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Decoupling spin-orbital correlations in a layered manganite amidst ultrafast hybridized charge-transfer band excitation

Shen, L. ; Mack, S. A. ; Dakovski, G. ; Coslovich, G. ; Krupin, O. ; Hoffmann, M. ; Huang, S. W. LU ; Chuang, Y. D. ; Johnson, J. A. LU and Lieu, S. , et al. (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.

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organization
publishing date
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}},
}