Fig. 3: Specific heat per site (Cv/N) as a function of temperature (T), for various models considered in this work.
From: Origin and stability of generalized Wigner crystallinity in triangular moiré systems
a Cv(T)/N for the LR model (model 2 in Table 1) and the NN model (model 2 but truncated to have only V1 non-zero) computed with classical Metropolis Monte Carlo for multiple system sizes. The classical model with t = 0, U → ∞ is particle-hole symmetric, so the results for n = 1/3 and n = 2/3 are identical. (b, c) show Cv(T)/N for the quantum models obtained from exact diagonalization for N = 18 sites (see Supplementary Note 3) for three densities n = 1/3, 2/3 and 5/3. (b) Cv(T)/N for the LR quantum model (model 3) and (c) Cv(T)/N for a NN (model 1). Additionally, in panels (b) and (c) we show the “classical” result for n = 1/3 for the same system size, obtained by setting t = 0 but not changing the other parameters (i.e. keeping U large, but finite).
