Extended Data Fig. 5: Chemical potential discontinuity at the first-order phase PIP1 to Sym12 transition in R2G.
From: Fluctuating magnetism and Pomeranchuk effect in multilayer graphene
a, κ at D = 0.8 V nm−1 in the vicinity of the PIP1 to Sym12 transition. b, Δμ corresponds to the area of the negative dip in κ. We linearly extrapolate κ in the adjacent phases (dashed lines) and set the bounds of integration at which the measured data deviate from the linear trend by more than 3σ, for which σ is the standard deviation of the measurement. The resulting bounds are indicated by the red crosses. Data here are acquired at 20 mK, with the shaded area corresponding to the measured Δμ. c, The same analysis for data acquired at 1.5 K. d, κ with the trend line of the PIP1 phase subtracted. The grey-shaded region is centred at −3σ and has a width of σ; error bars in Δμ are obtained by propagating the uncertainty in determining the bounds indicated by the error bar. e, The same analysis as in panel d but with the Sym12 phase subtracted.
