Document Details

Document Type : Article In Journal 
Document Title :
Highly tunable spin-dependent electron transport through carbon atomic chains connecting two zigzag graphene nanoribbon
Highly tunable spin-dependent electron transport through carbon atomic chains connecting two zigzag graphene nanoribbon
 
Subject : physics 
Document Language : English 
Abstract : Motivated by recent experiments of successfully carving out stable carbon atomic chains from graphene, we investigate a device structure of a carbon chain connecting two zigzag graphene nanoribbons with highly tunable spin-dependent transport properties. Our calculation based on the non-equilibrium Green's function approach combined with the density functional theory shows that the transport behavior is sensitive to the spin configuration of the leads and the bridge position in the gap. A bridge in the middle gives an overall good coupling except for around the Fermi energy where the leads with anti-parallel spins create a small transport gap, while the leads with parallel spins give a finite density of states and induce an even-odd oscillation in conductance in terms of the number of atoms in the carbon chain. On the other hand, a bridge at the edge shows a transport behavior associated with the spin-polarized edge states, presenting sharp pure alpha-spin and beta-spin peaks beside the Fermi energy in the transmission function. This makes it possible to realize on-chip interconnects or spintronic devices by tuning the spin state of the leads and the bridge position 
ISSN : 0021-9606 
Journal Name : OURNAL OF CHEMICAL PHYSICS 
Volume : 137 
Issue Number : 10 
Publishing Year : 1433 AH
2012 AD 
Article Type : Article 
Added Date : Sunday, July 23, 2017 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
Yuehua XuXu, Yuehua InvestigatorDoctorate 
Bao-Ji WangWang, Bao-Ji ResearcherDoctorate 
San-Huang (Ke(Ke, San-Huang ResearcherDoctorateshke@tongji.edu.cn
Weitao YangYang, Weitao ResearcherDoctorate 
A. Z (Alzahrani(Alzahrani, A. Z ResearcherDoctorate 

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