常压下α-铀的费米面
Fermi Surface of Alpha-Uranium at Ambient Pressure
摘要：
在常压下，在0.020 K - 10 K和磁场-35 T的α-3电荷密度波（CDW）状态下，用de Haas-van Alphen方法测量了α-铀单晶的费米面。所得到的频率的角度依赖性进行了描述。测量有效质量，并确定丁格尔温度为0.74 K +/- 0.04 K。在α-3 CDW状态内的量子振荡的观察提供了新的洞察费米表面上的电荷密度波的效果。此外，我们没有观察到任何运输或磁化下降到0.020 K的超导性的签名，表明压力诱导的量子临界点的可能性，从正常的CDW相分离的超导圆顶。
英文摘要：
We have performed de Haas-van Alphen measurements of the Fermi surface of alpha-uranium single crystals at ambient pressure within the alpha-3 charge density wave (CDW) state from 0.020 K - 10 K and magnetic fields to 35 T using torque magnetometry. The angular dependence of the resulting frequencies is described. Effective masses were measured and the Dingle temperature was determined to be 0.74 K +/- 0.04 K. The observation of quantum oscillations within the alpha-3 CDW state gives new insight into the effect of the charge density waves on the Fermi surface. In addition we observed no signature of superconductivity in either transport or magnetization down to 0.020 K indicating the possibility of a pressure-induced quantum critical point that separates the superconducting dome from the normal CDW phase.
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