Exact formula of the bridge-mediated donor-acceptor effective coupling

被引：1
|
作者：
Bicout, DJ
Varchon, F
Kats, E
机构：
[1] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France
[2] ENVL, TIMC, Biomath & Epidemiol, F-69280 Marcy Letoile, France
[3] RAS, LD Landau Theoret Phys Inst, Moscow 117940, Russia
来源：
EUROPHYSICS LETTERS | 2005年 / 70卷 / 04期
关键词：
D O I：
10.1209/epl/i2005-10018-2
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
An exact expression of the bridge-mediated donor-acceptor effective coupling, H(da), is derived. For systems represented by a tight-binding Hamiltonian with nearest-neighbor interactions, we show that vertical bar H(da)vertical bar(2) is equal to the product over all squares of nearest-neighbor couplings divided by an appropriate product of level spacing of eigen energies of the Hamiltonian. These results are subsequently compared with those obtained using perturbation approaches.
引用
收藏
页码：457 / 463
页数：7
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