Toward an artificial Mott insulator: Correlations in confined high-density electron liquids in SrTiO3

Article

关键词: KADOWAKI-WOODS RATIO;    LOW-TEMPERATURE;    TRANSPORT;    METALS;    CONDUCTIVITY;    SCATTERING;    FILMS;    GAS;   

DOI  :  10.1103/PhysRevB.86.201102

来源: SCIE

【 摘 要 】

We investigate correlation physics in high-density, two-dimensional electron liquids that reside in narrow SrTiO3 quantum wells. The quantum wells are remotely doped via an interfacial polar discontinuity and the three-dimensional (3D) carrier density is modulated by changing the width of the quantum well. It is shown that even at 3D densities well below one electron per site, short-range Coulomb interactions become apparent in transport, and an insulating state emerges at a critical density. We also discuss the role of disorder in the insulating state.

【 授权许可】

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