Field-induced disorder in a gapped spin system with non-magnetic impurities

Abstract

We study S=1/2 dimers which are weakly coupled by three-dimensional antiferromagnetic interactions J'. It is commonly known that doping with non-magnetic impurities immediately induces a long-range Neel order. We show that application of an external magnetic field H may drive the system back to a disordered phase. We discuss the zero temperature phase diagram in the (H,J') plane and we propose suggestions for experiments.

arXiv comment4 Revtex pages, 2 figures

References in corpus (11)

• Realization of Bose-Einstein condensation of dilute magnons in TlCuCl${}_3$
• Magnon Dispersion in the Field-Induced Magnetically Ordered Phase of TlCuCl3
• Observation of Field-Induced Transverse Néel Ordering in the Spin Gap System TlCuCl${}_3$
• Local Enhancement of Antiferromagnetic Correlations by Nonmagnetic Impurities
• Low-Temperature Properties of the Randomly Depleted Heisenberg Ladder
• Impurity-Induced Antiferromagnetic Ordering in the Spin Gap System TlCuCl_3
• Non-magnetic Impurities in Spin Gap Systems
• Scaling Properties of Antiferromagnetic Transition in Coupled Spin Ladder Systems Doped with Nonmagnetic Impurities
• Spin ladders with nonmagnetic impurities
• Neutron Scattering Study of Magnetic Ordering and Excitations in the Doped Spin Gap System Tl(Cu${}_{1-x}$Mg${}_x$)Cl${}_3$
• Microscopic model for the magnetization plateaus in NH4CuCl3

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• Magnetic structure and spin dynamics of quasi-one-dimensional spin-chain antiferromagnet BaCo2V2O8
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• Drastic Change of Magnetic Phase Diagram in Doped Quantum Antiferromagnet TlCu${}_{1-x}$Mg${}_x$Cl${}_3$
• Magnetic responses of randomly depleted spin ladders
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• 51V-NMR study of antiferromagnetic state and spin dynamics in the quasi-one-dimensional BaCo2V2O8
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• The disordered-free-moment phase: a low-field disordered state in spin-gap antiferromagnets with site dilution
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• A mean-field theory for strongly disordered non-frustrated antiferromagnets
• Quantum phases of spin-1/2 extended XY model in transverse magnetic field
• Crossover from impurity-induced ordered phase to uniform antiferromagnetic phase under hydrostatic pressure in the doped spin-gap system TlCu${}_{1-x}$Mg${}_x$Cl${}_3$
• Field Induced Multiple Reentrant Quantum Phase Transitions in Randomly Dimerized Antiferromagnetic S=1/2 Heisenberg Chains
• Magnetic phases of XY model with three-spin terms: interplay of topology and entanglement
• Critical temperature and low-energy excitations in gapped spin systems with defects
• Magentic Ordering under Hydrostatic Pressure in Doped Spin Gap Systems ACu${}_{1-x}$Mg${}_x$Cl${}_3$: A$=$Tl and K