Jolie, Wouter, Lux, Jonathan, Poertner, Mathias, Dombrowski, Daniela, Herbig, Charlotte, Knispel, Timo, Simon, Sabina, Michely, Thomas, Rosch, Achim ORCID: 0000-0002-6586-5721 and Busse, Carsten ORCID: 0000-0001-5522-0578 (2018). Suppression of Quasiparticle Scattering Signals in Bilayer Graphene Due to Layer Polarization and Destructive Interference. Phys. Rev. Lett., 120 (10). COLLEGE PK: AMER PHYSICAL SOC. ISSN 1079-7114

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Abstract

We study chemically gated bilayer graphene using scanning tunneling microscopy and spectroscopy complemented by tight-binding calculations. Gating is achieved by intercalating Cs between bilayer graphene and Ir(111), thereby shifting the conduction band minima below the chemical potential. Scattering between electronic states (both intraband and interband) is detected via quasiparticle interference. However, not all expected processes are visible in our experiment. We uncover two general effects causing this suppression: first, intercalation leads to an asymmetrical distribution of the states within the two layers, which significantly reduces the scanning tunneling spectroscopy signal of standing waves mainly present in the lower layer; second, forward scattering processes, connecting points on the constant energy contours with parallel velocities, do not produce pronounced standing waves due to destructive interference. We present a theory to describe the interference signal for a general n-band material.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Jolie, WouterUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lux, JonathanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Poertner, MathiasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dombrowski, DanielaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Herbig, CharlotteUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Knispel, TimoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Simon, SabinaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Michely, ThomasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rosch, AchimUNSPECIFIEDorcid.org/0000-0002-6586-5721UNSPECIFIED
Busse, CarstenUNSPECIFIEDorcid.org/0000-0001-5522-0578UNSPECIFIED
URN: urn:nbn:de:hbz:38-192933
DOI: 10.1103/PhysRevLett.120.106801
Journal or Publication Title: Phys. Rev. Lett.
Volume: 120
Number: 10
Date: 2018
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 1079-7114
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
EPITAXIAL GRAPHENEMultiple languages
Physics, MultidisciplinaryMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/19293

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