金属吸附石墨烯片的自发对称性破缺
Spontaneous Symmetry Breaking in Metal Adsorbed Graphene Sheets
摘要：
石墨烯已经受到了极大的关注，并且最近已经扩展到具有类似结构的氮化硼片（BNS）。两者都具有六方晶格，只是氮化硼中原子的交替改变了对称结构。这种差异例如可以在平均场方程中看到，对于布里渊区的角，平均场方程是狄拉克方程。对于石墨烯（等原子）的情况，我们有无质量粒子的方程，而氮化硼有一个有限的间隙，更接近狄拉克方程，质量接近这个间隙。碳结构通常并且特别是石墨烯也可以吸附电子供体，例如碱性原子或具有偶极矩的分子。一般来说，这些原子和偶极子只能在提供电子密度的意义上附着。对小片状结构的一些结果是可用的。
英文摘要：
Graphene has received a great deal of attention and this has more recently extended to boron nitride sheets (BNS) with a similar structure. Both have hexagonal lattices and it is only the alternation of atoms in boron nitride, which changes the symmetry structure. This difference can for example be seen in the mean field equations, which for the corners of the Brillouin Zone are Dirac equations. For the case of graphene (equal atoms) we have the equation for massless particles, while for Boron Nitride has a finite gap and is more near a Dirac equation with mass near this gap.. Carbon structures in general and in particular also graphene can adsorb electron donors, such as alkaline atoms or molecules with a dipole moment. Typically these atoms and the dipoles can only attach in the sense to donate electron density. Some results for small sheet like structures are available.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
