In situ angle-resolved photoemission study of half-metallic La0.6 Sr0.4 MnO3 thin films

A. Chikamatsu; H. Wadati; H. Kumigashira; M. Oshima; A. Fujimori; N. Hamada; T. Ohnishi; M. Lippmaa; K. Ono; M. Kawasaki; H. Koinuma

doi:10.1016/j.jmmm.2006.10.226

In situ angle-resolved photoemission study of half-metallic La_0.6 Sr_0.4 MnO₃ thin films

A. Chikamatsu, H. Wadati, H. Kumigashira, M. Oshima, A. Fujimori, N. Hamada, T. Ohnishi, M. Lippmaa, K. Ono, M. Kawasaki, H. Koinuma

IMRAM - Division of Inorganic Material Research

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

Abstract

We have performed an in situ angle-resolved photoemission spectroscopy (ARPES) on single-crystal surfaces of La_0.6 Sr_0.4 MnO₃ (LSMO) thin films to investigate the electronic structure near the Fermi level (E_F). ARPES spectra near E_F reveal the existence of a dispersive Mn-3d derived conduction band indicative of an electron pocket centered at the Γ point. Comparing the experimental band structure with the local density approximation + U band-structure calculation, the estimated size of the Fermi surface is consistent with the prediction of the calculation, while the measured bandwidth is significantly narrower than the calculation. The discrepancy between the two suggests that the renormalization effect is significant due to the strong electron correlation in LSMO.

Original language	English
Pages (from-to)	1030-1032
Number of pages	3
Journal	Journal of Magnetism and Magnetic Materials
Volume	310
Issue number	2 SUPPL. PART 2
DOIs	https://doi.org/10.1016/j.jmmm.2006.10.226
Publication status	Published - 2007 Mar

Keywords

Angle-resolved photoemission spectroscopy
Band structure
La Sr MnO thin film
Laser MBE

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10.1016/j.jmmm.2006.10.226

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@article{bb7206483c3144bd92125c6db7717d84,

title = "In situ angle-resolved photoemission study of half-metallic La0.6 Sr0.4 MnO3 thin films",

abstract = "We have performed an in situ angle-resolved photoemission spectroscopy (ARPES) on single-crystal surfaces of La0.6 Sr0.4 MnO3 (LSMO) thin films to investigate the electronic structure near the Fermi level (EF). ARPES spectra near EF reveal the existence of a dispersive Mn-3d derived conduction band indicative of an electron pocket centered at the Γ point. Comparing the experimental band structure with the local density approximation + U band-structure calculation, the estimated size of the Fermi surface is consistent with the prediction of the calculation, while the measured bandwidth is significantly narrower than the calculation. The discrepancy between the two suggests that the renormalization effect is significant due to the strong electron correlation in LSMO.",

keywords = "Angle-resolved photoemission spectroscopy, Band structure, La Sr MnO thin film, Laser MBE",

author = "A. Chikamatsu and H. Wadati and H. Kumigashira and M. Oshima and A. Fujimori and N. Hamada and T. Ohnishi and M. Lippmaa and K. Ono and M. Kawasaki and H. Koinuma",

note = "Funding Information: This work was supported by Grants-in-Aid for Scientific Research (S17101004 and A16204024) from JSPS.",

year = "2007",

month = mar,

doi = "10.1016/j.jmmm.2006.10.226",

language = "English",

volume = "310",

pages = "1030--1032",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier",

number = "2 SUPPL. PART 2",

}

TY - JOUR

T1 - In situ angle-resolved photoemission study of half-metallic La0.6 Sr0.4 MnO3 thin films

AU - Chikamatsu, A.

AU - Wadati, H.

AU - Kumigashira, H.

AU - Oshima, M.

AU - Fujimori, A.

AU - Hamada, N.

AU - Ohnishi, T.

AU - Lippmaa, M.

AU - Ono, K.

AU - Kawasaki, M.

AU - Koinuma, H.

N1 - Funding Information: This work was supported by Grants-in-Aid for Scientific Research (S17101004 and A16204024) from JSPS.

PY - 2007/3

Y1 - 2007/3

N2 - We have performed an in situ angle-resolved photoemission spectroscopy (ARPES) on single-crystal surfaces of La0.6 Sr0.4 MnO3 (LSMO) thin films to investigate the electronic structure near the Fermi level (EF). ARPES spectra near EF reveal the existence of a dispersive Mn-3d derived conduction band indicative of an electron pocket centered at the Γ point. Comparing the experimental band structure with the local density approximation + U band-structure calculation, the estimated size of the Fermi surface is consistent with the prediction of the calculation, while the measured bandwidth is significantly narrower than the calculation. The discrepancy between the two suggests that the renormalization effect is significant due to the strong electron correlation in LSMO.

AB - We have performed an in situ angle-resolved photoemission spectroscopy (ARPES) on single-crystal surfaces of La0.6 Sr0.4 MnO3 (LSMO) thin films to investigate the electronic structure near the Fermi level (EF). ARPES spectra near EF reveal the existence of a dispersive Mn-3d derived conduction band indicative of an electron pocket centered at the Γ point. Comparing the experimental band structure with the local density approximation + U band-structure calculation, the estimated size of the Fermi surface is consistent with the prediction of the calculation, while the measured bandwidth is significantly narrower than the calculation. The discrepancy between the two suggests that the renormalization effect is significant due to the strong electron correlation in LSMO.

KW - Angle-resolved photoemission spectroscopy

KW - Band structure

KW - La Sr MnO thin film

KW - Laser MBE

UR - http://www.scopus.com/inward/record.url?scp=33847255077&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33847255077&partnerID=8YFLogxK

U2 - 10.1016/j.jmmm.2006.10.226

DO - 10.1016/j.jmmm.2006.10.226

M3 - Article

AN - SCOPUS:33847255077

SN - 0304-8853

VL - 310

SP - 1030

EP - 1032

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 2 SUPPL. PART 2

ER -

In situ angle-resolved photoemission study of half-metallic La_0.6 Sr_0.4 MnO₃ thin films

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Keywords

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