重费米子中巡游反铁磁体的量子临界点
强关联电子
2007-05-23 v7 统计力学
摘要
通过单晶中子散射研究了重费米子Ce(Ru_{1-x}Rh_x)_2Si_2 (x = 0, 0.03)的量子临界点(QCP)。通过精确测量反铁磁波矢k_3 = 0.35 c^*处的动力学磁化率,我们证明了在低温范围内,能量宽度Gamma(k_3)(即逆关联时间)随温度的变化关系为Gamma(k_3) = c_1 + c_2 T^{3/2 +- 0.1},其中c_1和c_2是依赖于x的常数。该临界指数3/2 +- 0.1证明了QCP受巡游反铁磁体的QCP控制。
引用
@article{arxiv.cond-mat/0504386,
title = {Quantum Critical Point of Itinerant Antiferromagnet in Heavy Fermion},
author = {Hiroaki Kadowaki and Yoshikazu Tabata and Masugu Sato and Naofumi Aso and Stephane Raymond and Shuzo Kawarazaki},
journal= {arXiv preprint arXiv:cond-mat/0504386},
year = {2007}
}
备注
4 pages, 3 figures