…The electrical resistance of metals, except in the low-temperature region, is due to electrons interacting with phonons and scattering. As the temperature increases, scattering becomes stronger, and the electrical resistance increases. In ferroelectrics in which the phase transition is accompanied by atomic displacement, the frequency of a specific optical mode approaches 0 abruptly just above the transition temperature, and this is called a soft mode. [Toshiyuki Ninomiya] … *Some of the terminology that mentions "soft mode" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…低温域を除く金属の電気抵抗は電子がフォノンと相互作用して散乱されることによるもので,温度が高くなると強く散乱されるようになり,電気抵抗は増加する。強誘電体で,相転移が原子の変位を伴うものでは,転移温度の少し上から急激に特定の光学モードの振動数が0に近づき,これをソフトモードsoft modeという。【二宮 敏行】。… ※「soft mode」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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