Thermal rectification in the nonequilibrium quantum-dots-system

•We study the nonequilibrium two-quantum-dots system with the DM interaction.•We can control the thermal rectification of the two-quantum-dots through modulating the DM interaction strength or changing the external magnetic field.•Large thermal rectification value can be obtained in this two-quantum-dots system.•This two-quantum-dots system has an application as a direction-controllable thermal diode.

We study thermal rectification of a two-quantum-dots system with Dzyaloshinskii–Moriya (DM) interaction and coupling to two bosonic reservoirs. Compared with other proposals (Zhang et al., 2009 [9]), our model can offer larger rectification efficiency through different modulations in small size systems (N=2).