Observation of pinning mode in Wigner solid of 1/3 fractional quantum   Hall excitations

Han Zhu; Yong P. Chen; P. Jiang; L. W. Engel; D. C. Tsui; L. N.; Pfeiffer; K. W. West

arXiv:1006.2335·cond-mat.mes-hall·May 19, 2015

Observation of pinning mode in Wigner solid of 1/3 fractional quantum Hall excitations

Han Zhu, Yong P. Chen, P. Jiang, L. W. Engel, D. C. Tsui, L. N., Pfeiffer, K. W. West

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TL;DR

This paper reports the detection of a resonance in microwave spectra indicating a collective pinning mode of a Wigner solid formed by fractional quantum Hall excitations at filling factor 1/3.

Contribution

It provides the first observation of a pinning mode in a Wigner solid of fractional quantum Hall excitations, expanding understanding of electron solid phases.

Findings

01

Resonance observed near filling factor 1/3 in microwave spectra.

02

Resonance interpreted as collective pinning mode of a disorder-pinned Wigner solid.

03

Wigner solid composed of e/3-charged carriers.

Abstract

We report the observation of a resonance in the microwave spectra of the real diagonal conductivities of a two-dimensional electron system within a range of ~ +- .0.015 $f r o m f i l l in g f a c t or$ \nu=1/3 $. T h er eso nan ce i sr e ma r k ab l y s imi l a r t or eso nan ces p r e v i o u s l y o b ser v e d n e a r in t e g er$ \nu $, an d i s in t er p r e t e d a s t h eco l l ec t i v e p innin g m o d eo f a d i sor d er - p inn e d W i g n er so l i d p ha seo f$ e/3$-charged carriers .

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