EXPERIMENTAL-EVIDENCE FOR NEW PARTICLES IN THE FRACTIONAL QUANTUM HALL-EFFECT

被引：340

作者：

DU, RR ^{[1
]}

STORMER, HL ^{[1
]}

TSUI, DC ^{[1
]}

PFEIFFER, LN ^{[1
]}

WEST, KW ^{[1
]}

机构：

[1] AT&T BELL LABS,MURRAY HILL,NJ 07974

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.70.2944

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have determined the energy gaps of both prominent sequences of fractional quantum Hall effect (FQHE) states at filling factor nu=p/(2p +/- 1) around nu=1/2. The gaps increase linearly with DELTAB, the deviation of the magnetic field from half filling. Therefore, the data are indistinguishable from Shubnikov-de Haas oscillations of particles of charge e, effective mass m*, and lifetime broadening GAMMA exposed to an effective magnetic field DELTAB. Our findings are remarkably consistent with recent proposals of composite particles in the FQHE and the existence of a Fermi surface at even-denominator fillings.

引用

页码：2944 / 2947

页数：4

共 24 条

[1]

Chakraborty T., 1988, FRACTIONAL QUANTUM H

[2] HIERARCHICAL-CLASSIFICATION OF FRACTIONAL QUANTUM HALL STATES [J].