RESONATING VALENCE-BOND THEORY OF PHASE-TRANSITIONS AND SUPERCONDUCTIVITY IN LA2CUO4-BASED COMPOUNDS
RESONATING VALENCE-BOND THEORY OF PHASE-TRANSITIONS AND SUPERCONDUCTIVITY IN LA2CUO4-BASED COMPOUNDS
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DOI：
10.1103/physrevlett.58.2790
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发表时间：
1987-06-29
影响因子：
8.6
通讯作者：
HSU, T
中科院分区：
文献类型：
--
作者：
ANDERSON, PW;BASKARAN, G;HSU, T
我们确定了神秘的高T ''抽搐''过渡在La 2 CuO 4的平均场共振价键的Baskaran，邹，和安德森海森堡模型的转变。结构畸变是由对波函数的库仑关联引起的。在纯化合物中，自旋孤子的赝费米面在240 K时出现反铁磁性。我们简要地讨论了超导性和系统中激发的性质。
We identify the mysterious high-T ‘‘twitch’’transition in La 2 CuO 4 with the mean-field resonating-valence-bond transition of the Heisenberg model of Baskaran, Zou, and Anderson. The structure distortions are caused by Coulomb correlations of the pair wave function. In the pure compound the pseudo-Fermi surface of the spin soliton nests and antiferromagnetism occurs at 240 K. We discuss briefly superconductivity and the nature of excitations in the system.