Scaling feature of magnetic field induced Kondo-peak splittings

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	Scaling feature of magnetic field induced Kondo-peak splittings
	Zhang, H ; Xie, XC ; Sun, QF
刊名	PHYSICAL REVIEW B
	2010
卷号	82 期号:7
关键词	NUMERICAL RENORMALIZATION-GROUP SINGLE-ELECTRON TRANSISTOR ANDERSON MODEL STATIC PROPERTIES ALLOYS TRANSPORT METALS
ISSN号	1098-0121
通讯作者	Zhang, H (reprint author), Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China.
中文摘要	By using the full density matrix approach to spectral functions within the numerical renormalization group method, we present a detailed study of the magnetic field induced splittings in the spin-resolved and the total spectral densities of a Kondo correlated quantum dot described by the single level Anderson impurity model. The universal scaling of the splittings with magnetic field is examined by varying the Kondo scale either by a change of local level position at a fixed tunnel coupling or by a change of the tunnel coupling at a fixed level position. We find that the Kondo-peak splitting Delta/T(K) in the spin-resolved spectral function always scales perfectly for magnetic fields B < 8T(K) in either of the two T(K)-adjusted paths. Scaling is destroyed for fields B > 10T(K). On the other hand, the Kondo peak splitting Delta/T(K) in the total spectral function does slightly deviate from the conventional scaling theory in whole magnetic field window along the coupling-varying path. Furthermore, we show the scaling analysis suitable for all field windows within the Kondo regime and two specific fitting scaling curves are given from which certain detailed features at low field are derived. In addition, the scaling dimensionless quantity Delta/2B and delta/2B are also studied and they can reach and exceed 1 in the large magnetic field region, in agreement with a recent experiment [T. M. Liu et al., Phys. Rev. Lett. 103, 026803 (2009)].
收录类别	SCI
资助信息	NSF-China [10734110, 10821403, 10974236]; China-973 program; U.S.-DOE [DE-FG02-04ER46124]
语种	英语
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/52315]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Zhang, H,Xie, XC,Sun, QF. Scaling feature of magnetic field induced Kondo-peak splittings[J]. PHYSICAL REVIEW B,2010,82(7).
APA	Zhang, H,Xie, XC,&Sun, QF.(2010).Scaling feature of magnetic field induced Kondo-peak splittings.PHYSICAL REVIEW B,82(7).
MLA	Zhang, H,et al."Scaling feature of magnetic field induced Kondo-peak splittings".PHYSICAL REVIEW B 82.7(2010).