Fig. 4: Electrical-field-tuned phases at ν = 2.
From: Topological Kondo insulator in MoTe2/WSe2 moiré bilayers
a–d, Transport characteristics around total filling factor \(\nu =2\) as a function of \(\nu\) and \(E\): local resistance \({R}_{\mathrm{xx}}\) under \({B}_{\perp }=0\) T (a) and 14 T (b), bulk resistance (c) and non-local resistance (d) under \({B}_{\perp }=0\) T. Resistances are shown in a log scale in a–c and a linear scale in d. Two electric fields (\({E}_{1}\) and \({E}_{2}\)) divide the \(\nu =2\) phase into three regimes from low to high fields: the regime with \({\nu }_{{\rm{f}}}\) = 2, mixed valence with \({\nu }_{{\rm{f}}} > 1\) and \({\nu }_{{\rm{c}}} < 1\), and Kondo lattice with \({\nu }_{{\rm{f}}}\approx {\nu }_{{\rm{c}}}\approx 1\) (between the two blue dashed lines; a). The results are shown from device 2 at 1.6 K.
