High-field ESR Studies of the Quantum Spin Dimer System Ba3Cr2O8

被引：9

作者：

Kamenskyi, D. ^{[1
]}

Wosnitza, J. ^{[1
]}

Krzystek, J. ^{[2
]}

Aczel, A. A. ^{[3
,4
]}

Dabkowska, H. A. ^{[3
]}

Dabkowski, A. B. ^{[3
]}

Luke, G. M. ^{[3
]}

Zvyagin, S. A. ^{[1
]}

机构：

[1] Helmholtz Zentrum Dresden Rossendorf, Dresden High Magnet Field Lab HLD, D-01328 Dresden, Germany

[2] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA

[3] McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada

[4] Oak Ridge Natl Lab, Quantum Condensed Matter Div, Neutron Sci Directorate, Oak Ridge, TN 37831 USA

来源：

JOURNAL OF LOW TEMPERATURE PHYSICS | 2013年 / 170卷 / 5-6期

关键词：

Electron spin resonance; Field-induced phase transition; Dimers; SRCU2(BO3)(2); TLCUCL3; STATE;

D O I：

10.1007/s10909-012-0722-4

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Results of systematic high-frequency electron spin resonance (ESR) studies of Ba3Cr2O8, a weakly coupled dimer system, in magnetic fields up to 25 T are reported. Two pairs of ESR gapped modes corresponding to transitions from a spin-singlet ground state to the first excited triplet states with gaps, Delta (AB) =563 GHz and Delta (CD) =399 GHz, are revealed below H (c1)=12.5 T. The detection of the ground-state excitations by means of ESR clearly indicates the presence of a non-secular term allowing these transitions. A complex structure of the microwave absorption spectrum in magnetic fields above H (c1) is observed, those peculiarities are discussed.

引用

页码：231 / 235

页数：5

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