Fig. 3

Magnetoconductance and carrier density of 2D hybrid devices. a The mean of normalized magneto-conductivity with respect to zero-field value (σ _xx (B)/σ _xx (B = 0)) at 390 K (spin triplet state of QDTP) for 10 different samples from each hybrid has been plotted to show the consistency of the result. The colored region (red for MoS₂ and green for graphene) depicts the s.d. ( ± σ) of the data for each magnetic field. Graphene–QDTP hybrid (black) shows large negative differential magneto-conductivity \((\Delta {\sigma_{xx}}{\vert}_{{\rm 390} \,{\rm K}}=-2.5 \,{e}^2/{h})\) at 390 K, compared with room temperature. In contrast, MoS₂–QDTP hybrid (red) shows large positive differential magneto-conductivity \((\Delta {\sigma_{xx}}{\vert}_{{\rm 390} \,{\rm K}}=+0.23 \,{e}^2/{h})\) at 390 K, compared with room temperature. b Mean of normalized carrier density (n _exp/n _300K) as a function of temperature (300–390 K). S.D. for each data point has been shown in colored filling ( ± σ). Graphene–QDTP hybrid (black) shows a gradual decrease of carrier density in the given temperature window from its room temperature value (n _390 K/n _300 K ~ 0.5), calculated from the theoretical fit of raw σ _xx (B) data, shown in Supplementary Fig. 5, and Supplementary Table 3. In contrast, MoS₂–QDTP hybrid (red) shows a sharp increase of carrier density at 370 K (spin transition temperature of QDTP), and reaches 10 times larger value at 400 K from its room temperature value. Inset: Magnetoconductance (MC) of the two hybrid devices. Graphene—QDTP hybrid (black) shows a negative MC of 50%, while MoS₂ – QDTP hybrid (red) shows large positive MC of 100% with a sharp jump around 370 K