shaped CVC in a Corbino disk geometry corresponding to an S-shaped CVC in a Hall bar geometry in a strong magnetic field. We argue that instabilities of homogeneous states in regions of negative differential conductivity lead to the observation of zero resistance in Hall bars and zero conductance in Corbino disks, and we discuss the structure of current and electric-field domains.