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Anharmonicity and Universal Response of Linear Carbon Chain Mechanical Properties under Hydrostatic Pressure
Name
PhysRevLett.125.105501.pdf
Description
Published version
Size
627.02 KB
Format
Adobe PDF
Checksum (MD5)
ff2416b07e840f42cc26ff2beea99daf
Author(s)
Sharma, K
Costa, NL
Kim, YA
Muramatsu, H
Barbosa Neto, NM
Martins, LGP
Kong, J
Paschoal, AR
Araujo, PT
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Version
Final published version
Abstract
© 2020 American Physical Society. Isolated linear carbon chains (LCCs) encapsulated by multiwalled carbon nanotubes are studied under hydrostatic pressure (P) via resonance Raman scattering. The LCCs' spectroscopic signature C band around 1850 cm-1 softens linearly with increasing P. A simple anharmonic force-constant model not only describes such softening but also shows that the LCCs' Young's modulus (E), Grüneisen parameter (γ), and strain ( µ) follow universal P-1 and P2 laws, respectively. In particular, γ also presents a unified behavior for all LCCs. To the best of our knowledge, these are the first results reported on such isolated systems and the first work to explore universal P-dependent responses for LCCs' E, µ, and γ.
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DOI of Published Version
10.1103/PhysRevLett.125.105501
