论文标题
小带隙碳纳米管量子点中的近野效应
Kondo effects in small bandgap carbon nanotube quantum dots
论文作者
论文摘要
我们研究了在强相关性方面存在自旋轨道偶联的小带量碳纳米管量子点的磁性。有限-U的平均场奴隶玻色子方法用于研究多体效应。在磁场中恢复了不同的变性，并且不同类型的SU（3）效应发生了不同的对称性。在零场中可能会回收全旋转轨道变性，并相应地（4）临界效应集。我们指出的是，在倾斜磁场中发生电子孔撰稿人效应的可能性，我们预测这将发生在可用的磁场中，以实现接近垂直的磁场的方向。当场接近横向方向时，观察到来自SU（2）或SU（3）对称性的SU（4）的交叉。
We study magnetoconductance of the small bandgap carbon nanotube quantum dots in the presence of spin-orbit coupling in the strong correlations regime. The finite-U mean field slave boson approach is used to study many-body effects. Different degeneracies are restored in magnetic field and Kondo effects of different symmetries arise including SU(3) effects of different types. Full spin-orbital degeneracy might be recovered for zero field and correspondingly SU(4) Kondo effect sets in. We point out on the possibility of the occurrence of electron-hole Kondo effects in slanting magnetic fields, which we predict will occur in the available magnetic fields for orientation of fields close to perpendicular. When the field approaches transverse orientation a crossover from SU(2) or SU(3) symmetry into SU(4) is observed.
