SKM 2021 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 4: Poster

DS 4.19: Poster

Dienstag, 28. September 2021, 10:00–13:00, P

Magnetotransport and thermoelectric properties of vanadium disulfide (VS₂) flakes — •Yejin Lee^1,2, Gyu-Hyeon Park^1,2, Grigory Shipunov¹, Geishendorf Kevin¹, Bernd Buechner¹, Kornelius Nielsch^1,2, Saicharan Aswatham¹, and Andy Thomas^1,2 — ¹IFW Dresden — ²Technische Universität Dresden

Two-dimensional transition metal dichalcogenides (TMDCs) have drawn extensive interest due to their intriguing electrical transport properties. Vanadium disulfide (VS₂) is a member of metallic TMDCs and interestingly, theoretical calculations have predicted magnetic characteristics. Here, we investigate magnetotransport and thermoelectric properties of exfoliated VS₂ flakes from a single crystal grown by chemical vapor transport technique. The magnetotransport characterizations were performed in an external magnetic field of up to 9 T. We found that the VS₂ flake exhibits a specific temperature dependence at around 21 K, which is consistent with the presence of a weak magnetic anomaly seen in the single crystal. In addition, a negative magnetoresistance is observed with a steep decrease at 2.5 T and below 20 K, where the slope of the magnetic field dependent Hall resistance changes. Furthermore, Seebeck coefficients are evaluated and it indicates a p-n type transition in the low temperature regime if a single band model is assumed. This findings provide further insight into the magnetotransport and thermoelectric properties of van Der Waals TMDCs.