Lifshitz transition in triangular lattice Kondo-Heisenberg model

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

The effective mass enhancement m^*/m versus the Heisenberg coupling J_H. Panel (a) is for NN electron hopping but with NNN hole hopping, where the parameters are t = 1, t₁/t = 0.3, n_c = 0.9, J_K = 2.5. Panel (b) is for NN hole hopping but with NNN electron hopping, where the parameters are t = –1, t₁/t = 0.3, n_c = 0.9, J_K = 2.5.