Details
| Original language | English |
|---|---|
| Pages (from-to) | 26801 |
| Number of pages | 1 |
| Journal | Physical review letters |
| Volume | 93 |
| Issue number | 2 |
| Publication status | Published - 9 Jul 2004 |
Abstract
The phonon excitations of fractional quantum Hall (FQH) states at filling factors ν =1÷3,2÷5, 4÷7, 3÷5, 4÷3, and 5÷3 were investigated. The excitations were found to be based on Landau-level transitions of composite fermions (CF). It was observed that at filling factor ν = 2÷3, a linear field dependence of the excitation energy in the high field regime showed a spin transition, which was excited by the phonons. All the transport gaps, except the one measured at ν = 2÷3, were found to be lower than the phonon excitation gaps due to disorder effects and because temperature was also coupled to spin flip excitations.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Physical review letters, Vol. 93, No. 2, 09.07.2004, p. 26801.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Phonon excitations of composite-fermion Landau levels
AU - Schulze-Wischeler, F.
AU - Hohls, F.
AU - Zeitler, U.
AU - Reuter, D.
AU - Wieck, A. D.
AU - Haug, R. J.
N1 - Funding information: We acknowledge financial support by BMBF and DFG priority program “quantum Hall systems.”
PY - 2004/7/9
Y1 - 2004/7/9
N2 - The phonon excitations of fractional quantum Hall (FQH) states at filling factors ν =1÷3,2÷5, 4÷7, 3÷5, 4÷3, and 5÷3 were investigated. The excitations were found to be based on Landau-level transitions of composite fermions (CF). It was observed that at filling factor ν = 2÷3, a linear field dependence of the excitation energy in the high field regime showed a spin transition, which was excited by the phonons. All the transport gaps, except the one measured at ν = 2÷3, were found to be lower than the phonon excitation gaps due to disorder effects and because temperature was also coupled to spin flip excitations.
AB - The phonon excitations of fractional quantum Hall (FQH) states at filling factors ν =1÷3,2÷5, 4÷7, 3÷5, 4÷3, and 5÷3 were investigated. The excitations were found to be based on Landau-level transitions of composite fermions (CF). It was observed that at filling factor ν = 2÷3, a linear field dependence of the excitation energy in the high field regime showed a spin transition, which was excited by the phonons. All the transport gaps, except the one measured at ν = 2÷3, were found to be lower than the phonon excitation gaps due to disorder effects and because temperature was also coupled to spin flip excitations.
UR - http://www.scopus.com/inward/record.url?scp=4043061326&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.93.026801
DO - 10.1103/PhysRevLett.93.026801
M3 - Article
AN - SCOPUS:4043061326
VL - 93
SP - 26801
JO - Physical review letters
JF - Physical review letters
SN - 0031-9007
IS - 2
ER -