Low-temperature infrared spectroscopy of H2 in crystalline C60

Abstract

Diffuse reflectance infrared spectroscopy is used to measure the quantum dynamics of molecular hydrogen trapped within a C60 lattice at temperatures as low as 10 K. Crystal field effects in conjunction with rotational translational coupling lead to a rich spectrum with multiply split peaks that are more than an order of magnitude sharper than at room temperature. The induced redshifts in the vibrational-rotational mode frequencies are explained using a simple model in which the state dependence of the H2 polarizability leads to changes in the C60-H2 interaction potential.

Publisher

American Physical Society

Publication Date

4-15-2006

Publication Title

Physical Review B

Department

Physics and Astronomy

Document Type

Article

DOI

https://dx.doi.org/10.1103/PhysRevB.73.155409

Language

English

Format

text

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