FERMI-LIQUID-LIKE STATE IN A HALF-FILLED LANDAU-LEVEL
FERMI-LIQUID-LIKE STATE IN A HALF-FILLED LANDAU-LEVEL
复制标题
DOI：
10.1103/physrevlett.72.900
复制
发表时间：
1994-02-07
影响因子：
8.6
通讯作者：
READ, N
中科院分区：
文献类型：
--
作者：
REZAYI, E;READ, N
用球面几何方法研究了半填充朗道能级中的电子系统。对于大小从N = 1到14个电子，通量N(phi)=2（N - 1）的系统，基态的角动量由Hund第二规则预测，该规则适用于零磁场下一个电子和两个涡旋的复合费米子。低洼激发也符合这种解释，试波函数给出了很好的重叠。双粒子相关函数在短距离处显示出显著的相关空穴，在远距离处显示出渐近振荡形式，如在费米液体中。
A system of electrons in a half-filled Landau level is investigated in spherical geometry. For systems of size from N = 1 to 14 electrons with flux N(phi)=2(N - 1) the angular momentum of the ground state is as predicted by Hund's second rule for composite fermions of one electron and two vortices at zero magnetic field. Low-lying excitations also fit this interpretation and trial wave functions give excellent overlaps. The two-particle correlation function shows a significant correlation hole at short distances and suggests an asymptotically oscillating form at long distances, as in a Fermi liquid.