Quantum criticality and inhomogeneous magnetic order in Fe-doped alpha-YbAlB4
Quantum criticality and inhomogeneous magnetic order in Fe-doped alpha-YbAlB4
复制标题
Fe 掺杂 α-YbAlB4 中的量子临界性和不均匀磁序
DOI：
10.1103/physrevb.93.214421
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发表时间：
2016
影响因子：
3.7
通讯作者：
Zhang Jian
中科院分区：
文献类型：
--
作者：
MacLaughlin D. E.;Kuga K.;Shu Lei;Bernal O. O.;Ho P. -C.;Nakatsuji S.;Huang K.;Ding Z. F.;Tan C.;Zhang Jian
中间价多晶型体-铁掺杂诱导量子临界和磁序在这两个化合物.我们报道了μ子自旋弛豫的实验结果.因此，我们没有发现磁序低于25 mK的证据。在100 mK-2 K的温度范围内，μ子自旋的动态弛豫速率与温度呈幂律关系，这与反铁磁理论（AFM）和价量子临界行为理论的预测不一致。对于，其中AFM秩序的发展在7.5-10 K的温度范围内，我们发现共存的介观或宏观隔离的顺磁和AFM相，在后者相当大的障碍下降到2 K。
The intermediate-valent polymorphs- andexhibit quantum criticality and other novel properties not usually associated with intermediate valence. Iron doping induces quantum criticality inand magnetic order in both compounds. We report results of muon spin relaxation () experiments inand 0.25. Forwe find no evidence for magnetic order down to 25 mK. The dynamic muon spin relaxation rateexhibits a power-law temperature dependence, in the temperature range 100 mK–2 K, in disagreement with predictions by theories of antiferromagnetic (AFM) or valence quantum critical behavior. For, where AFM order develops in the temperature range 7.5–10 K, we find coexistence of meso- or macroscopically segregated paramagnetic and AFM phases, with considerable disorder in the latter down to 2 K.