S
Steven Herbert
Researcher at Xavier University
Publications - 17
Citations - 444
Steven Herbert is an academic researcher from Xavier University. The author has contributed to research in topics: Quantum point contact & Spin polarization. The author has an hindex of 9, co-authored 17 publications receiving 418 citations. Previous affiliations of Steven Herbert include University of Cincinnati.
Papers
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Journal ArticleDOI
All-electric quantum point contact spin-polarizer
P. Debray,Saydur Rahman,J. Wan,R. S. Newrock,Marc Cahay,Anh T. Ngo,Sergio E. Ulloa,Steven Herbert,Mustafa Muhammad,Mark Johnson +9 more
TL;DR: In this article, strong spin polarization in side-gated quantum point contacts can be achieved electrically, making these structures attractive for future spintronic applications, and experimental evidence has been presented showing that spin polarization can be obtained electrically.
Journal Article
All-Electric Quantum Point Contact Spin Polarizer
TL;DR: Experimental evidence is presented that a quantum point contact -- a short wire -- made from a semiconductor with high intrinsic spin-orbit coupling can generate a completely spin-polarized current when its lateral confinement is made highly asymmetric.
Journal ArticleDOI
Observation of a 0.5 conductance plateau in asymmetrically biased GaAs quantum point contact
TL;DR: In this paper, the authors reported the observation of a robust anomalous conductance plateau near G 0 G 0 (G 0 2e2/h) in asymmetrically biased AlGaAs/GaAs quantum point contacts (QPCs), with in-plane side gates in the presence of lateral spin-orbit coupling.
Journal ArticleDOI
Influence of surface scattering on the anomalous conductance plateaus in an asymmetrically biased InAs/In(0.52)Al(0.48)As quantum point contact.
Partha Pratim Das,N. Bhandari,J. Wan,James Charles,Marc Cahay,K. B. Chetry,R. S. Newrock,Steven Herbert +7 more
TL;DR: The authors' simulations show that a spin conductance polarization as high as 98% can be achieved despite the presence of dangling bonds, and are interpreted as evidence for the sensitivity of the QPC spin polarization to defects and impurity generated during the etching process that forms theQPC side walls.
Journal ArticleDOI
Understanding the anomalous conductance plateau in asymmetrically biased InAs/In0.52Al0.48As quantum point contacts—A step towards a tunable all electric spin valve
TL;DR: In this paper, the appearance and evolution of an anomalous conductance plateau at 0.4 (2e2/h) in an In0.52Al0.48As/InAs quantum point contact (QPC), in the presence of lateral spin-orbit coupling, has been studied at T = 4.2 K as a function of the potential asymmetry between the in-plane gates of the QPC.