A two-channel Kondo impurity in the spin-1/2 chain: Consequences for Knight shift experiments

Abstract

A magnetic impurity in the spin-1/2 chain is a simple realization of the two-channel Kondo problem since the field theoretical descriptions in the spin-sector are identical. The correlation functions near the impurity can be calculated. Using a modified version of the numerical transfer matrix DMRG, we are able to accurately determine local properties close to the impurity in the thermodynamic limit. The local susceptibilities (Knight-shifts) show an interesting behavior in a large range around the impurities. We are able to make quantitative experimental predictions which would allow to observe two-channel Kondo physics for the first time directly by doping of spin-1/2 chain compounds.

2 pages in revtex format including 2 embedded figures (using epsf)

References in corpus (1)

• Thermodynamics of the anisotropic Heisenberg chain calculated by the density matrix renormalization group method

Cited by in corpus (6)

• Scanning Tunneling Microscopy of a Luttinger Liquid
• Spin- and charge-density oscillations in spin chains and quantum wires
• Phase diagram of an impurity in the spin-1/2 chain: two channel Kondo effect versus Curie law
• Ghost spins and novel quantum critical behavior in a spin chain with local bond-deformation
• Effects of impurities in Spin Bose-Metal phase on a two-leg triangular strip
• Reply to the "Comment on 'Phase diagram of an impurity in the spin-1/2 chain: two channel Kondo effect versus Curie law'"