Magnetic Chern bands and triplon Hall effect in an extended Shastry-Sutherland model
Malki M, Schmidt KP (2017)
Publication Language: English
Publication Status: Published
Publication Type: Journal article
Publication year: 2017
Journal
Publisher: AMER PHYSICAL SOC
Book Volume: 95
Article Number: ARTN 195137
Journal Issue: 19
DOI: 10.1103/PhysRevB.95.195137
Abstract
We study topological properties of one-triplon bands in an extended Shastry-Sutherland model relevant for the frustrated quantum magnet SrCu2(BO3)(2). To this end perturbative continuous unitary transformations are applied about the isolated dimer limit allowing us to calculate the one-triplon dispersion up to high order in various couplings including intra-and interdimer Dzyaloshinskii-Moriya interactions and a general uniform magnetic field. We determine the Berry curvature and the Chern number of the different one-triplon bands. We demonstrate the occurrence of Chern numbers +/- 1 and +/- 2 for the case that two components of the magnetic field are finite. Finally, we also calculate the triplon Hall effect arising at finite temperatures.
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APA:
Malki, M., & Schmidt, K.P. (2017). Magnetic Chern bands and triplon Hall effect in an extended Shastry-Sutherland model. Physical Review B, 95(19). https://doi.org/10.1103/PhysRevB.95.195137
MLA:
Malki, Maik, and Kai Phillip Schmidt. "Magnetic Chern bands and triplon Hall effect in an extended Shastry-Sutherland model." Physical Review B 95.19 (2017).
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