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Berlin 2018 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 21: Poster I

MA 21.78: Poster

Dienstag, 13. März 2018, 09:30–13:00, Poster A

Electronic transport in van der Waals layered Kagome lattice Nb3X8 Cluster Compound — •Edouard Lesne1, Jiho Yoon1, John P. Sheckelton2, Chris Pasco2, Tyrel M. McQueen2, Stuart S. P. Parkin1, and Mazhar N. Ali11Max Planck Institute of Microstructure Physics, Halle (Germany) — 2Johns Hopkins University, Baltimore (USA)

Geometrically frustrated materials based on a Kagome lattice have been long studied as promising Quantum Spin-Liquid candidates. Of particular interest are metallic spin liquids * theorized to host exotic transport properties including high temperature superconductivity [1].

Recently, the 2D van der Waals cluster compound Nb3Cl8, which has a Nb Kagome lattice, has been reported as a potential spin liquid material [2]. Due to its insulating behavior, electronic transport properties and their link to the exotic magnetism have not been investigated.

Here we report on electronic transport measurements in 10-100nm thin flakes of Nb3X8 (X= Cl, Br) in Hall bar geometries, fabricated via standard micromechanical exfoliation techniques combined with photolithography and ion-beam sputtering deposition. We further resort to electrostatic doping in a back-gate geometry, and to top-gating via ionic liquid to metallize the compound and probe a prospective metallic spin liquid state.

[1] P. W. Anderson, Science 235, 1196 (1987) [2] J. P. Sheckelton et al., Inorg. Chem. Front. 4, 481 (2017)

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