Field-Controlled Magnetic Order in the Quantum Spin-Ladder System Hpip2CuBr4 - Condensed Matter > Strongly Correlated ElectronsReportar como inadecuado




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Abstract: Neutron diffraction is used to investigate the field-induced,antiferromagnetically ordered state in the two-leg spin-ladder materialHpip2CuBr4. This -classical- phase, a consequence of weak interladdercoupling, is nevertheless highly unconventional: its properties are influencedstrongly by the spin Luttinger-liquid state of the ladder subunits. Wedetermine directly the order parameter transverse magnetization, the orderingtemperature, the spin structure, and the critical exponents around thetransition. We introduce a minimal, microscopic model for the interladdercoupling and calculate the quantum fluctuation corrections to the mean-fieldinteraction.



Autor: B. Thielemann, Ch. Rüegg, K. Kiefer, H.M. Rønnow, B. Normand, P. Bouillot, C. Kollath, E. Orignac, R. Citro, T. Giamarchi, A. M

Fuente: https://arxiv.org/







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