Spin wave transport through electron solids and fractional quantum Hall liquids in graphene

Zhou H, Polshyn H, Tanaguchi T, Watanabe K, Young A. 2019. Spin wave transport through electron solids and fractional quantum Hall liquids in graphene. APS March Meeting 2019. APS: American Physical Society vol. 64, P01.00004.

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Conference Paper | Published | English
Author
Zhou, Haoxin; Polshyn, HryhoriyISTA ; Tanaguchi, Takashi; Watanabe, Kenji; Young, Andrea
Abstract
In monolayer graphene, the interplay of electronic correlations with the internal spin- and valley- degrees of freedom leads to a complex phase diagram of isospin symmetry breaking at high magnetic fields. Recently, Wei et al. (Science (2018)) demonstrated that spin waves can be electrically generated and detected in graphene heterojunctions, allowing direct experiment access to the spin degree of freedom. Here, we apply this technique to high quality graphite-gated graphene devices showing robust fractional quantum Hall phases and isospin phase transitions. We use an edgeless Corbino geometry to eliminate the contributions of edge states to the spin-wave mediated nonlocal voltage, allowing unambiguous identification of spin wave transport signatures. Our data reveal two phases within the ν = 1 plateau. For exactly ν=1, charge is localized but spin waves propagate freely while small carrier doping completely quenches the low-energy spin-wave transport, even as those charges remain localized. We identify this new phase as a spin textured electron solid. We also find that spin-wave transport is modulated by phase transitions in the valley order that preserve spin polarization, suggesting that this technique is sensitive to both spin and valley order.
Publishing Year
Date Published
2019-03-01
Proceedings Title
APS March Meeting 2019
Volume
64
Issue
2
Article Number
P01.00004
Conference
APS: American Physical Society
Conference Location
Boston, MA, United States
Conference Date
2019-03-04 – 2019-03-08
ISSN
IST-REx-ID

Cite this

Zhou H, Polshyn H, Tanaguchi T, Watanabe K, Young A. Spin wave transport through electron solids and fractional quantum Hall liquids in graphene. In: APS March Meeting 2019. Vol 64. American Physical Society; 2019.
Zhou, H., Polshyn, H., Tanaguchi, T., Watanabe, K., & Young, A. (2019). Spin wave transport through electron solids and fractional quantum Hall liquids in graphene. In APS March Meeting 2019 (Vol. 64). Boston, MA, United States: American Physical Society.
Zhou, Haoxin, Hryhoriy Polshyn, Takashi Tanaguchi, Kenji Watanabe, and Andrea Young. “Spin Wave Transport through Electron Solids and Fractional Quantum Hall Liquids in Graphene.” In APS March Meeting 2019, Vol. 64. American Physical Society, 2019.
H. Zhou, H. Polshyn, T. Tanaguchi, K. Watanabe, and A. Young, “Spin wave transport through electron solids and fractional quantum Hall liquids in graphene,” in APS March Meeting 2019, Boston, MA, United States, 2019, vol. 64, no. 2.
Zhou H, Polshyn H, Tanaguchi T, Watanabe K, Young A. 2019. Spin wave transport through electron solids and fractional quantum Hall liquids in graphene. APS March Meeting 2019. APS: American Physical Society vol. 64, P01.00004.
Zhou, Haoxin, et al. “Spin Wave Transport through Electron Solids and Fractional Quantum Hall Liquids in Graphene.” APS March Meeting 2019, vol. 64, no. 2, P01.00004, American Physical Society, 2019.
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