Anomalous dephasing of two-dimensional electrons in an AlGaAs/GaAs parabolic quantum well structure

Gao, Kuang-Hong; Yu, G.; SpringThorpe, A. J.; Austing, D. G.; Lin, Tianquan; Hu, Guangfu; Dai, Ning; Chu, Junhao

doi:10.1016/j.ssc.2011.07.033

Cited by 4 publications

(1 citation statement)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…That the observed negative MR here can be described well by eq 1 may be due to a strong inter-sub-band scattering which makes the electrons behave as if they occupy a single sub-band. 78,79 Moreover, it should be mentioned that the very small μ values could reduce the speed and efficiency of information transmission due to a possible recombination of electron and holes if our samples were used to fabricate devices. Thus, the electron mobility should be enhanced by some methods (e.g., further suppressing the electron−phonon scattering), which needs further study.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Room-Temperature Quantum Transport Phenomenon in Low-Temperature-Grown Zn_1–xMg_xO/ZnO Heterostructures

Gao

Rong

et al. 2020

J. Phys. Chem. C

View full text Add to dashboard Cite

Quantum transport phenomenon such as quantum Hall effect usually appears up at cryogenic temperature. Here, we observe a room-temperature quantum transport phenomenon in ZnO-based two-dimensional systems. We successfully fabricate Zn1–x Mg x O/ZnO heterostructures by using magnetron sputtering with a low growth temperature which makes it feasible to obtain flexible heterostructures. Electrical transport properties of these heterostructures are studied. A parabolic negative magnetoresistance is clearly observed in a wide temperature range, which can be accurately described by the weak localization theory. By analyzing the temperature dependence of the dephasing length, it is found that the electron–electron scattering combined with two-dimensional electron–phonon scattering dominates the dephasing process for electrons. Importantly, the observed negative magnetoresistance persists up to 300 K. This indicates that room-temperature weak localization effect appears up, which can be attributed to weak electron–phonon scattering and small electron mobility. The present work provides a reference for realizing room-temperature quantum effect which is beneficial to develop quantum-interference devices.

show abstract

Section: ■ Results and Discussionmentioning

confidence: 99%

Room-Temperature Quantum Transport Phenomenon in Low-Temperature-Grown Zn_1–xMg_xO/ZnO Heterostructures

Gao

Rong

et al. 2020

J. Phys. Chem. C

View full text Add to dashboard Cite

show abstract

Negative and positive magnetoresistance in GaInNAs/GaAs modulation-doped quantum well structures

et al. 2014

View full text Add to dashboard Cite

Disorder dependence electron phonon scattering rate of V 82 Pd 18−x Fe x alloys at low temperature

Jana

Meikap

2018

Physics Letters A

View full text Add to dashboard Cite

Anomalous dephasing of two-dimensional electrons in an AlGaAs/GaAs parabolic quantum well structure

Cited by 4 publications

References 21 publications

Room-Temperature Quantum Transport Phenomenon in Low-Temperature-Grown Zn_1–xMg_xO/ZnO Heterostructures

Room-Temperature Quantum Transport Phenomenon in Low-Temperature-Grown Zn_1–xMg_xO/ZnO Heterostructures

Negative and positive magnetoresistance in GaInNAs/GaAs modulation-doped quantum well structures

Disorder dependence electron phonon scattering rate of V 82 Pd 18−x Fe x alloys at low temperature

Contact Info

Product

Resources

About

Anomalous dephasing of two-dimensional electrons in an AlGaAs/GaAs parabolic quantum well structure

Cited by 4 publications

References 21 publications

Room-Temperature Quantum Transport Phenomenon in Low-Temperature-Grown Zn1–xMgxO/ZnO Heterostructures

Room-Temperature Quantum Transport Phenomenon in Low-Temperature-Grown Zn1–xMgxO/ZnO Heterostructures

Negative and positive magnetoresistance in GaInNAs/GaAs modulation-doped quantum well structures

Disorder dependence electron phonon scattering rate of V 82 Pd 18−x Fe x alloys at low temperature

Contact Info

Product

Resources

About

Room-Temperature Quantum Transport Phenomenon in Low-Temperature-Grown Zn_1–xMg_xO/ZnO Heterostructures

Room-Temperature Quantum Transport Phenomenon in Low-Temperature-Grown Zn_1–xMg_xO/ZnO Heterostructures