当前位置: X-MOL 学术Nat. Phys. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Charge density wave quantum critical point with strong enhancement of superconductivity
Nature Physics ( IF 17.6 ) Pub Date : 2017-07-10 , DOI: 10.1038/nphys4191
Thomas Gruner , Dongjin Jang , Zita Huesges , Raul Cardoso-Gil , Gerhard H. Fecher , Michael M. Koza , Oliver Stockert , Andrew P. Mackenzie , Manuel Brando , Christoph Geibel

Quantum critical points (QCPs), at which a second-order phase transition is continuously suppressed to zero temperature, are currently one of the central topics in solid-state physics1,2. The strong interest emerges from observations of very unusual properties at QCPs such as the onset of unconventional superconductivity (SC)3. While QCPs found at the disappearance of magnetic order are quite common and intensively studied, a QCP that results from a structural transition is scarce and poorly investigated. Here, we report on the observation of a charge density wave (CDW) type of structural ordering in LuPt 2In with a second-order transition at TCDW = 490 K. Substituting Pd for Pt suppresses TCDW continuously towards T = 0, leading to a QCP at 58% Pd substitution. We find a strong enhancement of bulk SC just at the QCP, pointing to a new type of interaction between CDW and SC.



中文翻译:

电荷密度波量子临界点具有超强的增强作用

量子临界点(QCPs)是二阶相变被连续抑制到零温度的位置,目前是固态物理学1,2的中心主题之一。强烈的兴趣来自对QCP异常性质的观察,例如非常规超导电性(SC)3的出现。虽然在磁序消失时发现的QCP相当普遍并且经过深入研究,但由于结构转变而产生的QCP却很少,而且研究也很少。在这里,我们报告观察到LuPt 2 In中的电荷密度波(CDW)类型的结构有序,在T CDW = 490 K处发生了二级过渡。用Pd代替Pt会抑制T CDW连续地朝向T = 0,导致QCP的Pd取代率为58%。我们在QCP处发现了批量SC的强大增强,这表明CDW和SC之间存在一种新型的交互方式。

更新日期:2017-10-11
down
wechat
bug