Diniz Ginetom S, Vernek Edson, Martins George B
Curso de Física, Universidade Federal de Jataí, Jataí 75801-615, GO, Brazil.
Instituto de Física, Universidade Federal de Uberlândia, Uberlândia 38400-902, MG, Brazil.
Nanomaterials (Basel). 2022 Apr 27;12(9):1480. doi: 10.3390/nano12091480.
Using the Numerical Renormalization Group method, we study the properties of a quantum impurity coupled to a zigzag silicene nanoribbon (ZSNR) that is subjected to the action of a magnetic field applied in a generic direction. We propose a simulation of what a scanning tunneling microscope will see when investigating the Kondo peak of a magnetic impurity coupled to the metallic edge of this topologically non-trivial nanoribbon. This system is subjected to an external magnetic field that polarizes the host much more strongly than the impurity. Thus, we are indirectly analyzing the ZSNR polarization through the STM analysis of the fate of the Kondo state subjected to the influence of the polarized conduction electron band. Our numerical simulations demonstrate that the spin-orbit-coupling-generated band polarization anisotropy is strong enough to have a qualitative effect on the Kondo peak for magnetic fields applied along different directions, suggesting that this contrast could be experimentally detected.
我们使用数值重整化群方法，研究了耦合到锯齿形硅烯纳米带（ZSNR）的量子杂质的性质，该纳米带受到沿任意方向施加的磁场作用。我们提出了一种模拟，以展示扫描隧道显微镜在研究耦合到这种拓扑非平凡纳米带金属边缘的磁性杂质的近藤峰时会看到什么。该系统受到外部磁场作用，该磁场使主体极化的程度远强于杂质。因此，我们通过对受极化传导电子能带影响的近藤态命运进行扫描隧道显微镜分析，间接分析ZSNR的极化情况。我们的数值模拟表明，自旋轨道耦合产生的能带极化各向异性足够强，对于沿不同方向施加的磁场，会对近藤峰产生定性影响，这表明这种对比度可以通过实验检测到。
