2pFand4pFInstabilities in the One-Dimensional Electron Gas
2pFand4pFInstabilities in the One-Dimensional Electron Gas
复制标题
一维电子气中的 2pF 和 4pF 不稳定性
DOI：
10.1103/physrevlett.50.1168
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发表时间：
1983
影响因子：
8.6
通讯作者：
D. Scalapino
中科院分区：
文献类型：
--
作者：
J. Hirsch;D. Scalapino
用蒙特卡罗方法研究了一维1/4填充的扩展Hubbard模型中的电荷和自旋密度响应函数。结果表明，库仑相互作用抑制了2pF的电荷密度奇异性，而增强了2pF的自旋密度奇异性。只有当除了现场斥力外，还存在较长距离的相互作用时，4pF响应才是可察觉的。将所得结果与弱耦合重整化群理论进行了比较。
Charge-and spin-density response functions in the one-dimensional ¼-filled extended Hubbard model have been studied by use of a Monte Carlo technique. The results show that Coulomb interactions suppress the 2 p F charge-density singularity, while they enhance the 2 p F spin-density singularity. The 4 p F response is only appreciable if, in addition to on-site repulsion, longer-range interactions exist. The present results are compared with weak-coupling renormalization-group predictions.