NUMERICAL STUDY OF FRACTIONAL QUANTUM HALL ELECTRON-HOLE SYSTEMS - EVIDENCE OF STABLE ANYONIC IONS

被引：43

作者：

CHEN, XM ^{[1
]}

QUINN, JJ ^{[1
]}

机构：

[1] OAK RIDGE NATL LAB,OAK RIDGE,TN 37831

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.70.2130

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Spatially separated electron-hole layers in strong magnetic fields are studied by exactly diagonalizing the Hamiltonian of a small number of particles. When the separation between layers is of the same order as the intralayer particle separation, the ground-state energy of the system displays a pronounced cusp as a function of the Landau level degeneracy at an odd denominator fraction nu(c), where nu(c) = (nu(e) - nu(h))/(1 - nu(h)), and nu(e) and nu(h) are the electron and hole filling factors (nu(h) << nu(e)). Detailed analysis suggests that the ground state responsible for the cusp consists of stable ions (composed of Laughlin quasiparticles bound to a hole) weakly coupled to an incompressible fluid state of the remaining electrons.

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页码：2130 / 2133

页数：4

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