A corner reflector of graphene Dirac fermions as a phonon-scattering sensor.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
03 06 2019
03 06 2019
Historique:
received:
07
01
2019
accepted:
30
04
2019
entrez:
5
6
2019
pubmed:
5
6
2019
medline:
5
6
2019
Statut:
epublish
Résumé
Dirac fermion optics exploits the refraction of chiral fermions across optics-inspired Klein-tunneling barriers defined by high-transparency p-n junctions. We consider the corner reflector (CR) geometry introduced in optics or radars. We fabricate Dirac fermion CRs using bottom-gate-defined barriers in hBN-encapsulated graphene. By suppressing transmission upon multiple internal reflections, CRs are sensitive to minute phonon scattering rates. Here we report on doping-independent CR transmission in quantitative agreement with a simple scattering model including thermal phonon scattering. As a signature of CRs, we observe Fabry-Pérot oscillations at low temperature, consistent with single-path reflections. Finally, we demonstrate high-frequency operation which promotes CRs as fast phonon detectors. Our work establishes the relevance of Dirac fermion optics in graphene and opens a route for its implementation in topological Dirac matter.
Identifiants
pubmed: 31160597
doi: 10.1038/s41467-019-10326-6
pii: 10.1038/s41467-019-10326-6
pmc: PMC6547877
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Pagination
2428Références
Phys Rev Lett. 2010 Mar 26;104(12):126801
pubmed: 20366555
Sci Rep. 2017 Aug 29;7(1):9714
pubmed: 28852078
Phys Rev Lett. 2017 Feb 10;118(6):066801
pubmed: 28234513
Proc Natl Acad Sci U S A. 2013 May 28;110(22):8786-9
pubmed: 23671093
Nano Lett. 2016 Nov 9;16(11):6988-6993
pubmed: 27704863
Nat Commun. 2016 Sep 27;7:12894
pubmed: 27671003
Sci Adv. 2015 Jul 31;1(6):e1500222
pubmed: 26601221
Sci Rep. 2016 Feb 16;6:21085
pubmed: 26879709
Science. 2016 Mar 4;351(6277):1055-8
pubmed: 26912363
Science. 2016 Sep 30;353(6307):1522-1525
pubmed: 27708099
Phys Rev Lett. 2012 Aug 3;109(5):056805
pubmed: 23006198
Phys Rev Lett. 2018 Sep 28;121(13):136804
pubmed: 30312074
Phys Rev Lett. 2018 Mar 23;120(12):124101
pubmed: 29694077
Nat Commun. 2017 Jun 09;8:15783
pubmed: 28598421
Nat Commun. 2017 May 15;8:15418
pubmed: 28504264
Proc Natl Acad Sci U S A. 2019 Apr 2;116(14):6575-6579
pubmed: 30877246
Nat Nanotechnol. 2011 Apr;6(4):222-5
pubmed: 21317890
Nat Commun. 2013;4:2342
pubmed: 23946010
ACS Nano. 2013 Nov 26;7(11):9808-13
pubmed: 24127633
Nano Lett. 2012 Sep 12;12(9):4460-4
pubmed: 22873738
Nano Lett. 2017 Apr 12;17(4):2280-2286
pubmed: 28231010
Phys Rev Lett. 2008 Oct 10;101(15):156804
pubmed: 18999625
J Phys Condens Matter. 2018 Feb 7;30(5):053001
pubmed: 29251624
J Phys Condens Matter. 2018 Jan 24;30(3):035501
pubmed: 29176042
ACS Nano. 2019 Feb 26;13(2):2558-2566
pubmed: 30689949
Nat Nanotechnol. 2018 Jan;13(1):47-52
pubmed: 29180743
Phys Rev Lett. 2018 Sep 28;121(13):136803
pubmed: 30312101
Phys Rev Lett. 2009 Jan 16;102(2):026807
pubmed: 19257307
Nano Lett. 2016 Feb 10;16(2):1387-91
pubmed: 26761190
Science. 2013 Nov 1;342(6158):614-7
pubmed: 24179223
Science. 2007 Mar 2;315(5816):1252-5
pubmed: 17332407
Phys Rev Lett. 2007 Jun 8;98(23):236803
pubmed: 17677928