金属纳米线结构中的量子化声子模式（英文）  

Quantized Acoustic-Phonon Modes in Metallic Nanowire Structures

作　　者：侯月霞[1] 徐文[1,2] 胡家光[1] 肖宜明[1] 

机构地区：[1]云南大学,云南昆明650091 [2]中国科学院固体物理研究所材料物理重点实验室,安徽合肥230031

出　　处：《稀有金属材料与工程》2015年第12期3019-3022,共4页Rare Metal Materials and Engineering

基　　金：Ministry of Science and Technology of China(National Key Scientific Instrument and Equipment Development Projects)(2011YQ130018);Department of Science and Technology of Yunnan Province

摘　　要：对金属纳米线结构中量子化的声学声子模式进行了详细的理论研究。利用柱形纳米线结构来描述以氧化铝为模板制备的金属镍纳米线。考虑器件结构中弹性声波对应的边界及连续条件,求解弹性波波动方程,可以得到纳米线结构中量子化的声学声子模式。发现量子化的声子能量和不同声子态之间的能量差会随着纳米线半径的减小而增大。在色散关系中,允许的声子模式位于q_zV_(Al2O3)这条直线的下方,这一特征不随纳米线半径的变化而改变。研究结果表明,金属纳米线系统在高频超声器件中具有潜在的应用前景。We conducted a detailed theoretical study on quantized acoustic-phone modes in metallic nanowile structures. Cylindrical metallic nanowire （NW） structures realized from the state-of-the-art nanotechnology, were used to demonstrate Ni NW embedded in Al2O3 template. The phonon modes were examined by solving the wave equations with corresponding boundary conditions. We find that the quantized phonon energy and the energy spacing between different phonon states increase with decreasing of NW radius. The allowed phonon modes lie below the straight line of qzVAl2O3 in the dispersion relation, and such a feature does not vary significantly with altering of NW radius. This study will be pertinent to the applications of metallic NW systems as high-frequency ultrasonic devices.

关 键 词：声学声子 金属纳米线 量子化的声子模式 

分 类 号：TB383.1[一般工业技术—材料科学与工程]