Two dimensional electron system in ferroelectrics, polar dielectrics and alkali halides

W. Kinase Department of Physics, School of Science and Engineering, Waseda University, 3-Okubo, Shinjuku-ku, Tokyo, 169, Japan

K. Takahashi Department of Physics, School of Science and Engineering, Waseda University, 3-Okubo, Shinjuku-ku, Tokyo, 169, Japan

K. Ashikaga Department of Physics, School of Science and Engineering, Waseda University, 3-Okubo, Shinjuku-ku, Tokyo, 169, Japan

Y. Onozuka Department of Physics, School of Science and Engineering, Waseda University, 3-Okubo, Shinjuku-ku, Tokyo, 169, Japan

S. Matsumoto Department of Physics, School of Science and Engineering, Waseda University, 3-Okubo, Shinjuku-ku, Tokyo, 169, Japan

T. Okamoto Department of Physics, School of Science and Engineering, Waseda University, 3-Okubo, Shinjuku-ku, Tokyo, 169, Japan

Abstract

The incommensurate (IC) state in ferroelectrics is discussed based upon the two-dimensional (2D) electron-hole system, which neutralizes the spontaneous polarization P₅ under the condition of D² P₅ = e, where D means the lattice constant of the 2D square electron system and also corresponds to the period of the IC state. Further the triangular and hexagonal 2D electron lattices are considered to explain the IC state between the a and (3 phases in quartz and to explain the possible mechanism in the exposure process in (111) Ag plane in AgBr.

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Two dimensional electron system in ferroelectrics, polar dielectrics and alkali halides

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Two dimensional electron system in ferroelectrics, polar dielectrics and alkali halides

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