Orbital fluctuating state in ferromagnetic insulating LaMn O3+δ (0.085≤δ≤0.125) studied using Raman spectroscopy

K. Y. Choi; Yu G. Pashkevich; V. P. Gnezdilov; G. Güntherodt; A. V. Yeremenko; D. A. Nabok; V. I. Kamenev; S. N. Barilo; S. V. Shiryaev; A. G. Soldatov; P. Lemmens

doi:10.1103/PhysRevB.74.064406

Orbital fluctuating state in ferromagnetic insulating LaMn O3+δ (0.085≤δ≤0.125) studied using Raman spectroscopy

K. Y. Choi
, Yu G. Pashkevich
, V. P. Gnezdilov
, G. Güntherodt
, A. V. Yeremenko
, D. A. Nabok
, V. I. Kamenev
, S. N. Barilo
, S. V. Shiryaev
, A. G. Soldatov
, P. Lemmens

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

A giant softening by 30 cm-1 of the 490 and 620 cm-1 Jahn-Teller and breathing optical phonon modes is observed in Raman spectroscopy below the Curie temperature of single crystalline LaMn O3+δ (0.085≤δ≤0.125). A pseudogaplike suppression of a continuum and a Fano antiresonance at 144 cm-1 appear below the charge-ordering temperature. Upon going through the antiferromagnetic/ferromagnetic insulating phase boundary a high-frequency maximum of three-peaks structure evolves to a unstructured, broadened maximum while undergoing a softening in the peak energy. This is interpreted in terms of the presence of fluctuating orbitals and mobile holes which form a stripelike state in the lightly doped, insulating manganites.

Original language	English
Article number	064406
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	74
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevB.74.064406
State	Published - 2006
Externally published	Yes

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Choi, K. Y., Pashkevich, Y. G., Gnezdilov, V. P., Güntherodt, G., Yeremenko, A. V., Nabok, D. A., Kamenev, V. I., Barilo, S. N., Shiryaev, S. V., Soldatov, A. G., & Lemmens, P. (2006). Orbital fluctuating state in ferromagnetic insulating LaMn O3+δ (0.085≤δ≤0.125) studied using Raman spectroscopy. Physical Review B - Condensed Matter and Materials Physics, 74(6), Article 064406. https://doi.org/10.1103/PhysRevB.74.064406

@article{2a8993cea4c648be92348ebcc44f6cfa,

title = "Orbital fluctuating state in ferromagnetic insulating LaMn O3+δ (0.085≤δ≤0.125) studied using Raman spectroscopy",

abstract = "A giant softening by 30 cm-1 of the 490 and 620 cm-1 Jahn-Teller and breathing optical phonon modes is observed in Raman spectroscopy below the Curie temperature of single crystalline LaMn O3+δ (0.085≤δ≤0.125). A pseudogaplike suppression of a continuum and a Fano antiresonance at 144 cm-1 appear below the charge-ordering temperature. Upon going through the antiferromagnetic/ferromagnetic insulating phase boundary a high-frequency maximum of three-peaks structure evolves to a unstructured, broadened maximum while undergoing a softening in the peak energy. This is interpreted in terms of the presence of fluctuating orbitals and mobile holes which form a stripelike state in the lightly doped, insulating manganites.",

author = "Choi, \{K. Y.\} and Pashkevich, \{Yu G.\} and Gnezdilov, \{V. P.\} and G. G{\"u}ntherodt and Yeremenko, \{A. V.\} and Nabok, \{D. A.\} and Kamenev, \{V. I.\} and Barilo, \{S. N.\} and Shiryaev, \{S. V.\} and Soldatov, \{A. G.\} and P. Lemmens",

year = "2006",

doi = "10.1103/PhysRevB.74.064406",

language = "English",

volume = "74",

journal = "Physical Review B - Condensed Matter and Materials Physics",

issn = "1098-0121",

publisher = "American Physical Society",

number = "6",

}

Choi, KY, Pashkevich, YG, Gnezdilov, VP, Güntherodt, G, Yeremenko, AV, Nabok, DA, Kamenev, VI, Barilo, SN, Shiryaev, SV, Soldatov, AG & Lemmens, P 2006, 'Orbital fluctuating state in ferromagnetic insulating LaMn O3+δ (0.085≤δ≤0.125) studied using Raman spectroscopy', Physical Review B - Condensed Matter and Materials Physics, vol. 74, no. 6, 064406. https://doi.org/10.1103/PhysRevB.74.064406

TY - JOUR

T1 - Orbital fluctuating state in ferromagnetic insulating LaMn O3+δ (0.085≤δ≤0.125) studied using Raman spectroscopy

AU - Choi, K. Y.

AU - Pashkevich, Yu G.

AU - Gnezdilov, V. P.

AU - Güntherodt, G.

AU - Yeremenko, A. V.

AU - Nabok, D. A.

AU - Kamenev, V. I.

AU - Barilo, S. N.

AU - Shiryaev, S. V.

AU - Soldatov, A. G.

AU - Lemmens, P.

PY - 2006

Y1 - 2006

N2 - A giant softening by 30 cm-1 of the 490 and 620 cm-1 Jahn-Teller and breathing optical phonon modes is observed in Raman spectroscopy below the Curie temperature of single crystalline LaMn O3+δ (0.085≤δ≤0.125). A pseudogaplike suppression of a continuum and a Fano antiresonance at 144 cm-1 appear below the charge-ordering temperature. Upon going through the antiferromagnetic/ferromagnetic insulating phase boundary a high-frequency maximum of three-peaks structure evolves to a unstructured, broadened maximum while undergoing a softening in the peak energy. This is interpreted in terms of the presence of fluctuating orbitals and mobile holes which form a stripelike state in the lightly doped, insulating manganites.

AB - A giant softening by 30 cm-1 of the 490 and 620 cm-1 Jahn-Teller and breathing optical phonon modes is observed in Raman spectroscopy below the Curie temperature of single crystalline LaMn O3+δ (0.085≤δ≤0.125). A pseudogaplike suppression of a continuum and a Fano antiresonance at 144 cm-1 appear below the charge-ordering temperature. Upon going through the antiferromagnetic/ferromagnetic insulating phase boundary a high-frequency maximum of three-peaks structure evolves to a unstructured, broadened maximum while undergoing a softening in the peak energy. This is interpreted in terms of the presence of fluctuating orbitals and mobile holes which form a stripelike state in the lightly doped, insulating manganites.

UR - https://www.scopus.com/pages/publications/33747117307

U2 - 10.1103/PhysRevB.74.064406

DO - 10.1103/PhysRevB.74.064406

M3 - Article

AN - SCOPUS:33747117307

SN - 1098-0121

VL - 74

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 6

M1 - 064406

ER -

Orbital fluctuating state in ferromagnetic insulating LaMn O3+δ (0.085≤δ≤0.125) studied using Raman spectroscopy

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