Comment on ``Composite Fermion Hofstadter Problem: Partially Polarized Density Wave States in the \(\nu=2/5\) ...

In a recent paper [Phys.Rev.Lett. 82, 3665 (1999)], magnetic field driven spin transitions in fractional quantum Hall (FQH) states were reported, and in particular, at filling factors 2/3 and 2/5, weak features were observed at half polarization. This would imply that the ground state energy is non-...

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Bibliographic Details
Published in:arXiv.org 2000-07
Main Authors: Apalkov, V M, Chakraborty, T, Pietilainen, P, Niemela, K
Format: Article
Language:English
Subjects:
Charge density waves
Fermions
Ground state
Polarization
Online Access:Get full text
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Summary:In a recent paper [Phys.Rev.Lett. 82, 3665 (1999)], magnetic field driven spin transitions in fractional quantum Hall (FQH) states were reported, and in particular, at filling factors 2/3 and 2/5, weak features were observed at half polarization. This would imply that the ground state energy is non-monotonic at half polarization. It was proposed in Ref.[Phys. Rev. Lett. 84, 350 (2000)] that the system is then a charge density wave (CDW) state of composite fermions with a subband gap that could explain the observed plateaus at half polarization. Similar CDW state is also expected at filling factor 2/3. Here we show that the proposed CDW state is not the half polirized ground state at these two filling factors.
ISSN:2331-8422