Year: 1998
Type: article
Abstract: The width of the Hall plateau and the activation energy were measured in the bilayer quantum Hall state at filling factors $\ensuremath{\nu}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}2$, 1, and 2/3 by changing the total electron density and the density ratio in the two quantum wells. Their behaviors are remarkably different. The $\ensuremath{\nu}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1$ state is found to be stable over all measured range of the density difference. The $\ensuremath{\nu}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}2/3$ state is stable only around the balanced point. The $\ensuremath{\nu}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}2$ state shows a phase transition between these two types of states as the electron density is changed.
Source: Physical Review Letters
Authors: A. Sawada, Z. F. Ezawa, H. Ohno, Y. Horikoshi, Y. Ohno, S. Kishimoto, F. Matsukura, M. Yasumoto, A. Urayama
Institutions: Tohoku University, Waseda University
Language: Latvian
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1980739656