Directly probing spin dynamics in insulating antiferromagnets using ultrashort terahertz pulses
Journal Article
·
· Physical Review B
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Rutgers Univ., Piscataway, NJ (United States)
We investigate spin dynamics in the antiferromagnetic (AFM) multiferroic TbMnO3 using opticalpump, terahertz (THz)-probe spectroscopy. Photoexcitation results in a broadband THz transmission change, with an onset time of 25 ps at 6 K that becomes faster at higher temperatures. We attribute this time constant to spin-lattice thermalization. The excellent agreement between our measurements and previous ultrafast resonant x-ray diffraction measurements on the same material confirms that our THz pulse directly probes spin order. We suggest that this could be the case in general for insulating AFM materials, if the origin of the static absorption in the THz spectral range is magnetic.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC52-06NA25396; FG02-07ER46382
- OSTI ID:
- 1345937
- Alternate ID(s):
- OSTI ID: 1333320
- Report Number(s):
- LA-UR-16-26221; TRN: US1701221
- Journal Information:
- Physical Review B, Vol. 94, Issue 18; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 10 works
Citation information provided by
Web of Science
Web of Science
A tunable time-resolved spontaneous Raman spectroscopy setup for probing ultrafast collective excitation and quasiparticle dynamics in quantum materials
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journal | July 2018 |
Using ultrashort terahertz pulses to directly probe spin dynamics in insulating antiferromagnets
|
journal | April 2018 |
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