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Competing correlated states around the zero field Wigner crystallization transition of electrons in two-dimensions

Falson, J. and Sodemann, I. and Skinner, B. and Tabrea, D. and Kozuka, Y. and Tsukazaki, A. and Kawasaki, M. and von Klitzing, K. and Smet, J. H. (2021) Competing correlated states around the zero field Wigner crystallization transition of electrons in two-dimensions. . (Unpublished)

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The competition between kinetic energy and Coulomb interactions in electronic systems can lead to complex many-body ground states with competing superconducting, charge density wave, and magnetic orders. Here we study the low temperature phases of a strongly interacting zinc-oxide-based high mobility two dimensional electron system that displays a tunable metal-insulator transition. Through a comprehensive analysis of the dependence of electronic transport on temperature, carrier density, in-plane and perpendicular magnetic fields, and voltage bias, we provide evidence for the existence of competing correlated metallic and insulating states with varying degrees of spin polarization. Our system features an unprecedented level of agreement with the state-of-the-art Quantum Monte Carlo phase diagram of the ideal jellium model, including a Wigner crystallization transition at a value of the interaction parameter r_s∼30 and the absence of a pure Stoner transition. In-plane field dependence of transport reveals a new low temperature state with partial spin polarization separating the spin unpolarized metal and the Wigner crystal, which we examine against possible theoretical scenarios such as an anti-ferromagnetic crystal, Coulomb induced micro-emulsions, and disorder driven puddle formation.

Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription Paper
Falson, J.0000-0003-3183-9864
Kozuka, Y.0000-0001-7674-600X
Tsukazaki, A.0000-0003-0251-063X
Kawasaki, M.0000-0001-6397-4812
von Klitzing, K.0000-0002-1720-7396
Smet, J. H.0000-0002-4719-8873
Additional Information:Attribution 4.0 International (CC BY 4.0). We appreciate discussions with Joe Checkelsky, Neil Drummond, Jim Eisenstein, Andrea Young, Steve Kivelson, Boris Spivak, and Chaitanya Murthy, along with technical support from Jian-Sheng Xia, Neil Sullivan and Gunther Euchner. M.K. acknowledge the financial support of JST CREST Grant Number JPMJCR16F1, Japan. Y.K. acknowledges JST, PRESTO Grant Number JPMJPR1763, Japan. J.F. acknowledges support from the Max Planck Institute-University of British Columbia-University of Tokyo Center for Quantum Materials, the Deutsche Forschungsgemeinschaft (DFG) (FA 1392/2-1) and the Institute for Quantum Information and Matter, an NSF Physics Frontiers Center (NSF Grant PHY-1733907).
Group:Institute for Quantum Information and Matter
Funding AgencyGrant Number
Japan Science and Technology AgencyJPMJCR16F1
Japan Science and Technology AgencyJPMJPR1763
Max Planck InstituteUNSPECIFIED
University of British ColumbiaUNSPECIFIED
University of TokyoUNSPECIFIED
Deutsche Forschungsgemeinschaft (DFG)1392/2-1
Institute for Quantum Information and Matter (IQIM)UNSPECIFIED
Record Number:CaltechAUTHORS:20210409-151541040
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:108682
Deposited By: Tony Diaz
Deposited On:11 Apr 2021 23:10
Last Modified:11 Apr 2021 23:10

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