论文标题
单锰邻苯胺分子晶体管中两阶段北野效应的进化和普遍性
Evolution and universality of Two-stage Kondo effect in single manganese phthalocyanine molecule transistors
论文作者
论文摘要
Kondo效应提供了一个重要的范式，以了解强相关的多体物理学。尽管在密集的研究下，围绕耦合和局部耦合都起着重要作用的系统中，围绕效应的某些重要特性仍然难以捉摸。在这里，我们报告了两个阶段近代效应的进化和普遍性，这是最简单的形式，其中两种耦合使用包含锰苯烷氨酸分子的单分子晶体管设备很重要。两阶段近托效应的临界温度t*涉及两个自旋的有效相互作用线性地演变。观察到的近多共振显示了所有可调参数的通用二次依赖性：温度，磁场和偏置电压。还鉴定了两级临界效应与自旋1/2临界效应的非平衡电导的差异。这项研究中学到的消息填补了指令实验证据表明，量子相变位点附近两阶段的近托共振的演变，并有助于理解强相关方案中复杂的分子电子光谱。
Kondo effect offers an important paradigm to understand strong correlated many-body physics. Although under intensive study, some of important properties of Kondo effect, in systems where both itinerant coupling and localized coupling play significant roles, are still elusive. Here we report evolution and universality of two stage Kondo effect, the simplest form where both couplings are important using single molecule transistor devices incorporating Manganese phthalocyanine molecules. Kondo temperature T* of two-stage Kondo effect evolves linearly against effective interaction of involved two spins. Observed Kondo resonance shows universal quadratic dependence with all adjustable parameters: temperature, magnetic field and biased voltages. The difference in nonequilibrium conductance of two stage Kondo effect to spin 1/2 Kondo effect is also identified. Messages learned in this study fill in directive experimental evidence of evolution of two-stage Kondo resonance near quantum phase transition point, and help in understanding sophisticated molecular electron spectroscopy in strong correlation regime.
