Abstract
Neutron diffraction is used to investigate the field-induced, antiferromagnetically ordered state in the two-leg spin-ladder material (Hpip)(2)CuBr4. 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.
Original language | English |
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Journal | Physical Review B Condensed Matter |
Volume | 79 |
Issue number | 2 |
Pages (from-to) | 020408 |
ISSN | 0163-1829 |
DOIs | |
Publication status | Published - 2009 |
Bibliographical note
Copyright (2009) by the American Physical Society.Keywords
- Materials characterization and modelling
- Materials research