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Title: Effect of intervalley interaction on band topology of commensurate graphene/EuO heterostructures

Authors:
; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1344009
Grant/Contract Number:
#DE-SC0012670
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 95; Journal Issue: 7; Related Information: CHORUS Timestamp: 2017-02-15 22:11:43; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Su, Shanshan, Barlas, Yafis, Li, Junxue, Shi, Jing, and Lake, Roger K. Effect of intervalley interaction on band topology of commensurate graphene/EuO heterostructures. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.95.075418.
Su, Shanshan, Barlas, Yafis, Li, Junxue, Shi, Jing, & Lake, Roger K. Effect of intervalley interaction on band topology of commensurate graphene/EuO heterostructures. United States. doi:10.1103/PhysRevB.95.075418.
Su, Shanshan, Barlas, Yafis, Li, Junxue, Shi, Jing, and Lake, Roger K. Wed . "Effect of intervalley interaction on band topology of commensurate graphene/EuO heterostructures". United States. doi:10.1103/PhysRevB.95.075418.
@article{osti_1344009,
title = {Effect of intervalley interaction on band topology of commensurate graphene/EuO heterostructures},
author = {Su, Shanshan and Barlas, Yafis and Li, Junxue and Shi, Jing and Lake, Roger K.},
abstractNote = {},
doi = {10.1103/PhysRevB.95.075418},
journal = {Physical Review B},
number = 7,
volume = 95,
place = {United States},
year = {Wed Feb 15 00:00:00 EST 2017},
month = {Wed Feb 15 00:00:00 EST 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevB.95.075418

Citation Metrics:
Cited by: 5works
Citation information provided by
Web of Science

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  • The paper presents the results of ab initio study of the opportunities for tuning the band structure, magnetic and transport properties of zigzag graphene nanoribbon (8-ZGNR) on hexagonal boron nitride (h-BN(0001)) semiconductor heterostructure by transverse electric field (E{sub ext}). This study was performed within the framework of the density functional theory (DFT) using Grimme's (DFT-D2) scheme. We established the critical values of E{sub ext} for the 8-ZGNR/h-BN(0001) heterostructure, thereby providing for semiconductor-halfmetal transition in one of electron spin configurations. This study also showed that the degeneration in energy of the localized edge states is removed when E{sub ext} is applied.more » In ZGNR/h-BN (0001) heterostructure, value of the splitting energy was higher than one in ZGNRs without substrate. We determined the effect of low E{sub ext} applied to the 8-ZGNR/h-BN (0001) semiconductor heterostructure on the preserved local magnetic moment (LMM) (0.3μ{sub B}) of edge carbon atoms. The transport properties of the 8-ZGNR/h-BN(0001) semiconductor heterostructure can be controlled using E{sub ext}. In particular, at a critical value of the positive potential, the electron mobility can increase to 7× 10{sup 5} cm{sup 2}/V s or remain at zero in the spin-up and spin-down electron subsystems, respectively. We established that magnetic moments (MMs), band gaps, and carrier mobility can be altered using E{sub ext}. These abilities enable the use of 8-ZGNR/h-BN(0001) semiconductor heterostructure in spintronics.« less
  • Cited by 1
  • We show that the critical charge for the Dirac excitations in gapless graphene depends on the spatial topology of the sample. In particular, for graphene cones, the effective value of the critical charge can tend toward zero for a suitable angle of the conical sample. We discuss the nature of the scattering phase shifts, quasibound state energies, and local density of states for a gapless graphene cone and determine the dependence of these physical quantities on the sample topology.