Centers and Institutes
Published May 12, 2020 | Version v1
Journal article Open

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

Creators

  • 1. Stanford University
  • 2. SLAC National Accelerator Laboratory
  • 3. Lawrence Berkeley National Laboratory
  • 4. Paul Scherrer Institut
  • 5. University of Tokyo
  • 6. University of Chicago

Description

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.

Files

PhysRevB.101.201103.pdf

Files (1.3 MB)

Name Size Download all
md5:b4d79c213bc954da2efc187111f1f1e8
1.3 MB Preview Download

Additional details

Identifiers

DOI
10.1103/PhysRevB.101.201103
Other
oai:uchicago.tind.io:11598

Funding

U. S. Department of Energy
DE-AC02-76SF00515
U. S. Department of Energy
DE-AC02-05CH11231

UChicago Information

Division(s)
Physical Sciences Division
Department(s)
Physics
Center(s) or Institute(s)
James Franck Institute