Fingerprints of hot-phonon physics in time-resolved correlated quantum lattice dynamics
The time dynamics of the energy flow from electronic to lattice degrees of freedom in pump-probe setups could be strongly affected by the presence of a hot-phonon bottleneck, which can sustain longer coherence of the optically excited electronic states. Recently, hot-phonon physics has been exper...
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| Format: | Article |
| Language: | English |
| Published: |
SciPost
2022-05-01
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| Series: | SciPost Physics |
| Online Access: | https://scipost.org/SciPostPhys.12.5.173 |
| _version_ | 1818211094291808256 |
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| author | Emmanuele Cappelluti, Dino Novko |
| author_facet | Emmanuele Cappelluti, Dino Novko |
| author_sort | Emmanuele Cappelluti, Dino Novko |
| collection | DOAJ |
| description | The time dynamics of the energy flow from electronic to lattice degrees of
freedom in pump-probe setups could be strongly affected by the presence of a
hot-phonon bottleneck, which can sustain longer coherence of the optically
excited electronic states. Recently, hot-phonon physics has been experimentally
observed and theoretically described in MgB$_2$, the electron-phonon based
superconductor with $T_{\rm c}\approx 39$ K. By employing a combined ab-initio
and quantum-field-theory approach and by taking MgB$_2$ as an example, here we
propose a novel path for revealing the presence and characterizing the
properties of hot phonons through a direct analysis of the information encoded
in the lattice inter-atomic correlations. Such method exploits the underlying
symmetry of the $E_{2g}$ hot modes characterized by a out-of-phase in-plane
motion of the two boron atoms. Since hot phonons occur typically at
high-symmetry points of the Brillouin zone, with specific symmetries of the
lattice displacements, the present analysis is quite general and it could aid
in revealing the hot-phonon physics in other promising materials, such as
graphene, boron nitride, or black phosphorus. |
| first_indexed | 2024-12-12T05:27:02Z |
| format | Article |
| id | doaj.art-cb8f81e5f73442c0af4e0a07a085e778 |
| institution | Directory Open Access Journal |
| issn | 2542-4653 |
| language | English |
| last_indexed | 2024-12-12T05:27:02Z |
| publishDate | 2022-05-01 |
| publisher | SciPost |
| record_format | Article |
| series | SciPost Physics |
| spelling | doaj.art-cb8f81e5f73442c0af4e0a07a085e7782022-12-22T00:36:26ZengSciPostSciPost Physics2542-46532022-05-0112517310.21468/SciPostPhys.12.5.173Fingerprints of hot-phonon physics in time-resolved correlated quantum lattice dynamicsEmmanuele Cappelluti, Dino NovkoThe time dynamics of the energy flow from electronic to lattice degrees of freedom in pump-probe setups could be strongly affected by the presence of a hot-phonon bottleneck, which can sustain longer coherence of the optically excited electronic states. Recently, hot-phonon physics has been experimentally observed and theoretically described in MgB$_2$, the electron-phonon based superconductor with $T_{\rm c}\approx 39$ K. By employing a combined ab-initio and quantum-field-theory approach and by taking MgB$_2$ as an example, here we propose a novel path for revealing the presence and characterizing the properties of hot phonons through a direct analysis of the information encoded in the lattice inter-atomic correlations. Such method exploits the underlying symmetry of the $E_{2g}$ hot modes characterized by a out-of-phase in-plane motion of the two boron atoms. Since hot phonons occur typically at high-symmetry points of the Brillouin zone, with specific symmetries of the lattice displacements, the present analysis is quite general and it could aid in revealing the hot-phonon physics in other promising materials, such as graphene, boron nitride, or black phosphorus.https://scipost.org/SciPostPhys.12.5.173 |
| spellingShingle | Emmanuele Cappelluti, Dino Novko Fingerprints of hot-phonon physics in time-resolved correlated quantum lattice dynamics SciPost Physics |
| title | Fingerprints of hot-phonon physics in time-resolved correlated quantum lattice dynamics |
| title_full | Fingerprints of hot-phonon physics in time-resolved correlated quantum lattice dynamics |
| title_fullStr | Fingerprints of hot-phonon physics in time-resolved correlated quantum lattice dynamics |
| title_full_unstemmed | Fingerprints of hot-phonon physics in time-resolved correlated quantum lattice dynamics |
| title_short | Fingerprints of hot-phonon physics in time-resolved correlated quantum lattice dynamics |
| title_sort | fingerprints of hot phonon physics in time resolved correlated quantum lattice dynamics |
| url | https://scipost.org/SciPostPhys.12.5.173 |
| work_keys_str_mv | AT emmanuelecappellutidinonovko fingerprintsofhotphononphysicsintimeresolvedcorrelatedquantumlatticedynamics |