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自旋对SIC半导体二维磁极化子基态能量的影响
Influences of Electron Spin on Ground State Energy of Weak-coupling 2-D Magnetopolaron in SiC Semiconductor
【摘要】 应用线性组合算符和微扰法研究了电子自旋对SIC半导体性质的影响。基态能量E0+(对应于电子自旋量子数为正)和E0-(对应于电子自旋量子数为负)都随磁场增加而线性减少:在0 T时,E0+和E0-都为-76.24 MEV;在25 T时,E0+和E0-分别为-68.50 MEV和-71.39 MEV。自旋能量与E0+和E0-之比P0+和P0-都随磁场增加而快速增加:在0 T时,P0+和P0-都为0;在20 T时,P0+为0.627;在25 T时,P0-为0.453。自旋能量与LANDAU基态能量之比P2始终为0.23。自旋能量与自能和声子之间相互作用能量之比P1和P3都随磁场增加而线性增加:在0 T时,P1和P3都为0;在5 T时,P3为0.628;在40 T时,P1为0.306。这些数据和结果有助于设计和研制自旋场效应晶体管、自旋发光二极管和自旋共振隧道器件等。
【Abstract】 Using linear combination operator and perturbation method,the influences of electron spin on the properties of SiC is studied.Ground state energy E+0(E-0) that the spin quantum number is plus(minus) decreases linearly with the magnetic field B increasing.E+0 and E-0 are-76.24 meV at 0 T.E+0(E-0) is-68.50 meV(-71.39 meV) at 25 T.The ratio P+0(P-0) of spin energy to E+0(E-0) increases rapidly with B increasing.P+0 and P-0 are 0 at 0 T.P+0(P-0) is 0.627(0.453) at 20 T(25 T).The ratio P2 of spin energy to Landau ground state energy is always 0.23.The ratio P1(P3) of spin energy to self-energy(energy of interaction between phonons) increases linearly with B increasing.P1 and P3 are 0 at 0 T.P1(P3) is 0.306(0.628) at 40 T(5 T).These data and results are helpful to design and develop spin field effect transistor,spin light-emitting diode,spin resonant tunneling device,etc.
【Key words】 SiC; semiconductor; electron spin; weak-coupling 2-D magnetopolaron; ground state energy;
- 【文献出处】 光电子·激光 ,Journal of Optoelectronics.laser , 编辑部邮箱 ,2006年02期
- 【分类号】O471.3
- 【下载频次】89