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Possible Magnetic Background of the Metal-Insulator Transition in Two-Dimensional Correlated Electron System

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Abstract

Whether the apparent metal-insulator transition in two-dimensional (2D) correlated electron system is a true quantum phase transition or is a crossover phenomena—this question is in the core of ongoing debates. I present here a novel scenario of this phenomenon, based on experimental finding of the two-phase state in the correlated 2D system. The transport features in the suggested picture are the finite temperature phenomena and a consequence of the magnetic phase transition; the latter manifests in the sign change of the spin magnetization-per-electron. Physically, the magnetic transition means changing the tendency of the two-phase system to either paramagnetic Fermi liquid state (high density), or to the disordered ferromagnet (low density).

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Acknowledgments

The author acknowledges discussions with B. Spivak, and O. Sushkov. The work was supported by Russian Science Foundation (No. 16-42-01100). The measurements have been done using research equipment of the Shared Facilities Center at LPI.

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Authors and Affiliations

  1. P.N. Lebedev Physical Institute of RAS, 119991, Moscow, Russia

    V. M. Pudalov

  2. National Research University Higher School of Economics, 101000, Moscow, Russia

    V. M. Pudalov

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  1. V. M. Pudalov
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Correspondence to V. M. Pudalov.

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Pudalov, V.M. Possible Magnetic Background of the Metal-Insulator Transition in Two-Dimensional Correlated Electron System. J Supercond Nov Magn 30, 69–73 (2017). https://doi.org/10.1007/s10948-016-3759-9

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  • DOI: https://doi.org/10.1007/s10948-016-3759-9

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