Evolution of Critical Scaling Behavior near a Ferromagnetic Quantum Phase Transition
Evolution of Critical Scaling Behavior near a Ferromagnetic Quantum Phase Transition
复制标题
DOI：
10.1103/physrevlett.103.076404
复制
发表时间：
2009-08-14
影响因子：
8.6
通讯作者：
Maple, M. B.
中科院分区：
文献类型：
--
作者：
Butch, N. P.;Maple, M. B.
磁临界标度在URu 2-xRexSi 2单晶不断演变的铁磁临界温度通过化学取代向零调谐。当接近量子相变时，临界指数γ和（delta - 1）与临界温度和有序矩一起减小到零，而指数β保持恒定。这种新的趋势区分URu 2-xRexSi 2从化学计量的量子临界铁磁体，似乎反映了近藤和铁磁相互作用之间的潜在竞争。
Magnetic critical scaling in URu2-xRexSi2 single crystals continuously evolves as the ferromagnetic critical temperature is tuned towards zero via chemical substitution. As the quantum phase transition is approached, the critical exponents gamma and (delta - 1) decrease to zero in tandem with the critical temperature and ordered moment, while the exponent beta remains constant. This novel trend distinguishes URu2-xRexSi2 from stoichiometric quantum critical ferromagnets and appears to reflect an underlying competition between Kondo and ferromagnetic interactions.