Entropy Landscape of Phase Formation Associated with Quantum Criticality in Sr3Ru2O7

被引：124

作者：

Rost, A. W. ^{[1
]}

Perry, R. S. ^{[2
]}

Mercure, J. -F. ^{[1
]}

Mackenzie, A. P. ^{[1
]}

Grigera, S. A. ^{[1
,3
]}

机构：

[1] Univ St Andrews, Sch Phys & Astron, SUPA, St Andrews KY16 9SS, Fife, Scotland

[2] Univ Edinburgh, Sch Phys, Edinburgh EH9 3JZ, Midlothian, Scotland

[3] Univ Nacl La Plata, Consejo Nacl Invest Cient & Tecn, Inst Fis Liquidos & Sistemas Biol, RA-1900 La Plata, Argentina

来源：

SCIENCE | 2009年 / 325卷 / 5946期

基金：

英国工程与自然科学研究理事会;

关键词：

SUPERCONDUCTIVITY; INSTABILITY; STATE;

D O I：

10.1126/science.1176627

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Low-temperature phase transitions and the associated quantum critical points are a major field of research, but one in which experimental information about thermodynamics is sparse. Thermodynamic information is vital for the understanding of quantum many-body problems. We show that combining measurements of the magnetocaloric effect and specific heat allows a comprehensive study of the entropy of a system. We present a quantitative measurement of the entropic landscape of Sr3Ru2O7, a quantum critical system in which magnetic field is used as a tuning parameter. This allows us to track the development of the entropy as the quantum critical point is approached and to study the thermodynamic consequences of the formation of a novel electronic liquid crystalline phase in its vicinity.

引用

页码：1360 / 1363

页数：4

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