期刊
PHYSICAL REVIEW B
卷 84, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.84.064419
关键词
-
资金
- DFG
- B-IGSM
- NTH
- Humboldt foundation
- Korea NRF [2009-0093817]
- Augsburg-Munich [TRR80]
- National Research Foundation of Korea [2009-0093817] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
We report on an extended fluctuation regime in the spin dimer system Sr3Cr2O8 based on anomalies in Raman active phonons and magnetic scattering. The compound has two characteristic temperatures. The Jahn-Teller transition at T-S = 275 K is related to structural distortions and orbital ordering and the second instability at T* approximate to 150 K is due to further changes in the orbital sector. Below T-S quasielastic scattering marks strong fluctuations and in addition phonon anomalies are observed. For temperatures below T* we observe an exponential decrease of one phonon linewidth and determine a gap of the orbital excitations. At low temperatures the observation of two- and three-magnon scattering allows the determination of the spin excitation gap.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据