Role of Optical Phonons and Anharmonicity in the Appearance of the Heat Capacity Boson Peak-like Anomaly in Fully Ordered Molecular Crystals

We demonstrate that the heat capacity Boson peak (BP)-like anomaly appearing in fully ordered anharmonic molecular crystals emerges as a result of the strong interactions between propagating (acoustic) and low-energy quasi-localized (optical) phonons. In particular, we experimentally determine the l...

Full description

Saved in:
Bibliographic Details
Published in:The journal of physical chemistry letters 2022-06, Vol.13 (22), p.5061-5067
Main Authors: Krivchikov, Alexander I., Jeżowski, Andrezj, Szewczyk, Daria, Korolyuk, Oxsana A., Romantsova, Olesya O., Buravtseva, Lubov M., Cazorla, Claudio, Tamarit, Josep Ll
Format: Article
Language:English
Subjects:
Letter
Physical Insights into Materials and Molecular Properties
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We demonstrate that the heat capacity Boson peak (BP)-like anomaly appearing in fully ordered anharmonic molecular crystals emerges as a result of the strong interactions between propagating (acoustic) and low-energy quasi-localized (optical) phonons. In particular, we experimentally determine the low-temperature (
ISSN:1948-7185
1948-7185
DOI:10.1021/acs.jpclett.2c01224