论文标题
基于铁磁绝缘子的超导隧道连接的热量矫正非常大
Very large thermal rectification in ferromagnetic insulator-based superconducting tunnel junctions
论文作者
论文摘要
我们研究了基于铁磁绝缘子的超导隧道连接中的电子热整流。已知与超导体结合的铁磁绝缘子在状态的超导密度中诱导相当大的自旋分裂，如果作为隧道屏障操作，也会导致有效的自旋滤波。旋转分裂和自旋滤波的结合显示，由于系统中的电子孔对称性破坏了系统中的电子热对称性，因此对电子热二极管效应产生了实质性的自我放大，该效应添加到了连接点的热不对称中。对于合适的温度范围内的实际参数，大型自旋分裂和较大的自旋极化可能导致超过5 .10^4的热整流效率，从而超过250倍的二二二极管效应，而传统的超导隧道隧道连接可达到的热二极管效应。这些结果可能与改善创新的相位量热纳米电视中热流的掌握以及增强纳米级量子电路的热管理有关。
We investigate electronic thermal rectification in ferromagnetic insulator-based superconducting tunnel junctions. Ferromagnetic insulators coupled to superconductors are known to induce sizable spin splitting in the superconducting density of states, and also lead to efficient spin filtering if operated as tunnel barriers. The combination of spin splitting and spin filtering is shown to yield a substantial self-amplification of the electronic heat diode effect due to breaking of the electron-hole symmetry in the system which is added to the thermal asymmetry of the junction. Large spin splitting and large spin polarization can potentially lead to thermal rectification efficiency exceeding 5 .10^4 for realistic parameters in a suitable temperature range, thereby outperforming up to a factor of 250 the heat diode effect achievable with conventional superconducting tunnel junctions. These results could be relevant for improved mastering of the heat currents in innovative phase-coherent caloritronic nanodevices, and for enhanced thermal management of quantum circuits at the nanoscale.
