Evidence of a magnetic Bose glass in IPA-Cu(Cl0.95Br0.05)3 from neutron diffraction

Abstract

We report the single crystal study of the bulk magnetization and neutron scattering measurements on a quantum S=1/2 spin ladders system IPA-Cu(Cl0.95Br0.05)3with quenched disorder. In zero field, the disordered spin liquid phase is preserved as in pure IPA-CuCl3. Due to the bond randomness, a different Bose glass phase was directly observed in Hc<H<H', which separates the spin liquid phase from the unconventional Bose-Einstein condensation phase. The observed finite value of boson compressibility dM/dH and lack of field-induced three-dimensional long range order are consistent with the theoretical prediction.

4 pages, 3 figures; to appear in PRB-RC

References in corpus (4)

• Bose-Einstein Condensation in Magnetic Insulators
• The insulating phases and superfluid-insulator transition of disordered boson chains
• Muon spin relaxation and rotation study on the solid solution of the two spin-gap systems (CH3)2CHNH3-CuCl3 and (CH3)2CHNH3-CuBr3
• Effect of pressure on the quantum spin ladder material IPA-CuCl3

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