Photo-modulated dynamic competition between metallic and insulating phases in a layered manganite

Yuelin Li; Donald Walko; Qing'An Li; Yaohua Liu; Stephan Rosenkranz; Hong Zheng; J. F. Mitchell; Haidan Wen; Eric Dufresne; Bernhard Adams

doi:10.1557/opl.2014.23

Photo-modulated dynamic competition between metallic and insulating phases in a layered manganite

Yuelin Li, Donald Walko, Qing'An Li, Yaohua Liu, Stephan Rosenkranz, Hong Zheng, J. F. Mitchell, Haidan Wen, Eric Dufresne, Bernhard Adams

Research output: Contribution to journal › Conference article › peer-review

Abstract

We show evidence that the competition between the antiferromagnetic metallic phase and the charge- and orbital-ordered insulating phase at the reentrant phase boundary of a layered manganite, LaSr₂Mn ₂O₇, can be manipulated using ultrafast optical excitation. The time-dependent evolution of the Jahn-Teller superlattice reflection, the indicator of the formation of charge and orbital order, was measured at different laser fluences. The laser-induced change in the Jahn-Teller reflection intensity shows a reversal of sign between earlier (∼10 ns) and later (∼150 ns) times during the relaxation of the sample. This is consistent with a physics picture whereby the laser excitation modulates the local competition between the metallic and the insulating phases.

Original language	English
Journal	Materials Research Society Symposium Proceedings
Volume	1636
DOIs	https://doi.org/10.1557/opl.2014.23
State	Published - 2014
Externally published	Yes
Event	2013 MRS Fall Meeting - Boston, MA, United States Duration: Dec 1 2013 → Dec 6 2013

Funding

Funders	Funder number
Office of Basic Energy Sciences
Office of Science

Keywords

metal-insulator transition
phase transformation
x-ray diffraction (XRD)

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10.1557/opl.2014.23

Cite this

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title = "Photo-modulated dynamic competition between metallic and insulating phases in a layered manganite",

abstract = "We show evidence that the competition between the antiferromagnetic metallic phase and the charge- and orbital-ordered insulating phase at the reentrant phase boundary of a layered manganite, LaSr2Mn 2O7, can be manipulated using ultrafast optical excitation. The time-dependent evolution of the Jahn-Teller superlattice reflection, the indicator of the formation of charge and orbital order, was measured at different laser fluences. The laser-induced change in the Jahn-Teller reflection intensity shows a reversal of sign between earlier (∼10 ns) and later (∼150 ns) times during the relaxation of the sample. This is consistent with a physics picture whereby the laser excitation modulates the local competition between the metallic and the insulating phases.",

keywords = "metal-insulator transition, phase transformation, x-ray diffraction (XRD)",

author = "Yuelin Li and Donald Walko and Qing'An Li and Yaohua Liu and Stephan Rosenkranz and Hong Zheng and Mitchell, {J. F.} and Haidan Wen and Eric Dufresne and Bernhard Adams",

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doi = "10.1557/opl.2014.23",

language = "English",

volume = "1636",

journal = "Materials Research Society Symposium Proceedings",

issn = "0272-9172",

note = "2013 MRS Fall Meeting ; Conference date: 01-12-2013 Through 06-12-2013",

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TY - JOUR

T1 - Photo-modulated dynamic competition between metallic and insulating phases in a layered manganite

AU - Li, Yuelin

AU - Walko, Donald

AU - Li, Qing'An

AU - Liu, Yaohua

AU - Rosenkranz, Stephan

AU - Zheng, Hong

AU - Mitchell, J. F.

AU - Wen, Haidan

AU - Dufresne, Eric

AU - Adams, Bernhard

PY - 2014

Y1 - 2014

N2 - We show evidence that the competition between the antiferromagnetic metallic phase and the charge- and orbital-ordered insulating phase at the reentrant phase boundary of a layered manganite, LaSr2Mn 2O7, can be manipulated using ultrafast optical excitation. The time-dependent evolution of the Jahn-Teller superlattice reflection, the indicator of the formation of charge and orbital order, was measured at different laser fluences. The laser-induced change in the Jahn-Teller reflection intensity shows a reversal of sign between earlier (∼10 ns) and later (∼150 ns) times during the relaxation of the sample. This is consistent with a physics picture whereby the laser excitation modulates the local competition between the metallic and the insulating phases.

AB - We show evidence that the competition between the antiferromagnetic metallic phase and the charge- and orbital-ordered insulating phase at the reentrant phase boundary of a layered manganite, LaSr2Mn 2O7, can be manipulated using ultrafast optical excitation. The time-dependent evolution of the Jahn-Teller superlattice reflection, the indicator of the formation of charge and orbital order, was measured at different laser fluences. The laser-induced change in the Jahn-Teller reflection intensity shows a reversal of sign between earlier (∼10 ns) and later (∼150 ns) times during the relaxation of the sample. This is consistent with a physics picture whereby the laser excitation modulates the local competition between the metallic and the insulating phases.

KW - metal-insulator transition

KW - phase transformation

KW - x-ray diffraction (XRD)

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U2 - 10.1557/opl.2014.23

DO - 10.1557/opl.2014.23

M3 - Conference article

AN - SCOPUS:84897988789

SN - 0272-9172

VL - 1636

JO - Materials Research Society Symposium Proceedings

JF - Materials Research Society Symposium Proceedings

T2 - 2013 MRS Fall Meeting

Y2 - 1 December 2013 through 6 December 2013

ER -

Photo-modulated dynamic competition between metallic and insulating phases in a layered manganite

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