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题名: Quantum transport theory for the ac response of interacting resonant-tunneling devices
作者: Li, XQ ;  Su, ZB
刊名: PHYSICAL REVIEW B
出版日期: 1996
卷号: 54, 期号:15, 页码:10807-10813
关键词: TIME-DEPENDENT TRANSPORT ;  WIGNER-FUNCTION ;  ANDERSON MODEL ;  FREQUENCIES ;  CONDUCTANCE ;  EQUILIBRIUM ;  INDUCTANCE ;  VOLTAGE ;  SYSTEMS ;  FIELD
学科分类: Physics
通讯作者: Li, XQ , UNIV INSTELLING ANTWERP,DEPT PHYS,B-2610 ANTWERP,BELGIUM.
部门归属: ACAD SINICA,INST THEORET PHYS,BEIJING 100080,PEOPLES R CHINA
英文摘要: We present an analytical approach to the frequency response of the interacting resonant-tunneling devices (RTD's) to a small ac signal voltage. Within the wideband assumption for the lead electrons and Hartree approximation for the tunneling effect, we obtain a compact formula for the sc conductance. This has an interesting structure in that the geometry factor of the device is separated out from the interaction in the device. This feature allows us to get some physical insight into the effect of resonance and interaction on the ac response. In particular, we interpret the ac response in the physical picture of photon-assisted resonance between the Fermi surface and the central electron spectrum. The consistency between our result and other approaches is shown for the noninteracting system. We also apply our formula to the ac response of interacting RTD's, where the Hubbard electron-electron interaction in the resonant region is taken into account, and the remarkable features of charging effects on the ac response are presented.
收录类别: SCI
原文出处: 查看原文
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/12574
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Li, XQ,Su, ZB. Quantum transport theory for the ac response of interacting resonant-tunneling devices[J]. PHYSICAL REVIEW B,1996,54(15):10807-10813.
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