Effect of temperature and magnetic field on the 0.7 structure in a ballistic one-dimensional wire

被引：8

作者：

Thomas, KJ ^{[1
]}

Nicholls, JT ^{[1
]}

Pepper, M ^{[1
]}

Simmons, MY ^{[1
]}

Mace, DR ^{[1
]}

Ritchie, DA ^{[1
]}

机构：

[1] Cavendish Lab, Cambridge CB3 0HE, England

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2002年 / 12卷 / 1-4期

关键词：

ballistic; electron-electron interactions; 0.7; structure;

D O I：

10.1016/S1386-9477(01)00385-X

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Low temperature measurements of ballistic one-dimensional (1D) wires show an additional structure at 0.7(2e(2)/h) in the conductance characteristics (Phys. Rev. Lett, 77 (1996) 135: Phys. Rev. B 62 (2000) 10950). This 0.7 structure develops into a plateau at e(2)/h, if. either the in-plane magnetic field is increased (Phys. Rev. Lett. 77 ( 1996) 135) or the carrier density is decreased (Phys. Rev. B 61 (2000) 13 365). A suggested explanation for this effect is based on spin polarisation induced by many-body interactions. As temperature increases, the e(2)/h plateau in a magnetic field shifts to 0.6(2e(2)/h). whereas other plateaus remain unchanged. We study the effect of temperature on the evolution of the 0.7 structure with increasing in-plane magnetic field. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：708 / 710

页数：3