Landau theory of coherent interphase interfaces.

Landau theory of coherent interphase interfaces.
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DOI:
10.1103/physrevb.38.12031
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发表时间:
1988-12
期刊:
Physical review. B, Condensed matter
影响因子:
--
通讯作者:
Rottman
Rottman
中科院分区:
其他
文献类型:
--
作者:
Rottman

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朗道理论用于研究两个不同相之间的(平面)相干界面。沿界面平面的平均晶格参数被约束为固定,而垂直于界面平面的晶格参数可能发生变化。通常,当(长程)应力存在于(至少)两个体相中的一个时,界面自由能$\ensuremath{\sigma}$和应力${f}_{\ mathm {ij}}$不再是与约定无关的量。使用一种特殊的约定(类似于吉布斯分割曲面),计算出$\ensuremath{\sigma}$、${f}_{\ mathm {ij}}$和界面轮廓。
Landau theory is used to study a (flat) coherent interface between two distinct phases. The average lattice parameter along the interface plane is constrained to be fixed, while the lattice parameter perpendicular to the plane may vary. When (long-range) stress is present in (at least) one of the two bulk phases, the interface free energy $\ensuremath{\sigma}$ and stress ${f}_{\mathrm{ij}}$ are no longer convention-independent quantities, in general. Using a particular convention (analogous to a Gibbs dividing surface), $\ensuremath{\sigma}$, ${f}_{\mathrm{ij}}$, and the interface profile are calculated.