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Crossover and Coexistence of Quasiparticle Excitations in the Fractional Quantum Hall Regime at $
u leq 1/3$ | C.F. Hirjibehedin
; A. Pinczuk
; B.S. Dennis
; L.N. Pfeiffer
; K.W. West
; | Date: |
6 Jun 2003 | Journal: | Phys. Rev. Lett. 91, 186802 (2003) DOI: 10.1103/PhysRevLett.91.186802 | Subject: | Mesoscopic Systems and Quantum Hall Effect | cond-mat.mes-hall | Abstract: | New low-lying excitations are observed by inelastic light scattering at filling factors $
u=p/(phi p pm 1)$ of the fractional quantum Hall regime with $phi=4$. Coexisting with these modes throughout the range $
u leq 1/3$ are $phi=2$ excitations seen at 1/3. Both $phi=2$ and $phi=4$ excitations have distinct behaviors with temperature and filling factor. The abrupt first appearance of the new modes in the low energy excitation spectrum at $
u lesssim 1/3$ suggests a marked change in the quantum ground state on crossing the $phi=2 o phi=4$ boundary at $
u = 1/3$. | Source: | arXiv, cond-mat/0306152 | Services: | Forum | Review | PDF | Favorites |
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