Quantum magnetism and quantum phase transitions

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Magnetic order and spin-waves in the quasi-1D S=1/2 antiferromagnet ${\bf BaCu_{2}Si_{2}O_{7}}$

(2000)

Authors:

M Kenzelmann, A Zheludev, S Raymond, E Ressouche, T Masuda, P Böni, K Kakurai, I Tsukada, K Uchinokura, R Coldea
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Magnetic order and spin-waves in the quasi-1D S=1/2 antiferromagnet ${\bf BaCu_{2}Si_{2}O_{7}}$

ArXiv cond-mat/0012452 (2000)

Authors:

M Kenzelmann, A Zheludev, S Raymond, E Ressouche, T Masuda, P Böni, K Kakurai, I Tsukada, K Uchinokura, R Coldea

Abstract:

Elastic and inelastic neutron scattering were used to study the ordered phase of the quasi-one-dimensional spin-1/2 antiferromagnet ${\rm BaCu_{2}Si_{2}O_{7}}$. The previously proposed model for the low-temperature magnetic structure was confirmed. Spin wave dispersion along several reciprocal-space directions was measured and inter-chain, as well as in-chain exchange constants were determined. A small gap in the spin wave spectrum was observed and attributed to magnetic anisotropy effects. The results are discussed in comparison with existing theories for weakly-coupled quantum spin chain antiferromagnets.
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ChemInform Abstract: Onset of Antiferromagnetism in Heavy‐Fermion Metals

ChemInform Wiley 31:50 (2000) no-no

Authors:

A Schroeder, G Aeppli, R Coldea, M Adams, O Stockert, H von Loehneysen, E Bucher, R Ramazashvili, P Coleman
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Multi-particle States in Spin-1 Chain System CsNiCl3

(2000)

Authors:

M Kenzelmann, RA Cowley, WJL Buyers, R Coldea, JS Gardner, M Enderle, DF McMorrow, SM Bennington
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Onset of antiferromagnetism in heavy fermion metals

(2000)

Authors:

A Schroder, G Aeppli, R Coldea, M Adams, O Stockert, HV Lohneysen, E Bucher, R Ramazashvili, P Coleman
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