论文标题
在粒子孔 - 空气量子临界点上的动力planckian电荷响应的动力学缩放量表与围绕临界
Dynamical Planckian scaling of charge response at a particle-hole-asymmetric quantum critical point with Kondo destruction
论文作者
论文摘要
金属量子关键性是各种强相关系统中的中心主题。最近的实验提出了一个基本问题，即在量子质量关键性框架仅允许自旋通道中奇异性的情况下，电荷响应如何单数。在这个新出现的问题的推动下，我们研究了Bose-Fermi Anderson模型的粒子 - 孔 - 空气状态，并具有稳态形式的玻色子浴光谱和状态的费米子带密度。我们意识到了粒子 - 孔 - 对称量子 - 量子 - 由于对近托筛查的严重破坏而丢失了准粒子，并证明了电荷响应的动力学缩放。讨论了对重点量子关键的新制度以及对莫特 - 哈伯德系统的影响。
Metallic quantum criticality is a central theme in a variety of strongly correlated systems. Recent experiments have raised the fundamental question of how the charge response can be singular in cases where the Landau framework of quantum criticality allows singularity only in the spin channel. Motivated by this emerging issue, we study the particle-hole-asymmetric regime of a Bose-Fermi Anderson model with power-law forms for both the bosonic bath spectrum and the fermionic band density of states. We realize a particle-hole-asymmetric quantum-critical state where quasiparticles are lost due to a critical destruction of Kondo screening, and demonstrate a dynamical Planckian scaling of the charge response. Implications for a new regime of heavy-fermion quantum criticality and for Mott-Hubbard systems are discussed.
