Quasi-particle properties from tunneling in the ν=5/2 fractional quantum Hall state

被引：274

作者：

Radu, Iuliana P. ^{[2
]}

Miller, J. B. ^{[1
]}

Marcus, C. M. ^{[1
]}

Kastner, M. A. ^{[2
]}

Pfeiffer, L. N. ^{[3
]}

West, K. W. ^{[3
]}

机构：

[1] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[2] MIT, Dept Phys, Cambridge, MA 02139 USA

[3] Bell Labs, Alcatel Lucent Technol, Murray Hill, NJ 07974 USA

来源：

SCIENCE | 2008年 / 320卷 / 5878期

关键词：

D O I：

10.1126/science.1157560

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Quasi-particles with fractional charge and statistics, as well as modified Coulomb interactions, exist in a two-dimensional electron system in the fractional quantum Hall (FQH) regime. Theoretical models of the FQH state at filling fraction nu = 5/2 make the further prediction that the wave function can encode the interchange of two quasi-particles, making this state relevant for topological quantum computing. We show that bias-dependent tunneling across a narrow constriction at nu = 5/2 exhibits temperature scaling and, from fits to the theoretical scaling form, extract values for the effective charge and the interaction parameter of the quasi-particles. Ranges of values obtained are consistent with those predicted by certain models of the 5/2 state.

引用

页码：899 / 902

页数：4

共 37 条

[21] Indications of a Luttinger liquid in the fractional quantum hall regime [J].