Published July 2016 | Version v1
Journal article Metadata-only

Ultrafast Jahn-Teller polaron dynamics in a bi-layered manganite single crystal

Creators

  • 1. Department of Physics, Shanghai University, Shanghai (China)
  • 2. Division of Nuclear Materials and Engineering, TMSR Center, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai (China)
  • 3. Institute for Superconducting and Electronic Materials, University of Wollongong, North Wollongong, NSW (Australia)

Description

We report the photoinduced ultrafast quasiparticle recombination dynamics of colossal magnetoresistance single crystal La1.2Sr1.8Mn2O7 by using femtosecond time-resolved reflection spectroscopy in a wide range of temperatures. Here, we find the transient reflectivity change ΔR exhibits a competition process of a fast negative component (∝ sub-picosecond) against a slow positive component (∝ nanosecond), as the sample goes from paramagnetic (PM) to ferromagnetic (FM) state with decreasing the temperature. The very fast initial decay of the photoinduced ΔR corresponds to the photoionization of the Jahn-Teller polaronic response, which is unambiguously sensitive to the coupling between electron and lattice in the PM and FM phases in La1.2Sr1.8Mn2O7 single crystal. (copyright 2016 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Availability note (English)

Available from: http://dx.doi.org/10.1002/pssr.201600143

Additional details

Identifiers

DOI
10.1002/pssr.201600143;

Publishing Information

Journal Title
Physica Status Solidi. Rapid Research Letters (Online)
Journal Volume
10
Journal Issue
7
Journal Page Range
p. 558-562
ISSN
1862-6270
CODEN
PSSRCS

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
47097712
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
FERROMAGNETISM; JAHN-TELLER EFFECT; LANTHANUM OXIDES; MAGNETIZATION; MAGNETORESISTANCE; MANGANESE OXIDES; MONOCRYSTALS; PARAMAGNETISM; PHASE TRANSFORMATIONS; POLARONS; RECOMBINATION; REFLECTIVITY; SPECTRAL REFLECTANCE; STRONTIUM OXIDES; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0000-0013 K; TEMPERATURE RANGE 0013-0065 K; TEMPERATURE RANGE 0065-0273 K; TEMPERATURE RANGE 0273-0400 K; TIME DEPENDENCE
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; CRYSTALS; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; LANTHANUM COMPOUNDS; MAGNETISM; MANGANESE COMPOUNDS; OPTICAL PROPERTIES; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; QUASI PARTICLES; RARE EARTH COMPOUNDS; STRONTIUM COMPOUNDS; SURFACE PROPERTIES; TEMPERATURE RANGE; TRANSITION ELEMENT COMPOUNDS