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Journal Article

Magnetic superstructure in the two-dimensional quantum antiferromagnet SrCu2(BO3)2

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Horvatić,  M.
High Magnetic Field Laboratory, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Berthier,  C.
High Magnetic Field Laboratory, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

/persons/resource/persons280308

Mila,  F.
Department Quantum Materials (Hidenori Takagi), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Kodama, K., Takigawa, M., Horvatić, M., Berthier, C., Kageyama, H., Ueda, Y., et al. (2002). Magnetic superstructure in the two-dimensional quantum antiferromagnet SrCu2(BO3)2. Science, 298(5592), 395-399.


Cite as: https://hdl.handle.net/21.11116/0000-000E-E307-A
Abstract
We report the observation of magnetic superstructure in a
magnetization plateau state of SrCu2(BO3)(2), a frustrated
quasi two-dimensional quantum spin system. The Cu and B nuclear
magnetic resonance (NMR) spectra at 35 millikelvin indicate an
apparently discontinuous phase transition from uniform
magnetization to a modulated superstructure near 27 tesla,
above which a magnetization plateau at 1/8 of the full
saturation has been observed. Comparison of the Cu NMR spectrum
and the theoretical analysis of a Heisenberg spin model
demonstrates the crystallization of itinerant triplets in the
plateau phase within a large rhomboid unit cell (16 spins per
layer) showing oscillations of the spin polarization. Thus, we
are now in possession of an interesting model system to study a
localization transition of strongly interacting quantum
particles.