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Insulator-metal transition and quasi-flat-band of Shastry-Sutherland lattice.

08:00 EDT 16th May 2019 | BioPortfolio

Summary of "Insulator-metal transition and quasi-flat-band of Shastry-Sutherland lattice."

Insulator-metal transition is investigated self-consistently on the frustrated Shastry-Sutherland lattice in the framework of Slave-Boson mean-field theory. Due to the quasi-flat band structure characteristic, the system displays a spin-density-wave (SDW) insulating phase at the weak doping levels, which is robust against frustration, and it will be transited into a SDW metallic phase at high doping levels. As further increasing the doping, the temperature or the frustration on the diagonal linking bonds, the magnetic order $m$ will be monotonically suppressed, resulting in the appearance of a paramagnetic metallic phase. Although Fermi surface of SDW metallic phase may be immersed by temperature, the number of mobile charge is robust against temperature at small doping levels.

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This article was published in the following journal.

Name: Journal of physics. Condensed matter : an Institute of Physics journal
ISSN: 1361-648X
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