Evolution toward Quantum Critical End Point in UGe2
Evolution toward Quantum Critical End Point in UGe2
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DOI：
10.1143/jpsj.80.083703
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发表时间：
2011-08-01
影响因子：
1.7
通讯作者：
Flouquet, Jacques
中科院分区：
文献类型：
--
作者：
Kotegawa, Hisashi;Taufour, Valentin;Flouquet, Jacques
我们报告霍尔电阻率和电阻率测量压力和磁场下的UGe 2铁磁（FM）三临界。霍尔电阻率灵敏地检测从顺磁（PM）相到FM相的一阶变磁转变，在大的压力范围内几乎达到量子临界端点（QCEP）。费米表面在PM-FM过渡的剧烈变化被检测到附近的QCEP，而一个强烈的修改，在字段中的变化的非弹性散射之间的电子被观察到朝向QCEP。与理论预测的比较。
We report on Hall resistivity and electrical resistivity measurements under pressure and magnetic field in UGe2 with ferromagnetic (FM) tricriticality. The Hall resistivity sensitively detects the first order metamagnetic transition from a paramagnetic (PM) phase to a FM phase in a large pressure range almost up to the quantum critical end point (QCEP). The drastic change in the Fermi surface at the PM-FM transition is detected up to the vicinity of the QCEP, while a strong modification in the field variation of the inelastic scattering between electrons is observed toward the QCEP. The comparison with the theoretical predictions is made.