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
收藏
页码：708 / 710
页数：3
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