Fig. 3: Magnetic-field dependence of confined interlayer excitons.
From: Confinement of long-lived interlayer excitons in WS2/WSe2 heterostructures
a Photoluminescence (PL) spectrum at 4 K as a function of magnetic field B on a nanopillar under linearly polarised excitation and circularly polarised σ+ detection. b Same measurement as a, but with σ− detection. The intensity of the components in a increases with B, and the blue-shifting components in b decrease with B, consistent with exciton thermalisation of Zeeman states at 4 K63. c Measured Zeeman splittings of confined interlayer excitons as a function of B. The red (blue) circles correspond to confined interlayer excitons with the largest (smallest) g-factor of 15.4 ± 1.5 (11.8 ± 1.4) extracted from the linear fits (dashed curves). The mean g-factor value of all measured splittings is 13.2 with a standard deviation 1.1. The error bars are smaller than the data points. d PL spectra of confined interlayer excitons collected on the same nanopillar as a and b at 0 T for σ+ excitation and co-polarised (σ+) and cross-polarised (σ−) detection, shown as black and red curves, respectively.
