[問題] 關於brillioun zone 的一些問題
在超導體中
如果用brillioun zone 的 diagram來描述磁性的話
我們知道(0.pi)到(pi.0)是antiferromagnetic zone boundary
那為什麼(0.0)這點是ferromagnetic (pi.pi)則是antiferro??
我疑惑的問題在於
(pi.pi)這點不是已經在費米面外了
但是超導的基態 不是應該是反磁性嗎?
如果上面說的不是基態跟激發態
而想說的是一塊材料中的不同電子狀態
那我更不懂了
為什麼同一個材質及溫度的材料
在不同區域會有兩種不同的狀態??
我有找過書 也上網找過
好像都沒看到比較詳細的說法
我覺得應該是我完全搞錯了這個圖的意思
有人可以幫我解答疑惑或是丟有詳細介紹這在幹嘛的網站給我嗎???
感恩不盡QQQQ
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