摘要
为了理解在三势垒结构中准束缚能级Ez和隧穿寿命对磁场的依赖性,采用传输矩阵的方法研究了在三势垒结构中的共振隧穿过程。分别研究了在三势垒结构中的透射几率特征和隧穿寿命。结果表明:随着中间势垒厚度L的增加,第一准束缚能级E1z增加,而第二准束缚能级E2z却减小。随着磁场强度B和朗道量子数n的增加,与第一和第二准束缚能级(E1z,E2z)对应的寿命τ缩短。对于B=15和n=15的情况,L对τ的影响很小。
To understand the dependence of the quasi-bound level energies Ez and the tunneling lifetime on the magnetic fields B,resonant tunneling in the triple-barrier structure was investigated by using the transfer matrix method.Transmission probability characteristics and the tunneling lifetime in the triple-barrier structure are investigated,respectively.The results showed that the first quasi-bound energy levels E1z increase,while the second quasi-bound energy levels E2z decrease with the increasing of the middle barrier thickness L.The lifetime τ of E1z and E2z is shortened with increasing of B and Landau quantum number n,and the effect of L on τ is weak for B = 15 and n = 15.
出处
《发光学报》
EI
CAS
CSCD
北大核心
2010年第3期341-347,共7页
Chinese Journal of Luminescence
基金
Supported by the Natural Science Foundation of Tianjin(09JCYBJC04100,08JCYBJC14800)
Science and TechnologyPlan Projects of the Ministry of Construction of China(2008-K7-10)
Chinese National Key Basic Research Special Fund(2010CB933801)~~
关键词
共振隧穿
三势垒结构
传输矩阵理论
resonant tunneling
triple-barrier structure
transfer matrix theory
