通讯机构：
[Tian, Ye] H;[Tian, Ye] U;Hunan City Univ, Sch Commun & Elect Engn, Yiyang 413000, Peoples R China.;Univ Ghent, Dept Informat Technol, Photon Res Grp, IMEC, B-9000 Ghent, Belgium.
关键词：
Meyer-Neldel rule;persistent photocurrent;trap-limited current
摘要：
A theoretical model is established to describe the emergence of the Meyer-Neldel rule (MNR) based on trap-limited current (TLC) theory. The model produces both MNR and anti-MNR behavior, and is available to various trap distributions. Moreover, TLC-based MNR is connected to persistent photocurrent (PPC) phenomenon. The information from MNR and PPC as well as their connection can be used to probe the distribution of the traps in materials.
期刊：
材料导报,2016年30(5):148-151 and 155 ISSN：1005-023X
作者机构：
[张学军; 蒋练军; 张光富] School of Communication and Electronic Engineering, Hunan City University, Yiyang, 413000, China;[张光富] School of Physics and Electronics, Central South University, Changsha, 410083, China
通讯机构：
[Tian, Ye] H;Hunan City Univ, Sch Commun & Elect Engn, Yiyang 413000, Hunan, Peoples R China.
关键词：
Effective refractive index;Near ultraviolet;Numerical simulation;Physical vapor deposition;Raman scattering;Thin films
摘要：
Hybrid nanostructures composed of plasmonic metal and semiconductor are receiving increasing attentions, owing to their unique optical features that are induced by the co-existence of localized surface plasmon resonance (SPR) and semiconduction as well as the synergistic interactions between these two components. Other than the structures based on conventional noble metals, a cost-effective structure based on non-noble metal is studied in this work. Utilizing the surface dewetting in Bi-Si system, the Bi-nanorod/Si-nanodots hybrid structure (BSHS) is prepared by alternated sputtering of Bi and Si at low rate. The shift, split, and high order excitation of SPRs in BSHS are studied combining numerical and theoretical simulation. Calculations of the optical extinction performed as a function of the size of BSHS show a guideline to tune its spectra.
摘要：
We study the physical-vapor-deposition of 1D bismuth nanostructures. Bi nanowire elongating along [012] and/or [110] direction as well as anisotropic Bi nano-columns are physical-vapor-deposited successfully. The coexistence and competition of surface diffusion and geometric shielding are critical to their formation as well as growth mode transition among them. Since physical-vapor-deposition is a vacuum process, we make use of it to fabricate the ohmic contact to prevent the damage to the bismuth nanostructures brought by the etching to their thick surface oxide layer.
摘要：
We theoretically study the electron transport properties for two coupled single-walled carbon nanotube quantum dots connected to metallic electrodes under the irradiation of an external electromagnetic field at low temperatures. Using the standard nonequilibrium Green's function techniques, we examine the time-averaged transmission coefficient and linear conductance. It is shown that by some numerical examples, the photon-assisted inter-dot coupling causes Fano resonance and the conductance of the system is sensitive to the external field parameters. The transport dependence on the external field parameters may be used to detect the high-frequency microwave irradiation.
