منابع مشابه
Nonmagnetic impurities in the spin-1 Õ2 kagome antiferromagnet
Motivated by recent experiments on ZnCu3 OH 6Cl2, we study the inhomogeneous Knight shifts local susceptibilities of a spin-1 /2 kagome antiferromagnet in the presence of nonmagnetic impurities. Using high temperature series expansion, we calculate the local susceptibility and its histogram down to about T=0.4J. At low temperatures, we explore a Dirac spin liquid proposal and calculate the loca...
متن کاملEffects of nonmagnetic impurities on the spin transport property of a graphene nanoribbon device.
Using a nonequilibrium density functional calculation, we investigated the electronic transport properties and fundamental mechanism of spin polarization as a function of the location of impurities from the center to an edge of a graphene nanoribbon device (GND) with zigzag edges. A center-located impurity enables both edges to be enhanced with respect to their spin transports whereas an edge-l...
متن کاملSpin susceptibility in small Fermi energy systems: effects of nonmagnetic impurities
In small Fermi energy metals, disorder can deeply modify superconducting state properties leading to a strong suppression of the critical temperature Tc. In this paper, we show that also normal state properties can be seriously influenced by disorder when the Fermi energy EF is sufficiently small. We calculate the normal state spin susceptibility χ for a narrow band electron-phonon coupled meta...
متن کاملOrder by disorder from nonmagnetic impurities in a two-dimensional quantum spin liquid.
We consider doping of nonmagnetic impurities in the spin-1/2, 1/5-depleted square lattice. This structure, whose undoped phase diagram offers both magnetically ordered and spin-liquid ground states, is realized physically in CaV4O9. Doping into the ordered phase results in a progressive loss of order, which becomes complete at the percolation threshold. By contrast, doping into the spin liquids...
متن کاملWeakly disordered spin ladders
We analyze an anisotropic spin 1/2 two legs ladder in the presence of various type of random perturbations. The generic phase diagram for the pure system, in a way similar to spin one chains, consists of four phases: an Antiferromagnet, a Haldane gap or a Singlet phase (depending on the sign of interchain coupling) and two XY phases designated by XY1 and XY2. The effects of disorder depend cruc...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 1997
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.55.2955