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Title: Magnetic phases in the one-dimensional Kondo chain on a metallic surface
Authors: Lobos, A.M.
Cazalilla, M.A. 
Chudzinski, P.
Issue Date: 30-Jul-2012
Source: Lobos, A.M., Cazalilla, M.A., Chudzinski, P. (2012-07-30). Magnetic phases in the one-dimensional Kondo chain on a metallic surface. Physical Review B - Condensed Matter and Materials Physics 86 (3) : -. ScholarBank@NUS Repository.
Abstract: We study the low-temperature properties of a one-dimensional spin-1/2 chain of magnetic impurities coupled to a (normal) metal environment by means of anisotropic Kondo exchange. In the case of easy-plane anisotropy, we obtain the phase diagram of this system at T=0. We show that the in-plane Kondo coupling destabilizes the Tomonaga-Luttinger phase of the spin chain, and leads to two different phases: (i) At strong Kondo coupling, the spins in the chain form Kondo singlets and become screened by the metallic environment, and (ii) at weak and intermediate Kondo coupling, we find a novel dissipative phase characterized by diffusive gapless spin excitations. The two phases are separated by a quantum critical point of the Wilson-Fisher universality class with dynamical exponent z 2. © 2012 American Physical Society.
Source Title: Physical Review B - Condensed Matter and Materials Physics
ISSN: 10980121
DOI: 10.1103/PhysRevB.86.035455
Appears in Collections:Staff Publications

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