Magnetic quantum diesel engine in Ni2
Magnetic quantum diesel engine in Ni2
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DOI：
10.1103/physrevb.88.214421
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发表时间：
2013-12-20
影响因子：
3.7
通讯作者：
Huebner, W.
中科院分区：
文献类型：
--
作者：
Dong, C. D.;Lefkidis, G.;Huebner, W.
量子狄塞尔循环的数值实现使用Ni-2二聚体的电子状态。Ni-2二聚体的量子性质和电子结构的复杂性导致了压力演化和热功转换的新特征。在分子中的等压过程中的大量内部自由度可以导致P-V图中的两个绝热过程的交叉。热与功的相互作用源自热非平衡效应，可导致高达100%的热效率。等压过程可以降低Ni-2的自旋矩。为了将分子的热容与易于获得的实验量联系起来，我们还计算了不同温度和磁场下的克尔效应和磁化率。
Quantum Diesel cycles are numerically realized using the electronic states of a Ni-2 dimer. The quantum nature and the complexity of the electronic structure of the Ni-2 dimer result in new features in the evolution of the pressure as well as in the heat-work transformation. The multitude of internal degrees of freedom in the isobaric process in molecules can result in crossing of the two adiabatic processes in the P-V diagram. The interplay of heat and work, originating from thermal nonequilibrium effects, can lead to a thermal efficiency of up to 100%. The spin moment of the Ni-2 can be decreased by the isobaric process. To link the molecular heat capacity to easily accessible experimental quantities, we also calculate the Kerr effect and the magnetic susceptibility at different temperatures and magnetic fields.