[問題] 拓樸絕緣體
想請問一下有關於拓樸絕緣體
拓樸絕緣體在boundary sate的時候是沒有能隙的類似於導體
那有一段話形容boudary state,不是很理解,
例如說 boudary是沒有能隙的在bulk能隙內是能帶傳播
這句話是什麼意思呢?
謝謝
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