Tracer diffusion in cubic lattices
Journal Article
·
· Phys. Rev. B: Condens. Matter; (United States)
The multivariable Zwanzig-Mori formalism is used to study the tracer diffusion by nearest-neighbor jumps in cubic regular lattices. The effect of the nearest-neighbor correlations has been calculated exactly while the long-range correlations are computed within mode-coupling theory. The agreement between our results and the Monte Carlo results for the tracer correlation factor lies within 3% in the whole concentration range. An alternative method, the continued-fraction expansion of Mori, is also used. It has been shown that for self-diffusion the two-pole approximation is equivalent to the multivariable theory. Furthermore, through the successive steps in the continued-fraction, correlation effects from the first, second, and third steps of the jump of the tracer particle are also estimated.
- Research Organization:
- Department of Physics, Panjab University, Chandigarh 160014, India
- OSTI ID:
- 5372460
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 28:12; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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