Non - Lorentzian hole shape induced by spectral diffusion in H2-protoporphyrin substituted myoglobin

Abstract

The temperature cycling hole-burning experiment is a good means to study the irreversible structural relaxation in disordered materials [1,2]. By observing the hole shape as well as the hole area and the hole width carefully, we investigated the relaxation of two-level-systems (TLS) that is characteristic of protein.