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.


Journal Details

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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