AI Article Synopsis
- The paper discusses a method for measuring electronic and phonon coherence simultaneously, despite their different time scales.
- The findings reveal that electronic coherence in a GaAs crystal lasts around 40 femtoseconds, while in a Bi crystal, it disappears in about 10 femtoseconds.
- In contrast, the phonon coherence in the Bi crystal persists much longer, on the order of picoseconds, highlighting the differences in coherence longevity between semiconductors and semimetals.
Article Abstract
Electronic and phonon coherence are usually measured in different ways because their time-scales are very different. In this paper we simultaneously measure the electronic and phonon coherence using the interference of the electron-phonon correlated states induced by two phase-locked optical pulses. Interferometric visibility showed that electronic coherence remained in a semiconducting GaAs crystal until ~40 fs; in contrast, electronic coherence disappeared within 10 fs in a semimetallic Bi crystal at room temperature, differing substantially from the long damping time of its phonon coherence, in the picosecond range.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3964516 | PMC |
| http://dx.doi.org/10.1038/srep04456 | DOI Listing |
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