Decoupling spin-orbital correlations in a layered manganite amidst ultrafast hybridized charge-transfer band excitation
(2020) In Physical Review B 101(20).- Abstract
In the mixed-valence manganites, a near-infrared laser typically melts the orbital and spin order simultaneously, corresponding to the photoinduced d1d0→d0d1 excitations in the Mott-Hubbard bands of manganese. Here, we use ultrafast methods-both femtosecond resonant X-ray diffraction and optical reflectivity-to demonstrate that the orbital response in the layered manganite Nd1-xSr1+xMnO4(x=2/3) does not follow this scheme. At the photoexcitation saturation fluence, the orbital order is only diminished by a few percent in the transient state. Instead of the typical d1d0→d0d1 transition, a near-infrared pump in this compound promotes a fundamentally distinct mechanism of charge transfer, the d0→d1L, where... (More)
In the mixed-valence manganites, a near-infrared laser typically melts the orbital and spin order simultaneously, corresponding to the photoinduced d1d0→d0d1 excitations in the Mott-Hubbard bands of manganese. Here, we use ultrafast methods-both femtosecond resonant X-ray diffraction and optical reflectivity-to demonstrate that the orbital response in the layered manganite Nd1-xSr1+xMnO4(x=2/3) does not follow this scheme. At the photoexcitation saturation fluence, the orbital order is only diminished by a few percent in the transient state. Instead of the typical d1d0→d0d1 transition, a near-infrared pump in this compound promotes a fundamentally distinct mechanism of charge transfer, the d0→d1L, where L denotes a hole in the oxygen band. This finding may pave a different avenue for selectively manipulating specific types of order in complex materials of this class.
(Less)
- author
- organization
- publishing date
- 2020-05-15
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review B
- volume
- 101
- issue
- 20
- article number
- 201103
- publisher
- American Physical Society
- external identifiers
-
- scopus:85085843288
- ISSN
- 2469-9950
- DOI
- 10.1103/PhysRevB.101.201103
- language
- English
- LU publication?
- yes
- id
- 0ed3f95b-ab3a-405a-9eca-debf65883033
- date added to LUP
- 2021-01-14 09:51:40
- date last changed
- 2022-04-26 23:34:55
@article{0ed3f95b-ab3a-405a-9eca-debf65883033, abstract = {{<p>In the mixed-valence manganites, a near-infrared laser typically melts the orbital and spin order simultaneously, corresponding to the photoinduced d1d0→d0d1 excitations in the Mott-Hubbard bands of manganese. Here, we use ultrafast methods-both femtosecond resonant X-ray diffraction and optical reflectivity-to demonstrate that the orbital response in the layered manganite Nd<sub>1-x</sub>Sr<sub>1+x</sub>MnO<sub>4</sub>(x=2/3) does not follow this scheme. At the photoexcitation saturation fluence, the orbital order is only diminished by a few percent in the transient state. Instead of the typical d1d0→d0d1 transition, a near-infrared pump in this compound promotes a fundamentally distinct mechanism of charge transfer, the d0→d1L, where L denotes a hole in the oxygen band. This finding may pave a different avenue for selectively manipulating specific types of order in complex materials of this class.</p>}}, author = {{Shen, L. and Mack, S. A. and Dakovski, G. and Coslovich, G. and Krupin, O. and Hoffmann, M. and Huang, S. W. and Chuang, Y. D. and Johnson, J. A. and Lieu, S. and Zohar, S. and Ford, C. and Kozina, M. and Schlotter, W. and Minitti, M. P. and Fujioka, J. and Moore, R. and Lee, W. S. and Hussain, Z. and Tokura, Y. and Littlewood, P. and Turner, J. J.}}, issn = {{2469-9950}}, language = {{eng}}, month = {{05}}, number = {{20}}, publisher = {{American Physical Society}}, series = {{Physical Review B}}, title = {{Decoupling spin-orbital correlations in a layered manganite amidst ultrafast hybridized charge-transfer band excitation}}, url = {{http://dx.doi.org/10.1103/PhysRevB.101.201103}}, doi = {{10.1103/PhysRevB.101.201103}}, volume = {{101}}, year = {{2020}}, }