Year: 2004
Type: article
Abstract: On the basis of energy calculations we investigate the competition between quantum-liquid and electron-solid phases in the Landau levels $n=1,2,$ and 3 as a function of their partial filling factor $\overline{\ensuremath{\nu}}.$ Whereas the quantum-liquid phases are stable only in the vicinity of quantized values of $\overline{\ensuremath{\nu}}=1/(2s+1),$ an electron solid in the form of a triangular lattice of clusters with a few number of electrons (bubble phase) is energetically favorable between these fillings. This alternation of electron-solid phases, which are insulating because they are pinned by the residual impurities in the sample, and quantum liquids displaying the fractional quantum Hall effect explains a recently observed reentrance of the integral quantum Hall effect in the Landau levels $n=1$ and 2. Around half-filling of the last Landau level, a unidirectional charge density wave (stripe phase) has a lower energy than the bubble phase.
Source: Physical Review B
Authors: M. O. Goerbig, P. Lederer, C. Morais Smith
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2044074522