Field dependence of the quantum ground state in the Shastry-Sutherland system SrCu$_2$(BO$_3$)$_2$

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dc.creatorLevy, F.
dc.creatorSheikin, I.
dc.creatorBerthier, C.
dc.creatorHorvatic, M.
dc.creatorTakigawa, M.
dc.creatorKageyama, H.
dc.creatorWaki, T.
dc.creatorUeda, Y.
dc.date2007-12-06
dc.date.accessioned2026-07-07T09:29:16Z
dc.date.available2026-07-07T09:29:16Z
dc.descriptionWe present magnetic torque measurements on the Shastry-Sutherland quantum spin system SrCu$_2$(BO$_3$)$_2$ in fields up to 31 T and temperatures down to 50 mK. A new quantum phase is observed in a 1 T field range above the 1/8 plateau, in agreement with recent NMR results. Since the presence of the DM coupling precludes the existence of a true Bose-Einstein condensation and the formation of a supersolid phase in SrCu$_2$(BO$_3$)$_2$, the exact nature of the new phase in the vicinity of the plateau remains to be explained. Comparison between magnetization and torque data reveals a huge contribution of the Dzyaloshinskii-Moriya interaction to the torque response. Finally, our measurements demonstrate the existence of a supercooling due to adiabatic magnetocaloric effects in pulsed field experiments.
dc.descriptionsubmitted to European Physical Letters
dc.identifierhttps://arxiv.org/abs/0712.0926
dc.identifierhttp://arxiv.org/abs/0712.0926
dc.identifierEurophysics Letters (EPL) 81 (2008) 67004
dc.identifierdoi:10.1209/0295-5075/81/67004
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/157721
dc.subjectStrongly Correlated Electrons
dc.titleField dependence of the quantum ground state in the Shastry-Sutherland system SrCu$_2$(BO$_3$)$_2$
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