即平均场理论并不保证零能隙,平均场理论没有抓住无能隙激发后面隐含的原理

http://webcache.googleusercontent.com/search?q=cache:xbd7cfghwlYJ:www.oursci.org/bbs/read.php%3Ftid%3D3517%26page%3D2%26fpage%3D1+%22%E5%AF%B9%E7%A7%B0%E6%80%A7%E7%A0%B4%E7%BC%BA%E9%9D%9E%E9%9B%B6%E8%83%BD%E9%9A%99%E9%9B%86%E5%9B%A2%E6%BF%80%E5%8F%91%22&cd=9&hl=zh-CN&ct=clnk

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