Electron-hole doping asymmetry of Fermi surface reconstructed in a simple Mott insulator

Abstract

It is widely recognised that the effect of doping into a Mott insulator is complicated and unpredictable, as can be seen by examining the Hall coefficient in high $T_{\mathrm{c}}$ cuprates. The doping effect, including the electron-hole doping asymmetry, may be more straightforward in doped organic Mott insulators owing to their simple electronic structures. Here we investigate the doping asymmetry of an organic Mott insulator by carrying out electric-double-layer transistor measurements and using cluster perturbation theory. The calculations predict that strongly anisotropic suppression of the spectral weight results in the Fermi arc state under hole doping, while a relatively uniform spectral weight results in the emergence of a non-interacting-like Fermi surface in the electron-doped state. In accordance with the calculations, the experimentally observed Hall coefficients and resistivity anisotropy correspond to the pocket formed by the Fermi arcs under hole doping and to the non-interacting Fermi surface under electron doping.

arXiv comment40 pages with 17 figures, accepted for publication in Nature Communications

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• Spin current generation in organic antiferromagnets
• Anomalous Hall effect in $\kappa$-type organic antiferromagnets
• Two-dimensional ground-state mapping of a Mott-Hubbard system in a flexible field-effect device
• Critical Behavior in Doping-Driven Metal$-$Insulator Transition on Single-Crystalline Organic Mott-FET
• Variational cluster approach to thermodynamic properties of interacting fermions at finite temperatures: A case study of the two-dimensional single-band Hubbard model at half filling
• Mechanism of superconductivity and electron-hole doping asymmetry in $\kappa$-type molecular conductors
• Doping and temperature evolution of pseudogap and spin-spin correlations in the two-dimensional Hubbard model
• Altermagnetism from coincident Van Hove singularities: application to $\kappa$-Cl
• Antiferromagnetic State in $\kappa$-type Molecular Conductors: Spin Splitting and Mott Gap
• Non-Fermi-liquid behavior and doping asymmetry in an organic Mott insulator interface
• Simultaneous Control of Bandfilling and Bandwidth in Electric Double-Layer Transistor Based on Organic Mott Insulator $\kappa$-(BEDT-TTF)${}_2$Cu[N(CN)${}_2$]Cl
• Correlated Zak insulator in organic antiferromagnets
• Not all doped Mott insulators have a pseudogap: key role of van Hove singularities
• Possibility of BCS-BEC crossover in $\kappa$-type organic superconductors