期刊
PHYSICAL REVIEW B
卷 102, 期 12, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.102.125147
关键词
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资金
- NSF [1936221]
- Ministerio de Ciencia, Innovacion y Universidades/FEDER, Union Europea [RTI2018-098452-B-I00]
- MPS Multidisciplinary Activities
- Direct For Mathematical & Physical Scien [1936221] Funding Source: National Science Foundation
We derive a closed equation of motion for the one particle density matrix of a quantum system coupled to multiple baths using the Redfield master equation combined with a mean-field approximation. The steady-state solution may be found analytically with perturbation theory. Application of the method to a one-dimensional noninteracting quantum wire yields an expression for the current that reproduces the celebrated Landauer's formula. Nonlinear rectification is found for the case of a mesoscopic three-dimensional semiconductor p-n junction. The results are in good agreement with numerical simulations obtained using nonequilibrium Green's functions, supporting the validity of the Redfield equations for the description of transport.
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