【摘 要】
：
由于可能支持非阿贝尔准粒子从而实现拓扑量子计算,朗道能级填充因子为5/2的分数量子霍尔态的性质得到了理论和实验工作的广泛关注。从理论上看,5/2态很可能是Moore-Read
【机 构】
：
浙江大学物理系,浙江杭州,310027
【出 处】
：
第十九届全国凝聚态理论与统计物理学术会议
论文部分内容阅读
由于可能支持非阿贝尔准粒子从而实现拓扑量子计算,朗道能级填充因子为5/2的分数量子霍尔态的性质得到了理论和实验工作的广泛关注。从理论上看,5/2态很可能是Moore-Read Pfaffian态,或是它的粒子—空穴共轭态anti-Pfaffian态。尽管半填充的朗道能级有粒子—空穴对称性,这两个态都是粒子—空穴对称性破缺态。此外,两者都没有无可置疑的实验支持。这里,我报告一种介于两者之间的新的候选态,可以由Pfaffian与anti-Pfaffian的条带交替构成。这种条带相非常特别,是不可压缩的电荷绝缘体,但同时由于无能隙的电中性体激发存在,是热的导体。在无序的影响下,粒子—空穴对称性在全局或是平均的意义下存在。我会指出这种条带相和目前的理论和实验工作结果是吻合的,并且讨论可能的实验验证方法。
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