Scientific article
Open access

Field-controlled magnetic order in the quantum spin-ladder system (Hpip)2CuBr4

Publication date2009

Neutron diffraction is used to investigate the field-induced, antiferromagnetically ordered state in the two-leg spin-ladder material (Hpip)2CuBr4. This “classical” phase, a consequence of weak interladder coupling, is nevertheless highly unconventional: its properties are influenced strongly by the spin Luttinger-liquid state of the ladder subunits. We determine directly the order parameter (transverse magnetization), the ordering temperature, the spin structure, and the critical exponents around the transition. We introduce a minimal microscopic model for the interladder coupling and calculate the quantum fluctuation corrections to the mean-field interaction.

  • arxiv : cond-mat.str-el
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Citation (ISO format)
THIELEMANN, B. et al. Field-controlled magnetic order in the quantum spin-ladder system (Hpip)<sub>2</sub>CuBr<sub>4</sub>. In: Physical review. B, Condensed matter and materials physics, 2009, vol. 79, n° 2. doi: 10.1103/PhysRevB.79.020408
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Article (Published version)
ISSN of the journal1098-0121

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