Mirror-symmetry-induced pseudospin filtering of phonons in graphene nanoribbons

Unlike electrons, phonons do not have the charge and spin degrees of freedom. Consequently, it is a big challenge for the control of phonon currents and the design of quantum phonon devices due to the lack of versatile degrees of freedom. In this work, we show that phonon bands of mirror-symmetric m...

Full description

Saved in:
Bibliographic Details
Published inNew journal of physics Vol. 26; no. 10; pp. 103035 - 103045
Main Authors Chen, Xiaobin, Cui, Shiyu, Hu, Yizhi, Yan, Kun
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.10.2024
Subjects
Degrees of freedom
Electron spin
Electrons
Filtration
Graphene
Heat conductivity
Heterojunctions
mirror symmetry
Nanoribbons
Parity
Phonons
pseudospin
Symmetry
Online AccessGet full text

Cover

More Information
Summary:Unlike electrons, phonons do not have the charge and spin degrees of freedom. Consequently, it is a big challenge for the control of phonon currents and the design of quantum phonon devices due to the lack of versatile degrees of freedom. In this work, we show that phonon bands of mirror-symmetric materials can be labeled by parities, which can act as a pseudospin of phonons. As a proof-of-concept, we show that perfect pseudospin filtering can be realized using mirror-symmetric graphene-nanoribbon heterojunctions. In addition, we show that the filtering takes place within a remarkably short length scale of just 3 nanometers. Our work reveals an intriguing new facet of phonon behavior and also underscores the immense potential of utilizing phonons as information carriers.
Bibliography:NJP-117781.R1
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:1367-2630
1367-2630
DOI:10.1088/1367-2630/ad8957