1998/07/04 by Sebastian Eggert, Stefan Rommer · 35 citations
Physics and Astronomy · #Anderson impurity model #Antiferromagnetism #Condensed matter physics #Impurity #Kondo effect #Kondo model #Magnetic impurity #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum many-body systems #Quantum mechanics #Spin (aerodynamics) #Thermodynamics #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.81.1690
published in Physical Review Letters 81(8), 1690-1693 (American Physical Society) · 5 pages in revtex format including 3 embedded figures (using epsf). The latest version in PDF format is available from http://fy.chalmers.se/~eggert/papers/crossover.pdf . Accepted by PRL
arxiv created 1998/07/04 · openalex publication_date 1998/08/24 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We consider a magnetic impurity in the antiferromagnetic spin- 1/2 chain which is equivalent to the two-channel Kondo problem in terms of the field theoretical description. Using a modification of the transfer-matrix density matrix renormalization group we are able to determine the crossover function for the impurity susceptibility over a large temperature range, which exhibits universal data collapse. We also calculate the local susceptibilities near the impurity, which show an interesting competition of boundary effects. This results in quantitative predictions for experiments on doped spin- 1/2 chains, which could observe two-channel Kondo physics directly.