论文标题
多层石墨烯是可内核的奥托引擎
Multilayer Graphene as an Endoreversible Otto Engine
论文作者
论文摘要
石墨烯也许是最突出的“狄拉克材料”，这是一类系统，其电子结构会产生作为相对论费米子的电荷载体。在多层石墨烯中，几个晶体板被堆叠，以使每一层的蜂窝晶格沿着一个晶格边缘位移。当受到外部磁场的约束时，多层能量光谱与磁场的缩放量，因此系统的热力学行为在很大程度上取决于层的数量。考虑到这一点，我们以多层石墨烯为其工作介质研究了有限的内无内膜奥托循环的性能。我们表明，发动机效率与图层数量之间存在简单的关系，并且最大功率的效率可以超过经典的可耐用的Otto循环。
Graphene is perhaps the most prominent "Dirac material," a class of systems whose electronic structure gives rise to charge carriers that behave as relativistic fermions. In multilayer graphene several crystal sheets are stacked such that the honeycomb lattice of each layer is displaced along one of the lattice edges. When subject to an external magnetic field, the scaling of the multilayer energy spectrum with the magnetic field, and thus the system's thermodynamic behavior, depends strongly on the number of layers. With this in mind, we examine the performance of a finite-time endoreversible Otto cycle with multilayer graphene as its working medium. We show that there exists a simple relationship between the engine efficiency and the number of layers, and that the efficiency at maximum power can exceed that of a classical endoreversible Otto cycle.
