Quantum criticality in itinerant metamagnets

被引：11

作者：

Zacharias, Mario ^{[1
]}

Garst, Markus ^{[1
]}

机构：

[1] Univ Cologne, Inst Theoret Phys, D-50938 Cologne, Germany

来源：

PHYSICAL REVIEW B | 2013年 / 87卷 / 07期

关键词：

RUTHENATE SR3RU2O7; TRANSITION; SUSCEPTIBILITY;

D O I：

10.1103/PhysRevB.87.075119

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Critical thermodynamics close to a metamagnetic quantum critical end point (QCEP) in a metal is discussed within the framework of spin-fluctuation theory. We analyze the effective potential for the Ising order parameter that is renormalized by spin fluctuations and acquires a characteristic temperature dependence. The resulting magnetic field, H, and temperature, T, dependence of the magnetization, specific heat, thermal expansion, magnetostriction, susceptibility, and Gruneisen parameter are determined, and the crossover lines in the (H, T) phase diagram are specified. We point out that the metamagnetic QCEP is intrinsically unstable with respect to a magnetoelastic coupling. DOI: 10.1103/PhysRevB.87.075119

引用

页数：10

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