TY  - JOUR
A1  - Andrianov, Ivan
A1  - Saalfrank, Peter
T1  - Free vibrational relaxation of H adsorbed on a Si(100) surface investigated with the multi-configurational time-dependent Hartree method
JF  - Chemical physics letters
N2  - The results of a quantum-mechanical study of vibrational relaxation of hydrogen adsorbed on a Si(100) surface with the multi-configurational time-dependent Hartree (MCTDH) method are presented. A two-dimensional subsystem is coupled non-linearly to a bath of harmonic oscillators (phonons of the Si bulk), and the relaxation of subsystem vibrations proceeds primarily via a two-phonon process. Characteristic times of the system evolution agree well with our previous perturbation theory study. The vibrational population decay is non-exponential, exhibiting pronounced recurrences due to finite bath size. The dependence of the lifetimes of the vibrational levels on the bath size and on the coupling details is investigated.
Y1  - 2006
U6  - https://doi.org/10.1016/j.cplett.2006.11.067
SN  - 0009-2614
VL  - 433
SP  - 91
EP  - 96
PB  - Elsevier
CY  - Amsterdam
ER  -