Evidence of a magnetic Bose glass in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mrow><mml:mo>(</mml:mo><mml:mrow><mml:msub><mml:mrow><mml:mtext>CH</mml:mtext></mml:mrow><mml:mn>3</mml:mn></mml:msub></mml:mrow><mml:mo>)</mml:mo></mml:mrow></mml:mrow><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mrow><mml:mtext>CHNH</mml:mtext></mml:mrow><mml:mn>3</mml:mn></mml:msub><mml:mtext>Cu</mml:mtext><mml:msub><mml:mrow><mml:mrow><mml:mo>(</mml:mo><mml:mrow><mml:msub><mml:mrow><mml:mtext>Cl</mml:mtext></mml:mrow><mml:mrow><mml:mrow><mml:mo>{</mml:mo><mml:mrow><mml:mn>0.95</mml:mn></mml:mrow><mml:mo>}</mml:mo></mml:mrow></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mtext>Br</mml:mtext></mml:mrow><mml:mrow><mml:mrow><mml:mo>{</mml:mo><mml:mrow><mml:mn>0.05</mml:mn></mml:mrow><mml:mo>}</mml:mo></mml:mrow></mml:mrow></mml:msub></mml:mrow><mml:mo>)</mml:mo></mml:mrow></mml:mrow><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>from neutron diffraction
Tao HongNeutron Scattering Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USAA. ZheludevLaboratorium für Festkörperphysik, ETH Zürich, Zürich CH-8093, SwitzerlandHirotaka ManakaGraduate School of Science and Engineering, Kagoshima University, Korimoto, Kagoshima 890-0065, JapanL. P. RégnaultINAC-SPSMS-MDN, CEA-Grenoble, 17 rue des Martyrs, 38054 Grenoble Cedex 9, France
2010lv
ABI
Abstract
We report the single-crystal study of the bulk magnetization and neutron-scattering measurements on a quantum $S=1/2$ spin ladders system $\text{IPA-Cu}{({\text{Cl}}_{0.95}{\text{Br}}_{0.05})}_{3}$ with quenched disorder. In zero field, the disordered spin liquid phase is preserved as in pure ${\text{IPA-CuCl}}_{3}$. Due to the bond randomness, a different Bose glass phase was directly observed in ${H}_{c}<H<{H}^{\ensuremath{'}}$, 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.
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Cited by 20 references