標題: Universal scaling of nonlinear conductance in the two-channel pseudogap Anderson model: Application for gate-tuned Kondo effect in magnetically doped graphene
作者: Lee, Tsung-Han
Zhang, Kenneth Yi-Jie
Chung, Chung-Hou
Kirchner, Stefan
電子物理學系
Department of Electrophysics
公開日期: 26-八月-2013
摘要: Based on the noncrossing approximation, we calculate both the linear and nonlinear conductance within the two-lead two-channel single-impurity Anderson model where the conduction electron density of states vanishes in a power-law fashion proportional to vertical bar omega - mu(F)vertical bar(r) with r = 1 near the Fermi energy, appropriate for a hexagonal system. For given gate voltage, we address the universal crossover from a two-channel Kondo phase, argued to occur in doped graphene, to an unscreened local moment phase. We extract universal scaling functions in conductance governing charge transfer through the two-channel pseudogap Kondo impurity and discuss our results in the context of a recent scanning tunneling spectroscopy experiment on Co-doped graphene.
URI: http://dx.doi.org/10.1103/PhysRevB.88.085431
http://hdl.handle.net/11536/22544
ISSN: 1098-0121
DOI: 10.1103/PhysRevB.88.085431
期刊: PHYSICAL REVIEW B
Volume: 88
Issue: 8
結束頁: 
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