Modulation Induced Phase Transition from Fractional Quantum Hall to Stripe State at nu=5/3

Details Modulation Induced Phase Transition from Fractional Quantum Hall to Stripe State at nu=5/3 Modulation Induced Phase Transition from Fractional Quantum Hall to Stripe State at nu=5/3

2010-08-16

arxiv.org/abs/1008.2631v2

J. Phys. Soc. Jpn. 79 (2010) 103707

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 6 figures; minor revision

Scientific paper

10.1143/JPSJ.79.103707

We have investigated the effect of unidirectional periodic potential modulation on the fractional quantum Hall (FQH) state at filling factors nu=5/3 and 4/3. For large enough modulation amplitude, we find that the resistivity minimum at nu=5/3 gives way to a peak that grows with decreasing temperature. Density matrix renormalization group calculation reveals that phase transition from FQH state to unidirectional striped state having a period sim 4 l (with l the magnetic length) takes place at nu=1/3 (equivalent to nu=5/3 by the particle-hole symmetry) with the increase of the modulation amplitude, suggesting that the observed peak is the manifestation of the stripe phase.

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