论文标题
具有光滑双孔电势的二维Dirac费米的指导模式和Terahertz过渡
Guided modes and terahertz transitions for two-dimensional Dirac fermions in a smooth double-well potential
论文作者
论文摘要
在汇合呼吸函数方面，解决了二维DIRAC方程的双孔问题。我们证明，对于通过屏障隔开的双重良好，均与井状波函数重叠相关的能级分裂，以及与井和屏障状态排斥相关的避免交叉的间隙大小，都可以通过电势参数来控制。强烈允许允许使用双重差的两个状态以及跨伪间隙的过渡之间的过渡，高度各向异性，并且可以调节逼真的石墨烯设备以落在高度可取的Terahertz频率范围内。
The double-well problem for the two-dimensional Dirac equation is solved for a family of quasi-one-dimensional potentials in terms of confluent Heun functions. We demonstrate that for a double well separated by a barrier, both the energy level splitting associated with the wavefunction overlap of well states, and the gap size of the avoided crossings associated with well and barrier state repulsion, can be controlled via the parameters of the potential. The transitions between the two states comprising a doublet, as well as transitions across the pseudo-gaps are strongly allowed, highly anisotropic, and for realistic graphene devices can be tuned to fall within the highly desirable terahertz frequency range.
