Single magnetic impurity in tilted Dirac surface states

Jin-Hua Sun, Lu-Ji Wang, Xing-Tai Hu, Lin Li, and Dong-Hui Xu
Phys. Rev. B 97, 035130 – Published 16 January 2018

Abstract

We utilize variational method to investigate the Kondo screening of a spin-1/2 magnetic impurity in tilted Dirac surface states with the Dirac cone tilted along the ky axis. We mainly study about the effect of the tilting term on the binding energy and the spin-spin correlation between magnetic impurity and conduction electrons. The binding energy has a critical value while the Dirac cone is slightly tilted. However, as the tilting term increases, the density of states near the Dirac node becomes significant, such that the impurity and the host material always favor a bound state. The diagonal and the off-diagonal terms of the spin-spin correlation between the magnetic impurity and conduction electrons are also studied. Due to the spin-orbit coupling and the tilting of the spectra, various components of spin-spin correlation show very strong anisotropy in coordinate space and are of power-law decay with respect to the spatial displacements.

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  • Received 7 November 2017
  • Revised 29 December 2017

DOI:https://doi.org/10.1103/PhysRevB.97.035130

©2018 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Jin-Hua Sun1,*, Lu-Ji Wang1, Xing-Tai Hu1, Lin Li2, and Dong-Hui Xu3,†

  • 1Department of Physics, Ningbo University, Ningbo, China
  • 2Department of Physics, Southern University of Science and Technology, Shenzhen, China
  • 3Department of Physics, Hubei University, Wuhan, China

  • *sunjinhua@nbu.edu.cn
  • donghuixu@hubu.edu.cn

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Issue

Vol. 97, Iss. 3 — 15 January 2018

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