Berezinskii-Kosterlitz-Thouless type scenario in the molecular spin liquid ACr2O4(A = Mg, Zn, Cd)

被引：16
|
作者：
Hemmida, M. [1 ]
von Nidda, H. -A. Krug [1 ]
Tsurkan, Vladimir [1 ,2 ]
Loidl, A. [1 ]
机构：
[1] Univ Augsburg, Ctr Elect Correlat & Magnetism, Expt Phys 5, D-86135 Augsburg, Germany
[2] Moldavian Acad Sci, Inst Appl Sci, MD-2028 Kishinev, Moldova
来源：
PHYSICAL REVIEW B | 2017年 / 95卷 / 22期
关键词：
2-DIMENSIONAL SYSTEMS; NEUTRON-SCATTERING; TRIANGULAR LATTICE; GLASS-TRANSITION; PHASE-TRANSITION; BOSON PEAK; FRUSTRATION; ORDER; ANTIFERROMAGNET; RESONANCE;
D O I：
10.1103/PhysRevB.95.224101
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The spin relaxation in chromium spinel oxides ACr(2)O(4) (A = Mg, Zn, Cd) is investigated in the paramagnetic regime by electron spin resonance (ESR). The temperature dependence of the ESR linewidth indicates an unconventional spin-relaxation behavior, similar to spin-spin relaxation in the two-dimensional (2D) chromium-oxide triangular lattice antiferromagnets. The data can be described in terms of a generalized Berezinskii-Kosterlitz-Thouless (BKT) type scenario for 2D systems with additional internal symmetries. Based on the characteristic exponents obtained from the evaluation of the ESR linewidth, short-range order with a hidden internal symmetry is suggested.
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页数：6
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