Quantum phase transition between one-channel and two-channel Kondo polarons

被引：1

作者：

Rincon, Julian ^{[1
]}

Garcia, Daniel J. ^{[2
,3
]}

Hallberg, K. ^{[2
,3
]}

Vojta, Matthias ^{[4
]}

机构：

[1] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA

[2] Comis Nacl Energia Atom, Ctr Atom Bariloche, Inst Balseiro, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[3] Consejo Nacl Invest Cient & Tecn, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[4] Tech Univ Dresden, Inst Theoret Phys, D-01062 Dresden, Germany

来源：

PHYSICAL REVIEW B | 2013年 / 88卷 / 14期

关键词：

DENSITY-MATRIX RENORMALIZATION; DIMENSIONAL ELECTRON-GAS; IMPURITY; STATE; METALS; MODEL;

D O I：

10.1103/PhysRevB.88.140407

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

For a mobile spin-1/2 impurity, coupled antiferromagnetically to a one-dimensional gas of fermions, perturbative ideas have been used to argue in favor of two-channel Kondo behavior of the impurity spin. Here we combine general considerations and extensive numerical simulations to show that the problem displays a novel quantum phase transition between two-channel and one-channel Kondo screening upon increasing the Kondo coupling. We construct a ground-state phase diagram and discuss the various nontrivial crossovers as well as possible experimental realizations.

引用

页数：4

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