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½ñÌì¿´ÎÄÏ×˵ ʯīϩµÄ¡°zero band gap¡±  "is promising for optoelectronic application because it breaks the¡°long wavelength limit¡± of other semiconductors which are transparent to the light with photon energy smaller than their band gaps."ÖмäÄǸö¡°long wavelength limit¡±ÊÇʲô¶«Î÷£¿³¤²¨¼«ÏÞÊǸöɶ°¡
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In electricity and magnetism, the long wavelength limit is the limiting case when the wavelength is much larger than the system size. This corresponds to the quasi-static case, and reduces to electrostatics and magnetostatics.
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