Modulation Induced Phase Transition from Fractional Quantum Hall to Stripe State at nu 5/3
Akira Endo, Naokazu Shibata, and Yasuhiro Iye
J. Phys. Soc. Jpn 79 103707 (2010) Modify
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 ~4l (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.