Orientational pinning of the striped phase in a quantum Hall liquid

Autor:	E.E. Takhtamirov, V. A. Volkov
Rok vydání:	2000
Předmět:	Physics Magnetic anisotropy Effective mass (solid-state physics) Physics and Astronomy (miscellaneous) Condensed matter physics Landau quantization Electron Quantum Hall effect Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Anisotropy Charge density wave Magnetic field
Zdroj:	Journal of Experimental and Theoretical Physics Letters. 71:422-425
ISSN:	1090-6487 0021-3640
DOI:	10.1134/1.568368
Popis:	A new class of collective states, which are assumed to be due to the spontaneous formation of a charge density wave (“striped” phase) upon filling high Landau levels, was recently observed in a 2D electron system based on GaAs/AlGaAs(001). The following unsolved problem is considered in the work: what is the reason for stripe pinning along the crystallographic direction [110]? It is shown that the effective mass of 2D electrons is anisotropic for a single heterojunction (001) A3B5. This natural anisotropy is due to the C2v symmetry of the heterointerface and, even being weak (0.1%), can govern the stripe direction. A magnetic field parallel to the interface induces “magnetic” anisotropy of effective mass. The competition of these two types of anisotropy (natural and magnetic) provides a quantitative description of the experiment.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0811989ba011e8fd13d09853042fe268 https://doi.org/10.1134/1.568368 Zobrazit plný text záznamu Plný text ve formátu PDF