The unifying role of effective field in the composite fermion model of the fractional quantum Hall effect

Conference item

Fractional Quantum Hall Effect measurements in 50 T pulsed magnetic fields, are analysed in the Composite Fermion (CF) model. Energy gaps of all fractions in the principal series around nu=1/2 show a simple, sample independent, increase with the CF effective field following root B*. The spin polarised state at nu=5/3 follows exactly the same behaviour, but for mixed spin states like 4/3 the energy gap collapses when B*>1 T.

Authors: Leadley, DR; vanderBurgt, M; Nicholas, R; Gee, P; Singleton, J

• Publication status: Published
• Journal: SURFACE SCIENCE
• Volume: 361
• Issue: 1-3
• Pages: 22-25
• Publication date: 1996-01-01
• Event title: 11th International Conference on the Electronic Properties of 2-Dimensional Systems (EP2DS XI)
• DOI: 10.1016/0039-6028(96)00321-4
• ISSN: 0039-6028
• Keywords: quantum Hall effect; electrical transport; magnetic measurements; gallium arsenide; semiconductor heterojunctions