Femtosecond control of phonon dynamics near a magnetic order critical point
Journal Article
·
· Nature Communications
- Cornell Univ., Ithaca, NY (United States). Materials Science and Engineering Dept.
- Italian Inst. of Technology (IIT), Genova (Italy). Central Research Labs.; Scuola Normale Superiore, Pisa (Italy)
- Univ. of California, San Diego, CA (United States). Dept. of Physics; Univ. of California, San Diego, CA (United States). Center for Memory and Recording Research
- Univ. of California, San Diego, CA (United States). Dept. of Physics
- SLAC National Accelerator Lab., Menlo Park, CA (United States). Linac Coherent Light Source (LCLS)
- Univ. of California, San Diego, CA (United States). Center for Memory and Recording Research; National Institute of Technology, Tadepalligudem, Andhra Pradesh, (India). Dept. of Physics
- Univ. of California, San Diego, CA (United States). Center for Memory and Recording Research
- Italian Inst. of Technology (IIT), Genova (Italy). Central Research Labs.
The spin-phonon interaction in spin density wave (SDW) systems often determines the free energy landscape that drives the evolution of the system. When a passing energy flux, such as photoexcitation, drives a crystalline system far from equilibrium, the resulting lattice displacement generates transient vibrational states. Manipulating intermediate vibrational states in the vicinity of the critical point, where the SDW order parameter changes dramatically, would then allow dynamical control over functional properties. Here we combine double photoexcitation with an X-ray free-electron laser (XFEL) probe to control and detect the lifetime and magnitude of the intermediate vibrational state near the critical point of the SDW in chromium. We apply Landau theory to identify the mechanism of control as a repeated partial quench and sub picosecond recovery of the SDW. Our results showcase the capabilities to influence and monitor quantum states by combining multiple optical photoexcitations with an XFEL probe. They open new avenues for manipulating and researching the behaviour of photoexcited states in charge and spin order systems near the critical point.
- Research Organization:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-76SF00515; SC0001805; SC0018237; SC0019414
- OSTI ID:
- 1812544
- Journal Information:
- Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 12; ISSN 2041-1723
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Critical slowing of the spin and charge density wave order in thin film Cr following photoexcitation
Journal Article
·
Wed Jun 05 20:00:00 EDT 2024
· APL Materials
·
OSTI ID:2396736