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. 2023 May 31;9:71. doi: 10.1038/s41378-023-00530-2

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© The Author(s) 2023

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Fig. 4 — a The linear response of the Hall voltage to magnetic field strength gives a current-related sensitivity of 175 VA⁻¹T⁻¹. b Hall voltage response to back-gate voltage shows the ambipolarity of graphene. The measurement field is chosen to be |B| = 0.36 T to match the magnetizing field used for the in-flow experiments