Competition between antiferromagnetic and superconducting states, electron-hole doping asymmetry, and fermi-surface topology in high temperature superconductors.
TLDR
This work finds that key features of the T=0 phase diagram, such as critical doping for SC-AFM coexistence and the maximum value of the SC order parameter, are determined by a single parameter eta which characterizes the topology of the "Fermi surface" at half filling defined by the bare tight-binding parameters.Abstract:
We investigate the asymmetry between electron and hole doping in a 2D Mott insulator and the resulting competition between antiferromagnetism (AFM) and d-wave superconductivity (SC), using variational Monte Carlo calculations for projected wave functions. We find that key features of the T=0 phase diagram, such as critical doping for SC-AFM coexistence and the maximum value of the SC order parameter, are determined by a single parameter eta which characterizes the topology of the "Fermi surface" at half filling defined by the bare tight-binding parameters. Our results give insight into why AFM wins for electron doping, while SC is dominant on the hole-doped side. We also suggest using band structure engineering to control the eta parameter for enhancing SC.read more
Citations
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Progress and perspectives on electron-doped cuprates
TL;DR: In this paper, the authors summarized the current experimental status of electron-doped cuprates, with a goal to provide a snapshot of the current understanding of these materials, and synthesize this information into a consistent view on a number of topics important to both this material class as well as the overall cuprate phenomenology including the phase diagram, the superconducting order parameter symmetry, phase separation, pseudogap effects, the role of competing orders, the spin-density wave mean-field description of the normal state, and electron-phonon coupling.
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High-Tc Superconductivity and Antiferromagnetism in Multilayered Copper Oxides –A New Paradigm of Superconducting Mechanism–
TL;DR: In this paper, the intrinsic phase diagram of antiferromagnetic magnetism and high-temperature superconductivity for a disorder-free CuO 2 plane with hole carriers was uncovered.
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Scaling of the transition temperature of hole-doped cuprate superconductors with the charge-transfer energy
TL;DR: In this article, the authors used first-principles calculations to extract two essential microscopic parameters, the charge transfer energy and the intercell oxygen-oxygen hopping, which correlate with the maximum superconducting transition temperature Tc,max across the cuprates.
Journal ArticleDOI
High-Tc Superconductivity and Antiferromagnetism in Multilayered Copper Oxides - A New Paradigm of Superconducting Mechanism -
TL;DR: In this paper, the intrinsic phase diagram of antiferromagnetism (AFM) and high-temperature superconductivity (HTSC) for a disorder-free CuO2 plane with hole carriers was uncovered.
Journal ArticleDOI
Scaling of the transition temperature of hole-doped cuprate superconductors with the charge-transfer energy
TL;DR: In this article, the authors used first-principles calculations to extract two essential microscopic parameters, the charge transfer energy and the intercell oxygen-oxygen hopping, which correlate with the maximum superconducting transition temperature across the cuprates.
References
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On Anyon Superconductivity
TL;DR: It is argued that for large n perturbation theory is reliable and exhibits superfluidity (or superconductivity after coupling to electromagnetism) and the order parameter is described in terms of “spontaneous breaking of commutativity of translations” as opposed to the usual pairing order parameters.