Wigner crystal and other insulating phases of two-dimensional electrons in high magnetic fields

• Autorzy: Podor B.
• Konferencja: The Second International Conference on Solid State Crystals '2000 (ICSS'2000) ; (9.10-13.10.2000 ; Zakopane , Poland)
• Języki publikacji: EN

Abstrakty

EN

A concise review of the history and of the hasic physics of the Wigner crystal (electron solid) in two-dimensional electron systems in semiconductor heterostructures is given. The results of our experimental study on the formation and of the properties of the magnetic field-induced insulating phase, supposed to he a Wigner crystal, in a two-dimensional electron gas in In₀.₅₃Ga₀.₄₇As/InP heterostructures are surveyed. These structures are characterised by a much greater disorder potential than AlGaAs/GaAs heterostructures due to the inherent alloy disorder in the InGaAs layer supporting the two-dimensional electron gas. In high magnetic fields, helow a Landau level filling factor of 0.4-0.5 divergent resistivity, non-linear current-voltage characteristics with a threshold, and a transition from non-activated to activated transport were observed. A model is proposed for the Wigner crystal-like ordering of the two-dimensional electron gas in this system with large disorder

Słowa kluczowe

EN

Wigner crystal; In0.53Ga0.47As/InP; two-dimensional electron gas

• Wydawca: Stowarzyszenie Elektryków Polskich ; Polska Akademia Nauk ; Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
• Czasopismo: Opto-Electronics Review
• Rocznik: 2001
• Tom: Vol. 9, No. 2
• Strony: 195--202
• Opis fizyczny: Bibliogr. 55 poz.

Twórcy

autor

Podor B.

• Research Institute for Technical Physics and Materials Science, Hungarin Academy of Sciences, Konkoly-Thege u. 29-33, P.O. Box 49, H-1525 Budapest, Hungary,