Thermal Transport Of Josephson Junction Based On Two-dimensional Electron Gas

In recent years,heat conduction based on two-dimensional Josephson junction has attracted much attention of many researchers due to its broad application prospects.Due to the fact that the heat flow through the junction is a periodic function of the phase difference between the superconducting electrodes on both sides of the junction,therefore the size of heat flow and the current-adjusting sensitivity of the junction can be controlled by skillfully adjusting the parameters related to the phase difference of the superconducting electrodes.Meanwhile,two-dimensional electron gas(2DEG)has become one of the hotspots in material research due to its unique physical properties.Therefore,in this paper we construct a Josephson junction based on 2DEG(S-2DEG-S)by using 2DEG as the intermediate material and superconductors(S)attached to the left and right sides respectively,then we make use of the single particle scattering matrix theory to study the heat transfer of the junction.In addition,a temperature regulator based on the junction is proposed and the factors affecting the temperature regulation of the device are analyzed.The main results of this paper are summarized as follows:1.The material interaction parameter h0 and the self-defined parameter |?R/?R-?L/?L| put effect on the heat conduction of the S-2DEG-S Josephson junction,where h0 characterizing the interaction strength between quasiparticles and impurities in the material is related to doping concentration,?,? the spin-orbit coupling parameters of Rashba and Dresselhaus and the lower angle scales L,R represent the left and right superconducting electrodes respectively.When the value of h0 is(?)(where,? the chemical potential and ? the superconducting gap)or its vicinity and the value of parameter|?R/?R-?L/?L| is larger,the junction can adjust the larger heat flow sensitively.2.The temperature regulator based on the Josephson junction mentioned above has similar properties to that of the junction,i.e.when the values of h0 and |?R/?R-?L/?L| are both appropriate,it has more sensitive temperature regulation behaviors and can make one side of the superconductor produce a higher temperature.3.Based on the above results,a high-efficiency temperature regulator with sensitive temperature regulation behavior can be constructed by using moderately-doped 2DEG materials and superconductors.