Transport Through Magnetic Quantum Point Contacts

被引：0

作者：

Day, Timothy E. ^{[1
]}

Cummings, Aron W. ^{[1
]}

Burke, Adam M. ^{[1
]}

Ferry, David K. ^{[1
]}

Goodnick, Stephen M. ^{[1
]}

Reno, John L. ^{[2
]}

机构：

[1] Arizona State Univ, Dept Elect Engn, Tempe, AZ 85287 USA

[2] Sandia Natl Labs, CINT Sci Dept, POB 5800, Albuquerque, NM 87185 USA

来源：

2009 9TH IEEE CONFERENCE ON NANOTECHNOLOGY (IEEE-NANO) | 2009年

关键词：

AlGaAs/GaAs; quantum point contact; in-plane magnetic field; spintronics; 0.7-structure; cobalt; CONDUCTANCE;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Hybrid magnetic quantum point contacts were fabricated in the plane of a high mobility AlGaAs/GaAs quantum well structure. The hybrid gates are magnetized in an applied in-plane magnetic field and generate both magnetic fringe fields and an electrostatic confining potential. Low-temperature electrical characterization yielded well-resolved conductance plateaus and a strong 0.7-structure in the absence of an applied field. However, the well-known spin polarization effect of a quantum point contact in an applied magnetic field was absent, possibly due to suppressed electron-electron interactions. In addition, a sharply magnetic field dependent washout of the conductance plateaus suggested evidence of a significant effect of the local fringe field on electron transport in the QPC region.

引用

页码：911 / 914

页数：4

共 50 条

[41] Phonon Transport through Point Contacts between Graphitic Nanomaterials
Yang, Juekuan
Shen, Meng
Yang, Yang
Evans, William J.
Wei, Zhiyong
Chen, Weiyu
Zinn, Alfred A.
Chen, Yunfei
Prasher, Ravi
Xu, Terry T.
Keblinski, Pawel
Li, Deyu
PHYSICAL REVIEW LETTERS, 2014, 112 (20)
[42] MACROSCOPIC QUANTUM INTERFERENCE EFFECTS THROUGH SUPERCONDUCTING POINT CONTACTS
ZIMMERMAN, JE
SILVER, AH
PHYSICAL REVIEW, 1966, 141 (01): : 367 - +
[43] Photoconductance through quantum point contacts: Exact numerical results
Maao, FA
Gorelik, LY
PHYSICAL REVIEW B, 1996, 53 (23): : 15885 - 15892
[44] Photoconductance through quantum point contacts: Exact numerical results
Maaoe, F. A.
Gorelik, L. Y.
Physical Review B: Condensed Matter, 53 (23):
[45] Conduction through point contacts in fractional quantum Hall liquid
Univ of Tokyo, Tokyo, Japan
Phys B Condens Matter, (426-429):
[46] Conduction through point contacts in fractional quantum Hall liquid
Ando, M
Endo, A
Katsumoto, S
Iye, Y
PHYSICA B-CONDENSED MATTER, 1998, 249 : 426 - 429
[47] Transfer matrix approach to photon-assisted quantum transport in quantum point contacts
Ohe, J
Yakubo, K
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1999, 68 (08) : 2729 - 2734
[48] Quantum Transport through Magnetic Bariers
JQYou LDZhang QBYang Institute of Solid State Physics Chinese Academy of Sciences Hefei Anhui Department of Physics Xiangtan University Xiangtan Hunan
电子显微学报, 1997, (04) : 61 - 64
[49] Charge fluctuations in quantum point contacts and chaotic cavities in the presence of transport
Pedersen, MH
van Langen, SA
Buttiker, M
PHYSICAL REVIEW B, 1998, 57 (03): : 1838 - 1846
[50] Spin-dependent transport and thermopower in ferromagnetic quantum point contacts
Li, YX
Li, BZ
PHYSICS LETTERS A, 2004, 330 (3-4) : 274 - 279

← 1 2 3 4 5 →