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Journal Article

Bose glass behavior in (Yb1-xLux)4As3 representing randomly diluted quantum spin-1/2 chains

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Gegenwart,  P.
Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Steglich,  F.
Frank Steglich, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Kamieniarz, G., Matysiak, R., Gegenwart, P., Ochiai, A., & Steglich, F. (2016). Bose glass behavior in (Yb1-xLux)4As3 representing randomly diluted quantum spin-1/2 chains. Physical Review B, 94(10): 100403, pp. 1-5. doi:10.1103/PhysRevB.94.100403.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002B-9FDA-5
Abstract
The site-diluted compound (Yb1-xLux)(4)As-3 is a scarce realization of the linear Heisenberg antiferromagnet partitioned into finite-size segments and is an ideal model compound for studying field-dependent effects of quenched disorder in the one-dimensional antiferromagnets. It differentiates from the systems studied so far in two aspects-the type of randomness and the nature of the energy gap in the pure sample. We have measured the specific heat of single-crystal (Yb1-xLu (x))(4)As-3 in magnetic fields up to 19.5 T. The contribution C-perpendicular to arising from the magnetic subsystem in an applied magnetic field perpendicular to the chains is determined. Compared to pure Yb4As3, for which C-perpendicular to indicates a gap opening, for diluted systems a nonexponential decay is found at low temperatures which is consistent with the thermodynamic scaling of the specific heat established for a Bose-glass phase.