出典:Wiktionary
出典:『Wiktionary』 (2011/02/09 23:47 UTC 版)
bandgap (複数形 bandgaps)
出典:Wikipedia
出典:『Wikipedia』 (2011/07/02 13:51 UTC 版)
In solid state physics, a band gap, also called an energy gap or bandgap, is an energy range in a solid where no electron states can exist. In graphs of the electronic band structure of solids, the band gap generally refers to the energy difference (in electron volts) between the top of the valence band and the bottom of the conduction band in insulators and semiconductors. This is equivalent to the energy required to free an outer shell electron from its orbit about the nucleus to become a mobile charge carrier, able to move freely within the solid material. So the band gap is a major factor determining the electrical conductivity of a solid. Substances with large band gaps are generally insulators, those with smaller band gaps are semiconductors, while conductors either have very small band gaps or none, because the valence and conduction bands overlap.
後部.
the hinder part
帯のこ.
the blockade-line
the string section
a slot
the interstices of a network
a unknotted ring
broad-hipped
アメリカツガ
midiskirts
猫背の
stoop-shouldered
広葉の