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Title: Direct and real time probe of photoinduced structure transition in colossal magnetoresistive material

Abstract

Here, we report a direct and real time measurement of photoinduced structure phase transition in single crystal La 0.84Sr 0.16MnO 3 using femtosecond electron diffraction. The melting of orthorhombic lattice ordering under femtosecond optical excitation is found involving two distinct processes with different time scales, an initial fast melting of orthorhombic phase in about 4 ps and a subsequent slower transformation in 90 ps and longer timescales. Furthermore, the fast process is designated as the initial melting of orthorhombic phase induced by the Mn-O bond change that is most likely driven by the quenching of the dynamic Jahn-Teller distortion following the photo-excitation. We attribute the slow process to the growing of newly formed structure domain from the photo-excited sites to the neighboring non-excited orthorhombic sites.

Authors:
ORCiD logo [1];  [2];  [3];  [4];  [5];  [4]
  1. Florida State Univ., Tallahassee, FL (United States). Physics Dept.; National High Mangetic Field Lab., Tallahassee, FL (United States); Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
  2. Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics
  3. National High Mangetic Field Lab., Tallahassee, FL (United States)
  4. Florida State Univ., Tallahassee, FL (United States). Physics Dept.; National High Mangetic Field Lab., Tallahassee, FL (United States)
  5. Univ. of Texas, Austin, TX (United States). Texas Materials Inst.
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1336166
Report Number(s):
BNL-112734-2016-JA
Journal ID: ISSN 0003-6951; APPLAB; R&D Project: MA015MACA; KC0201010
Grant/Contract Number:
SC0012704; 1207252
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 109; Journal Issue: 4; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Li, Junjie, Wang, Xuan, Zhou, Haidong, Zhou, Jun, Cheng, J. G., and Cao, Jianming. Direct and real time probe of photoinduced structure transition in colossal magnetoresistive material. United States: N. p., 2016. Web. doi:10.1063/1.4960100.
Li, Junjie, Wang, Xuan, Zhou, Haidong, Zhou, Jun, Cheng, J. G., & Cao, Jianming. Direct and real time probe of photoinduced structure transition in colossal magnetoresistive material. United States. doi:10.1063/1.4960100.
Li, Junjie, Wang, Xuan, Zhou, Haidong, Zhou, Jun, Cheng, J. G., and Cao, Jianming. Fri . "Direct and real time probe of photoinduced structure transition in colossal magnetoresistive material". United States. doi:10.1063/1.4960100. https://www.osti.gov/servlets/purl/1336166.
@article{osti_1336166,
title = {Direct and real time probe of photoinduced structure transition in colossal magnetoresistive material},
author = {Li, Junjie and Wang, Xuan and Zhou, Haidong and Zhou, Jun and Cheng, J. G. and Cao, Jianming},
abstractNote = {Here, we report a direct and real time measurement of photoinduced structure phase transition in single crystal La0.84Sr0.16MnO3 using femtosecond electron diffraction. The melting of orthorhombic lattice ordering under femtosecond optical excitation is found involving two distinct processes with different time scales, an initial fast melting of orthorhombic phase in about 4 ps and a subsequent slower transformation in 90 ps and longer timescales. Furthermore, the fast process is designated as the initial melting of orthorhombic phase induced by the Mn-O bond change that is most likely driven by the quenching of the dynamic Jahn-Teller distortion following the photo-excitation. We attribute the slow process to the growing of newly formed structure domain from the photo-excited sites to the neighboring non-excited orthorhombic sites.},
doi = {10.1063/1.4960100},
journal = {Applied Physics Letters},
number = 4,
volume = 109,
place = {United States},
year = {Fri Jul 29 00:00:00 EDT 2016},
month = {Fri Jul 29 00:00:00 EDT 2016}
}

Journal Article:
Free Publicly Available Full Text
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  • We report a direct and real time measurement of photoinduced structure phase transition in single crystal La{sub 0.84}Sr{sub 0.16}MnO{sub 3} using femtosecond electron diffraction. The melting of orthorhombic lattice ordering under femtosecond optical excitation is found involving two distinct processes with different time scales, an initial fast melting of orthorhombic phase in about 4 ps and a subsequent slower transformation in 90 ps and longer timescales. The fast process is designated as the initial melting of orthorhombic phase induced by the Mn-O bond change that is most likely driven by the quenching of the dynamic Jahn-Teller distortion following the photo-excitation.more » The slow process is attributed to the growing of newly formed structure domain from the photo-excited sites to the neighboring non-excited orthorhombic sites.« less
  • We studied the ultrafast insulator-metal transition in a manganite by means of picosecond X-ray absorption at the O K- and Mn L-edges, probing photoinduced changes in O-2p and Mn-3d electronic states near the Fermi level.
  • The temperature dependence of the electronic and atomic structure of the colossal magnetoresistive oxides La1 xSrxMnO3 (x = 0.3, 0.4) has been studied using core and valence level photoemission, x-ray absorption and emission, and extended x-ray absorption fine structure spectroscopy. A dramatic and reversible change of the electronic structure is observed on crossing the Curie temperature, including charge localization on and spin-moment increase of Mn, together with Jahn-Teller distortions, both signatures of polaron formation. Our data are also consistent with a phase-separation scenario.
  • No abstract prepared.
  • We have observed a distinct surface phase transition for an important class of giant magnetoresistance materials [La{sub 1-x}Sr{sub x}MnO{sub 3}(x=0.35)]. The surface phase transition occurs at 240 K compared to 370 K for the bulk and is fundamentally different. In the bulk, a ferromagnetic metal to paramagnetic bad-metal transition occurs, while the lower-temperature surface transition is from an insulator to a semimetal. The surface of this manganese perovskite is electronically and compositionally quite different from the bulk with important implications for the behavior of artificially grown layered transition-metal oxides and for the use of surface sensitive techniques to probe themore » bulk. (c) 2000 American Institute of Physics.« less