Magnetic impurity in topological nodal loop semimetals

Area of Science:

• Condensed Matter Physics
• Topological Materials Science

Background:

• Topological nodal loop semimetals feature unique band structures with nodal loops.
• The Kondo effect describes the interaction between magnetic impurities and conduction electrons.

Purpose of the Study:

• Investigate the Kondo effect of a spin-1/2 magnetic impurity in a topological nodal loop semimetal.
• Analyze the formation of bound states and spatial spin-spin correlations.

Main Methods:

• Theoretical investigation of the Kondo effect.
• Analysis of Fermi surface properties as a function of chemical potential.
• Calculation of spatial spin-spin correlations.

Main Results:

• Bound state formation depends on the chemical potential relative to the nodal loop.
• Away from the nodal loop, bound states always form due to finite density of states.
• Anisotropic power-law decay of spin-spin correlations with oscillations.

Conclusions:

• The chemical potential critically influences bound state formation in these systems.
• The evolution of the Fermi surface affects the nature of spin-spin correlations.
• This study provides insights into impurity effects in topological semimetals.