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Study of Photoexcited States and Nonlinear Optical Responses in Insulating Copper Oxides

Research Project

Project/Area Number 14540320
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 固体物性Ⅱ(磁性・金属・低温)
Research InstitutionTohoku University

Principal Investigator

TOHYAMA Takami  Tohoku University, Institute for Materials Research, Associate Professor, 金属材料研究所, 助教授 (70237056)

Project Period (FY) 2002 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥2,700,000 (Direct Cost: ¥2,700,000)
Fiscal Year 2003: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2002: ¥1,800,000 (Direct Cost: ¥1,800,000)
KeywordsNonlinear optical response / Cuprate Mott insulator / Photoexcited state / Spin-charge separation
Research Abstract

Charge gap in the Mott insulator originates from strong electron correlation. Therefore, we expect optical responses that are different from those in the band insulator. In. this project, we theoretically examine photoexcitaed states and nonlinear optical responses in insulating copper oxides that are typical Mott insulators by using a half filled Hubbard model and its effective model
We investigated the nonlinear optical responses in the two-dimensional Mott insulator, applying the numerically exact diagonalization technique to the effective model. We found that, in contrast to one dimension where spin and charge are separated, the interplay of photo-doped carriers and localized spins in the system plays a crucial role in the nonlinear optical responses. We also found that anomalous incident-photon energy dependence of the two-magonon Raman scattering in two-dimensional insulating cuprates is caused by the presence of the spins. In order to clarify the dependence of photoexcited states on dimensionality, we examined the temperature dependence of the linear optical absorption spectrum. In one-dimensional system, the there is no remarkable temperature dependence at low temperature because of spin-charge separation. In contrast, characteristic temperature dependences are found in two dimensions, which come from the interplay of carriers and spins. Not only the optically allowed but also forbidden states contributes in the nonlinear optical responses. To examine the distribution of both the states, we performed a dynamical density-matrix renormalization group calculation for the. one-dimensional Hubbard model. We found that the degeneracy of the states seen at large Coulomb interaction is lifted in real materials.

Report

(3 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • Research Products

    (24 results)

All Other

All Publications (24 results)

  • [Publications] M.Takahashi, T.Tohyama, S.Maekawa: "Nonlinear optical response in one-dimensional Mott insulators"Journal of Physics and Chemistry of Solids. 63. 1159-1602 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] M.Takahashi, T.Tohyama, S.Maekawa: "Nonlinear optical response in two-dimensional Mott insulators"Physical Review B. 66. 125102(1)-125102(8) (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Tohyama, H.Onodera, K.Tsutsui, S.Maekawa: "Resonant two-magnon Raman scattering and photoexcited states in two-dimensional Mott insulators"Physical Review Letters. 89. 257405(1)-257405(4) (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Onodera, K.Tsutsui, T.Tohyama, S.Maekawa: "Resonant two-magnon Raman scattering in two-dimensional Mott insulator"Physica B. 329-333. 775-776 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] M.Takahashi, T.Tohyama, S.Maekawa: "Nonlinear optical response in two-dimensional Mott insulators"Physica B. 329-333. 918-919 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Onodera, T.Tohyama, S.Maekawa: "Resonant two-magnon Raman scattering in two-dimensional and ladder-type Mott insulator"Physica C. 392-396. 203-206 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Onodera, T.Tohyama, S.Maekawa: "Temperature and dimensionality dependencies of optical absorption spectra in Mott insulators"Physical Review B. 69. 245117(1)-245117(5) (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Matsueda, T.Tohyama, S.Maekawa: "Dynamical density matrix renormalization group study of photoexcited states in one-dimensional Mott insulators"Physical Review B. 70. 033102(1)-033102(4) (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] M.Takahashi, T.Tohyama, S.Maekawa: "Nonlinear optical response in one-dimensional Mott insulators -"Journal of Physics and Chemistry of Solids. 63. 1159-1602 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] M.Takahashi, T.Tohyama, S.Maekawa: "Nonlinear optical response in two-dimensional Mott insulators"Physical Review B. 66. 126102(1)-126102(8) (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Tohyama, H.Onodera, K.Tsutsui, S.Maekawa: "Resonant two-magnon Raman scattering and photo-excited states in two-dimensional Mott insulators"Physical Review Letters. 89. 257405(1)-257405(4) (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Onodera, K.Tsutsui, T.Tohyama, S.Maekawa: "Resonant two-magnon Raman scattering in two-dimensional Mott insulator"Physica B. 329-333. 775-776 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] M.Takahashi, T.Tohyama, S.Maekawa: "Nonlinear optical response in two-dimensional Mott insulator"Physica B. 329-333. 918-919 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Onodera, T.Tohvama, S.Maekawa: "Resonant two-magnon Raman scattering in two-dimensional and ladder-type Mott insulator"Physica C. 392-396. 203-206 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Onodera, T.Tohyama, S.Maekawa: "Temperature and dimensionality dependencies of optical absorption spectra in Mott insulators"Physical Review B. 69. 245117(1)-245117(5) (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Matsueda, T.Tohyama, S.Maekawa: "Dynamical density matrix renormalization group study of photoexcited states in one-dimensional Mott insulators"Physical Review B. 70. 033102(1)-033102(4) (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] M.Takahashi, T.Tohyama, S.Maekawa: "Nonlinear optical response in two-dimensional Mott insulators"Physica B. 329(333). 918-919 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.Onodera, K.Tsutsui, T.Tohyama, S.Maekawa: "Resonant two-magnon Raman scattering in two-dimensional Mott insulator"Physica B. 329(333). 775-776 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.Onodera, T.Tohyama, S.Maekawa: "Resonant two-magnon Raman scattering in two-dimensional and ladder-type Mott insulator"Physica C. 392(396). 203-206 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] M.Takahashi, T.Tohyama, S.Maekawa: "Nonlinear optical response in one-dimensional Mott insulators"Journal of Physics and Chemistry of Solids. 63・6-8. 1159-1602 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] M.Takahashi, T.Tohyama, S.Maekawa: "Nonlinear optical response in two-dimensional Mott insulators"Physical Review B. 66・12. 125102(1)-125102(8) (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Tohyama, H.Onodera, K.Tsutsui, S.Maekawa: "Resonant two-magnon Raman scattering and photoexcited states in two-dimensional Mott insulators"Physical Review Letters. 89・25. 257405(1)-257405(4) (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] M.Takahashi, T.Tohyama, S.Maekawa: "Nonlinear optical response in two-dimensional Mott insulators"Physica B. (未定). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] H.Onodera, K.Tsutsui, T.Tohyama, S.Maekawa: "Resonant two-magnon Raman scattering in two-dimensional Mott"Physica B. (未定). (2003)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2020-05-15  

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