Differential conductance oscillations in asymmetric quantum point contacts

被引：0
作者：
Zhang, Hao [1 ]
Wu, Phillip M. [2 ,3 ]
Chang, A. M. [1 ]
机构：
[1] Duke Univ, Dept Phys, Durham, NC 27708 USA
[2] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA
[3] Stanford Univ, Geballe Lab Adv Mat, Stanford, CA 94305 USA
来源：
PHYSICAL REVIEW B | 2015年 / 91卷 / 19期
关键词：
SPIN POLARIZATION;
D O I：
10.1103/PhysRevB.91.195150
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Small differential conductance oscillations as a function of source-drain bias are observed and systematically studied in an asymmetric quantum point contact. These oscillations become significantly suppressed in a small in-plane magnetic field (similar to 0.7 T) or at higher temperatures (similar to 800 mK). Qualitatively, their temperature evolution can be simulated numerically based on smearing of the Fermi distribution, whereas features near zero bias cannot. Single-particle scenarios are unsatisfactory in accounting for the oscillations, suggesting that they are likely caused by electron-and spin-correlation effects.
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页数：9
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