Voltage-controlled Kosterlitz–Thouless transitions and various kinds of Kondo behaviors in a triple dot device

Xiong Yong-Chen^{1, 2, †}, Zhang Jun¹, Zhou Wang-Huai¹, Laref Amel^{1, 3}

(color online) (a) Charge occupation 〈n_i〉 on each dot, (b) spin correlation 〈S_iS_j〉 between dots i and j, and (c) local spin of the dots at zero temperature as functions of Δ₁. Here, Γ = 0.01, U = 0.1, ε₂ = −U/2 and Δ₂ = Δ₁/2.