Pregled bibliografske jedinice broj: 1111487
Collective Modes of Bilayer Quantum Hall Systems in High Landau Levels: From Interlayer Coherence to Stripes
Collective Modes of Bilayer Quantum Hall Systems in High Landau Levels: From Interlayer Coherence to Stripes // American Physical Society, Annual March Meeting
Seattle (WA), Sjedinjene Američke Države, 2001. G29.005, 1 (predavanje, međunarodna recenzija, sažetak, znanstveni)
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Naslov
Collective Modes of Bilayer Quantum Hall Systems in High Landau Levels: From Interlayer Coherence to Stripes
Autori
Coté, René ; Mihalek, Ivana ; Fertig, Herbert ; Brey, Luís
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Skup
American Physical Society, Annual March Meeting
Mjesto i datum
Seattle (WA), Sjedinjene Američke Države, 12.03.2001. - 16.03.2001
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
quantum Hall systems ; Hartree-Fock, stripes
Sažetak
Using time-dependent Hartree-Fock approximation we study the excitations of a bilayer quantum Hall system with a half-filled high Landau level in each layer. For small separations the state is spatially uniform and the collective mode spectrum contains an isotropically, linearly dispersing Goldstone mode associated with interlayer coherence. Above a critical separation stripe ordering sets in, and a second Goldstone mode appears which dispersed quadratically as a function of k_allel for k_⊥=0. For increasing separation, the oscillator strength of the quadratic mode drops rapidly, and the linearly dispersing mode continuously evolves into a form similar to that of quantum Hall stripes in a single layer system. Possible consequences of this spectrum for fluctuation effects will be discussed.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
