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

TL;DR

This paper demonstrates that unidirectional periodic potential modulation induces a phase transition from a fractional quantum Hall state to a stripe state at filling factor nu=5/3, supported by experimental and theoretical evidence.

Contribution

It reveals a modulation-induced phase transition from FQH to stripe state at nu=5/3, combining experimental observations with density matrix renormalization group calculations.

Findings

Resistivity minimum at nu=5/3 turns into a peak with increased modulation.

Phase transition from FQH to stripe state occurs at nu=1/3 (equivalent to 5/3).

Stripe state has a period approximately 4 times the magnetic length.

Abstract

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.