Disorder unveils Mott quantum criticality behind a first-order transition in the quasi-two-dimensional organic conductor κ?(ET)2Cu[N(CN)2]Cl
Disorder unveils Mott quantum criticality behind a first-order transition in the quasi-two-dimensional organic conductor κ?(ET)2Cu[N(CN)2]Cl
复制标题
无序揭示了准二维有机导体κ?(ET)2Cu[N(CN)2]Cl一阶跃迁背后的莫特量子临界性
DOI：
10.1103/physrevb.99.245139
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发表时间：
2019
影响因子：
3.7
通讯作者：
Kanoda Kazushi
中科院分区：
文献类型：
--
作者：
Urai Mizuki;Furukawa Tetsuya;Seki Yasuhide;Miyagawa Kazuya;Sasaki Takahiko;Taniguchi Hiromi;Kanoda Kazushi
我们通过研究连续压力控制下系统性X射线照射的层状有机导体中的电子输运，展示了弱无序对莫特转变的显着影响。一阶Mott转变的临界终点被这种弱无序极大地抑制，这种弱无序仅导致无序敏感节点超导性的转变温度的轻微降低。相反，量子临界缩放的电阻保持在较低的温度和费米液体相干温度的金属侧降低。引入无序揭示了隐藏在一阶跃迁背后的相互作用诱导的量子临界性。
We show the significant impact of weak disorder on the Mott transition by investigating electronic transport in a systematically x-ray-irradiated layered organic conductor under continuous pressure control. The critical end point of the first-order Mott transition is dramatically suppressed by such weak disorder that causes only a minor reduction in the transition temperature of disorder-sensitive nodal superconductivity. Instead, quantum critical scaling of resistance holds at lower temperatures and Fermi-liquid coherence temperature on the metallic side is lowered. Introducing disorder unveils the interaction-induced quantum criticality hidden behind the first-order transition.