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

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

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 polaris...

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Bibliografske podrobnosti
Main Authors: Leadley, DR, vanderBurgt, M, Nicholas, R, Gee, P, Singleton, J, Harris, J, Foxon, C
Format: Conference item
Izdano: 1996
Opis
Izvleček: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.

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