Gate-dependent Pseudospin Mixing in Graphene/boron Nitride Moire Superlattices

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Abstract:

Electrons in graphene are described by relativistic Dirac Weyl spinors with a two-component pseudospin. The unique pseudospin structure of Dirac electrons leads to emerging phenomena such as the massless Dirac cone, nomalous quantum Hall effect, and Klein tunnelling, in graphene. The capability to manipulate electron pseudospin is highly desirable for novel graphene electronics, and it requires precise control to differentiate the two graphene sublattices at the atomic level. Grapheneboron nitride moir superlattices, where a fast sublattice oscillation due to boron and nitrogen atoms is superimposed on the slow moire period, provides an attractive approach to engineer the electron pseudospin in graphene.

Author(s):
Shi, Zhiwen ; Jin, Chenhao ; Yang, Wei ; Ju, Long ; Horng, Jason ; Lu, Xiaobo ; Bechtel, Hans A. ; Martin, Michael C. ; Fu, Deyi ; Wu, Junqiao
Author Organization(s):
CALIFORNIA UNIV BERKELEY DEPT OF PHYSICS
Descriptive Note:
Journal article
Supplementary Note:
Published in Nature Physics, v10 p743-747, October 2014.
Pagination:
0006

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Contract/Grant Number(s):
N00014-13-1-0464
Monitor Series:
ONR
 Subject Terms
Joint Capability Areas:
JCA_6.3.3_Spectrum Management; JCA_6_Net Centric; JCA_1_Force Support; JCA_6.3_Net Management; JCA_1.2_Force Preparation; JCA_1.3_Human Capital Management; JCA_6.1_Information Transport; JCA_1.3.2_Personnel Management; JCA_1.2.3_Educating; JCA_JCA_4.1.2_Sustain the Force; JCA_4.1_Deployment and Distribution; JCA_8_Building Partnerships
Modernization Areas:
Microelectronics
Communities of Interest:
Advanced Electronics
Descriptor(s):
*BORON NITRIDES, *GRAPHENE, *MOIRE EFFECTS, *SPINTRONICS, *SUPERLATTICES, ABSORPTION, CHARGE CARRIERS, DIELECTRICS, ELECTRON ELECTRON INTERACTIONS, EXPERIMENTAL DATA, FERMIONS, GATES(CIRCUITS), HALL EFFECT, HYBRIDIZATION, INFRARED SPECTROSCOPY, PHOTOCONDUCTIVITY, TUNNELING(ELECTRONICS)
Field(s)/Group(s):
Physical Chemistry, Crystallography, Electricity and Magnetism, Atomic and Molecular Physics and Spectroscopy, Solid State Physics
Keyword(s):
*ELECTRON PSEUDOSPINS, MOIRE SUPERLATTICES, WAVEFUNCTION, AFM(ATOMIC FORCE MICROSCOPY)
Report Date:
2014 Aug 31
Creation Date:
2015 Jun 03