Emergence of the Boson Peak in a Hybrid Framework Mediated by Hydrogen Bonds
= 1,3-diaminopropane; X = Cl, Br) as a clean platform free of phase transitions, glassiness, and any form of disorder. Low-temperature specific heat reveals a pronounced boson-peak-like anomaly with tunneling-state contributions down to 0.5 K. Crucially, the anomaly's temperature and intensity are directly modulated by hydrogen-bond strength, tuned via halide substitution (Cl → Br). Combined Raman spectroscopy and first-principles calculations trace its origin to an excess of low-frequency vibrations in the inorganic framework, induced by hydrogen-bond-mediated coupling between low-energy optical and acoustic phonons. Our work demonstrates that the boson peak can emerge intrinsically in a harmonic crystal lattice, providing a definitive structure-property relationship for controlling ∼1 THz vibrations via noncovalent interactions.
Authors
- Rui Luo (ORCID: https://orcid.org/0000-0002-4300-121X)
- Zhaolong Liu (ORCID: https://orcid.org/0009-0001-8597-102X)
- Xiaolong Chen (ORCID: https://orcid.org/0000-0001-8455-2117)
- Gao Y (ORCID: https://orcid.org/0000-0003-2059-3168)
- Shifeng Jin (ORCID: https://orcid.org/0000-0002-3522-1060)
- Munan Hao
Institutions
- Chinese Academy of Sciences (CN)
- Centre de Nanosciences et de Nanotechnologies (FR)
- Songshan Lake Materials Laboratory (CN)
- FZU ‒ Institute of Physics of the Academy of Sciences of the Czech Republic (CZ)
- National Center for Nanoscience and Technology (CN)
- National Laboratory for Superconductivity (CN)
- University of Chinese Academy of Sciences (CN)
Publication Details
- Journal
- Journal of the American Chemical Society
- Published
- 2026-04-27
- DOI
- https://doi.org/10.1021/jacs.6c00709
- Primary Topic
- Solid-state spectroscopy and crystallography
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Natural Science Foundation of China
- Chinese Academy of Sciences