Enigmatic 4/11 State: A Prototype for Unconventional Fractional Quantum Hall Effect
Abstract
The origin of fractional quantum Hall effect (FQHE) at 4/11 and 5/13 has remained controversial. We make a compelling case that FQHE is possible here for fully spin polarized composite fermions, but with an unconventional underlying physics. Thanks to a rather unusual interaction between composite fermions, FQHE here results from the suppression of pairs with relative angular momentum {\em three} rather than one, confirming the exotic mechanism proposed by W\'ojs, Yi and Quinn [Phys. Rev. B {\bf 69}, 205322 (2004)]. We predict that the 4/11 state reported a decade ago by Pan {\em et al.} [Phys. Rev. Lett. {\bf 90}, 016801 (2003)] is a conventional partially spin polarized FQHE of composite fermions, and estimate the Zeeman energy where a phase transition into the unconventional fully spin polarized state will occur.
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@article{arxiv.1307.4168,
title = {Enigmatic 4/11 State: A Prototype for Unconventional Fractional Quantum Hall Effect},
author = {Sutirtha Mukherjee and Sudhansu S. Mandal and Ying-Hai Wu and Arkadiusz Wójs and Jainendra K. Jain},
journal= {arXiv preprint arXiv:1307.4168},
year = {2014}
}
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