Singular field response and singular screening of vacancies in antiferromagnets

Abstract

For isolated vacancies in ordered local-moment antiferromagnets we show that the magnetic-field linear-response limit is generically singular: The magnetic moment associated with a vacancy in zero field is different from that in a finite field h in the limit h->0. The origin is a universal and singular screening cloud, which moreover leads to perfect screening as h->0 for magnets which display spin-flop bulk states in the weak-field limit.

5 pages, 4 figs, (v2) 2-page supplement added, final version as published

References in corpus (3)

• The quadrupolar phases of the S=1 bilinear-biquadratic Heisenberg model on the triangular lattice
• Quantum impurity in an antiferromagnet: non-linear sigma model theory
• Universal alternating order around impurities in antiferromagnets

Cited by in corpus (15)

• The even-odd effect in short antiferromagnetic Heisenberg chains
• Order from structural disorder in $XY$ pyrochlore antiferromagnet $\mathrm{E}{\mathrm{r}}_2\mathrm{T}{\mathrm{i}}_2{\mathrm{O}}_7$
• Antiferromagnetic Heisenberg Model on the Icosahedron: Influence of Connectivity and the Transition from the Classical to the Quantum Limit
• Susceptibility anisotropy and its disorder evolution in models for Kitaev materials
• Holes and magnetic polarons in a triangular lattice antiferromagnet
• Highly Dispersive Scattering From Defects In Non-Collinear Magnets
• Spin texture induced by non-magnetic doping and spin dynamics in 2D triangular lattice antiferromagnet h-Y(Mn,Al)O3
• Collective impurity effects in the Heisenberg triangular antiferromagnet
• Short-range order and hidden energy scale in geometrically frustrated magnets
• Roller-Coaster in a Flatland: Magnetoresistivity in Eu-intercalated Graphite
• Local spin-flip transitions induced by magnetic quantum impurities in two-dimensional magnets
• Quasispins of vacancy defects in Ising chains with nearest- and next-to-nearest-neighbour interactions
• Antiferromagnets with random vacancies and substitutional spins on the triangular lattice
• Quasispins of vacancy defects and their interactions in disordered antiferromagnets
• Robust semiclassical magnetization plateau in the kagome lattice