Doniach Phase Diagram, Revisited: From Ferromagnet to Fermi Liquid in Pressurized CeRu{sub 2} Ge{sub 2}
Doniach Phase Diagram, Revisited: From Ferromagnet to Fermi Liquid in Pressurized CeRu{sub 2} Ge{sub 2}
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DOI：
10.1103/physrevlett.82.2963
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发表时间：
1999-04
影响因子：
8.6
通讯作者：
S. Süllow;M. Aronson;B. Rainford;P. Haen
中科院分区：
文献类型：
--
作者：
S. Süllow;M. Aronson;B. Rainford;P. Haen
本文给出了CeRu[sub 2]Ge [sub 2]在压力p达130千帕时的电阻率和交流磁化率。压力将系统从铁磁体转变为无序费米液体（FL）。在p[sub c]=67 kbar时，磁序的抑制伴随着非费米液体（NFL）行为。通过将我们的结果与等电子CeRu[sub 2]（Ge[sub 1[minus]x]Si [sub x]）[sub 2]进行比较，我们得到了整个材料类的统一杂化J相图。相图的特征在于FL和Kondo能量标度T[sub FL]和T[sub K]，NFL行为出现在T[sub FL]=0 K时，而T[sub K]保持有限并且是J的平滑递增函数。[版权所有] [ital 1999] [ital The American Physical Society]
We present the resistivity and ac susceptibility of CeRu[sub 2]Ge [sub 2] at pressures p up to 130thinspthinspkbar. Pressure transforms the system from a ferromagnet into a nonordering Fermi liquid (FL). The suppression of magnetic order at p[sub c]=67 kbar is accompanied by non-Fermi liquid (NFL) behavior. By comparing our results to isoelectronic CeRu[sub 2]( Ge[sub 1[minus]x]Si [sub x])[sub 2] we derive a unified hybridization J phase diagram for the entire material class. The phase diagram is characterized by the FL and Kondo energy scales T[sub FL] and T[sub K] , with the NFL behavior appearing at T[sub FL]=0 K , while T[sub K] remains finite and a smoothly increasing function of J . [copyright] [ital 1999] [ital The American Physical Society]