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arXiv 0906.0097hep-thcond-mat.mes-hallmath-phmath.MP
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狄拉克费米子在恒定磁场中的隧穿

Tunneling for Dirac Fermions in Constant Magnetic Field

El Bouazzaoui Choubabi, Mohamed El Bouziani, Ahmed Jellal

摘要:

研究了二维狄拉克费米子在恒定磁场中的隧穿效应。这可以通过在某些点处使用连续性方程来确定相应的反射系数和透射系数来完成。为此,我们考虑由石墨烯制成的系统作为两个不同区域的叠加,其中第二个区域的特征在于能隙t '。事实上,我们对待具体的系统实际上给出了两个例子:势垒和二极管。对于每种情况,我们根据能量守恒与t '的比率来讨论传输。此外,我们分析了共振隧穿通过引入一个标量洛伦兹势,它表明,总传输是可能的。

英文摘要:

The tunneling effect of two-dimensional Dirac fermions in a constant magnetic field is studied. This can be done by using the continuity equation at some points to determine the corresponding reflexion and transmission coefficients. For this, we consider a system made of graphene as superposition of two different regions where the second is characterized by an energy gap t'. In fact, we treat concrete systems to practically give two illustrations: barrier and diode. For each case, we discuss the transmission in terms of the ratio of the energy conservation and t'. Moreover, we analyze the resonant tunneling by introducing a scalar Lorentz potential where it is shown that a total transmission is possible.

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。

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