Lifshitz transition in triangular lattice Kondo-Heisenberg model

Zhang Lan¹, Zhong Yin^{1, †}, Luo Hong-Gang^{1, 2}

The quasiparticle energy spectra of the KHM from the direction M(0,2π3)→Γ(0,0)→K(2π3,2π3) for NN hole hopping but with NNN electron hopping, the blue dashed line denotes the Fermi energy level, where the parameters are t = –1, t₁/t = 0.3, n_c = 0.9, J_K = 2.5.