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Fabrication of semiconductor nanostructures assuming enhanced magneto-optical effects and control of their magnetism by irradiation of light

Research Project

Project/Area Number 13450004
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied materials science/Crystal engineering
Research InstitutionUniversity of Tsukuba

Principal Investigator

TAKITA Koki  University of Tsukuba, Institute of Materials Science, Professor, 物質工学系, 教授 (00011213)

Co-Investigator(Kenkyū-buntansha) TAKAMASU Tadashi  National Institute of Materials Science, Chief Researcher, ナノテクノロジー研究所, 主任研究官 (60212015)
OZAKI Nobuhiko  University of Tsukuba, Institute of Materials Science, Research Associate, 物質工学系, 助手 (30344873)
黒田 眞司  筑波大学, 物質工学系, 講師 (40221949)
Project Period (FY) 2001 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥13,100,000 (Direct Cost: ¥13,100,000)
Fiscal Year 2003: ¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 2002: ¥4,000,000 (Direct Cost: ¥4,000,000)
Fiscal Year 2001: ¥6,700,000 (Direct Cost: ¥6,700,000)
Keywordsself-organized dots / lattice mismatch / diluted magnetic semiconductors / photoluminescence / zero-dimensional exciton / 希薄性半導体 / 2次元電子系 / 量子ドット / スピントロニクス / 磁気発光特性 / 磁気輸送特性 / マイグレーション
Research Abstract

We have fabricated self-organized dots of CdTe and Cd1-xMnxTe on ZnTe(001) surface by molecular beam epitaxy (MBE). In the present research project, we have performed the following two topics. (1) change the confinement energy of electrons and holes due to the barrier layer by growing the dots on the mixed crystal (band-gap engineering) (2) make the structure in which the dot layer and the barrier layer are grown repeatedly (dot superlattice), as the details are described in the following.
(1) Band-gap engineering by changing the barrier layer
We have grown self-organized dots of CdTe on the mixed crystals of (Zn, Mg)Te, in place of ZnTe. In the photoluminescence measurement, it was found that the temperature dependence of the luminescence intensity was improved significantly, with the suppression of the thermal quenching of the luminescence, compared to the dots on ZnTe. This is considered to be caused by the enhancement of the confinement of electron-hole pairs due to the increase of t … More he band-gap energy of the barrier layer. In addition, we grew (Cd, Mn)Te dots on (An, Mg)Te layer in the similar method. In the magneto-PL measurement, we observed the red-shift of the exicitonic emission energy due to the gigantic Zeeman splitting, the amount of this red-shift was found to be consistent with the calculation.
(2) Dot superlattice
We have fabricated the superlattice structure in which the Cd(Mn)Te dot layer and ZnTe barrier layer were stacked with several tens of cycles. In the PL measurement, we observed two emission lines, differently from the sample with the dot single layer. It is considered that the higher-energy line originated from the isolated level of the individual dots and the lower-energy line originated from the correlated level between the dots in the neighboring dot layers. This assignment was confirmed from the results of the PL measurement on a series of sample wiath different thickness of the barrier layers, in which the emission energy of the lower-energy line was shifted systematically with the barrier thickness. Less

Report

(4 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • Research Products

    (38 results)

All 2004 2003 2002 Other

All Journal Article (22 results) Publications (16 results)

  • [Journal Article] Epitaxial growth of II-VI semiconductor CdTe on a layered material NbSe_22004

    • Author(s)
      S.Kuroda et al.
    • Journal Title

      Journal of Crystal Growth 262

      Pages: 383-387

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Dynamics of localized Mn spins in diluted-magnetic-semiconductor nanostructures with quantum dots2004

    • Author(s)
      A.V.Scherbakov et al.
    • Journal Title

      Physica Status Solidi(b) 241

      Pages: 361-369

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Magnetotransport and magnetic properties of p-Zn_<1-x>Mn_xTe : N --carrier-induced ferromagnetism2004

    • Author(s)
      K.-T.Nam et al.
    • Journal Title

      Physica Status Solidi(b) 241

      Pages: 668-671

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Magnetic properties of MBE-grown Zn_<1-x>Cr_xTe2004

    • Author(s)
      N.Ozaki et al.
    • Journal Title

      Physica Status Solidi(c) 1

      Pages: 957-960

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Excitons diffusion in (Cd,Mn)Te-based two-dimensional electron system under magnetic fields2004

    • Author(s)
      F.Takano et al.
    • Journal Title

      Physica E 22

      Pages: 615-619

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] MBE growth and optical properties of self-organized dots of CdTe and (Cd,Mn)Te2004

    • Author(s)
      S.Kuroda et al.
    • Journal Title

      Journal of Alloys and Compounds 371

      Pages: 31-36

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Epitaxial growth of II-VI semiconductor CdTe on a layered material NbSe_22004

    • Author(s)
      S.Kuroda, K.Minami, K.Takita
    • Journal Title

      Journal of Crystal Growth 262

      Pages: 383-387

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Dynamics of localized Mn spins in diluted-magnetic semiconductor nanostructures with quantum dots2004

    • Author(s)
      A.V.Scherbakov, A.V.Akimov, D.R.Yakovlev, W.Ossau, L.W.Molenkamp, Y.Terai, S.Kuroda, K.Takita, I.Souma, Y.Oka
    • Journal Title

      Physica Status Solidi(b) 241

      Pages: 361-369

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Magnetotransport and magnetic properties of p-Zn_<1-x>Mn_xTe : N - carrier induced ferromagnetism2004

    • Author(s)
      K.-T.Nam, S.Kuroda, T.Kumekawa, N.Ozaki, K.Takita
    • Journal Title

      Physica Status Solidi(b) 241

      Pages: 668-671

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Magnetic properties of MBE-grown Zn_<1-x>Cr_xTe2004

    • Author(s)
      N.Ozaki, N.Nishizawa, K.-T.Nam, S.Kuroda, K.Takita
    • Journal Title

      Physica Status Solidi(c) 1

      Pages: 957-960

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Excitons diffusion in (Cd, Mn)Te-basaed two-dimensional electron system under magnetic fields2004

    • Author(s)
      F.Takano, T.Tokizaki, H.Akinaga, S.Kuroda, K.Takita
    • Journal Title

      Physica E22

      Pages: 615-619

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] MBE growth and optical properties of self-organized dots of CdTe and (Cd, Mn)Te2004

    • Author(s)
      S.Kuroda, N.Itoh, Y.Terai, K.Takita, T.Okuno, M.Nomura, Y.Masumoto
    • Journal Title

      Journal of Alloys and Compounds 371

      Pages: 31-36

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Highest-order optical phonon-mediated relaxation in CdTe/ZnTe quantum dots2003

    • Author(s)
      Y.Masumoto et al.
    • Journal Title

      Journal of Luminescence 102-103

      Pages: 623-628

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Spin-lattice relaxation of Mn ions in nanostructures with semimagnetic quantum dots2003

    • Author(s)
      A.V.Akimov et al.
    • Journal Title

      Journal of Superconductivity : Incorporating Novel Magnetism 16

      Pages: 391-394

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Magneto-transport properties of p-type Zn_<1-x>Mn_xTe : N grown by MBE2003

    • Author(s)
      K.-T.Nam et al.
    • Journal Title

      Journal of Superconductivity : Incorporating Novel Magnetism 16

      Pages: 335-338

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Spatial diffusion of excitons in n-type modulation-doped (Cd,Mn)Te/(Cd,Mg)Te single quantum wells under magnetic fields2003

    • Author(s)
      E.Takano et al.
    • Journal Title

      Applied Physics Letters 83

      Pages: 2853-2855

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Highest-order optical phonon-mediated relaxation in CdTe/ZnTe quantum dots2003

    • Author(s)
      Y.Masumoto, M.Nomura, T.Okuno, Y.Terai, S.Kuroda, K.Takita
    • Journal Title

      Journal of Luminescence 102-103

      Pages: 623-628

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Spin-lattice relaxation of Mn irons in nanostructures with semimagnetic quantum dots2003

    • Author(s)
      A.V.Akimov, A.V.Scherbakov, D.R.Yakovlev, W.Ossau, L.W.Molenkamp, Y.Oka, I.Souma, Y.Terai, S.Kuroda, K.Takita
    • Journal Title

      Journal of Superconductivity : Incorporating Novel Magnetism 16

      Pages: 391-394

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Magneto-transport properties of p-type Zn_<1-x>Mn_xTe : N grown by MBE2003

    • Author(s)
      K.-T.Nam, N.Watanabe, S.Kuroda, K.Takita
    • Journal Title

      Journal of Superconductivity : Incorporating Novel Magnetism 16

      Pages: 335-338

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Spatial diffusion of excitons in n-type modulation-doped (Cd, Mn)Te/(Cd, Mg)Te single quantum wells under magnetic fields2003

    • Author(s)
      F.Takano, H.Akinaga, T.Tokizaki, S.Kuroda, K.Takita
    • Journal Title

      Applied physics Letters 83

      Pages: 2853-2855

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Optical study of phonon-mediated carrier relaxation in CdTe/ZnTe self-assembled quantum dots2002

    • Author(s)
      T.Okuno et al.
    • Journal Title

      Journal of the Physical Society of Japan 70

      Pages: 3052-3058

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Optical study of phonon-mediated carrier relaxation in CdTe/ZnTe self-assembled quantum dots2002

    • Author(s)
      T.Okuno, M.Nomura, Y.Masumoto, Y.Terai, S.Kuroda, K.Takita
    • Journal Title

      Journal of the Physical Society of Japan 71

      Pages: 3052-3058

    • NAID

      110001954188

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Y.Masumoto et al.: "Highest-order optical phonon-mediated relaxation in CdTe/ZnTe quantum dots"Journal of Luminescence. 102-103. 623-628 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] A.V.Akimov: "Spin-lattice relaxation of Mn ions in nanostructures with semimagnetic quantum dots"Journal of Superconductivity : Incorporating Novel Magnetism. 16. 391-394 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] K.-T.Nam et al.: "Magneto-transport properties of p-type Zn_<1-x>Mn_xTe : N grown by MBE"Journal of Superconductivity : Incorporating Novel Magnetism. 16. 335-338 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] F.Takano et al.: "Spatial diffusion of excitons in n-type modulation-doped (Cd, Mn)Te/(Cd, Mg)Te single quantum wells under magnetic fields"Applied Physics Letters. 83. 2853-2855 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] K.-T.Nam et al.: "Magnetotransport and Magnetic Properties of p-Zn_<1-x>Mn_xTe : N-Carrier-Induced Ferromagnetism"Physica Status Solidi(c). (in press).

    • Related Report
      2003 Annual Research Report
  • [Publications] S.Kuroda et al.: "MBE growth and optical properties of self-organized dots of CdTe and (Cd, Mn)Te"Journal of Alloys and Compounds. (in press).

    • Related Report
      2003 Annual Research Report
  • [Publications] Y.H Matsuda et al.: "Effective mass of conduction electrons in Cd_<1-x>Mn_xTe"Phys.Rev.B. 65. 115202 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] K.-T.Nam et al.: "Conductivity control in nitrogen-doped p-Zn_<1-x>Mn_xTe and magneto-transport properties"Physica Status Solidi (b). 229. 261 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] K.-T Nam et al.: "Magneto-transport properties of p-Zn_<1-x>Mn_xTe by nitrogen doping"Journal of Superconductivity(to be published). (印刷中). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] F.Takano et al.: "Magneto-photoluminescence spectra around ν=1 in magnetic two-dimensional electron gas"Proc.of 15^<th> International Conference on High Magnetic Fields in Semiconductor Physics. (in press). (印刷中).

    • Related Report
      2002 Annual Research Report
  • [Publications] F.Takano et al.: "Anomalous behaviors of magneto-photoluminescence in n-type modulation-doped Cd_<1-x>Mn_xTe/Cd<1-y>Mg_yTe single quantum wells"Proc.of 26^<th> International Conference on the Physics of Semiconductors. (in press). (印刷中).

    • Related Report
      2002 Annual Research Report
  • [Publications] S. Kuroda et al.: "Self-organized quantum dots of Cd_<1-x>Mn_xTe : MBE growth on Zn(Cd)Te surface and magneto-photoluminescence"Physica E. 10. 353-357 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] F. Takano et al.: "Mangneto-transport of two-dimensional electron system in magnetic semiconductors heterostructure Cd(Mn)Te/(Cd,Mg)Te"Physica B. 298. 407-410 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] F. Takano et al.: "Magnetoresistance of two-dimensional electrons in modulation-doped Cd_<1-x>Mn_xTe/Cd_<1-y>Mg_yTe SQWs : the variation with carrier concentration"Physica E. (in press).

    • Related Report
      2001 Annual Research Report
  • [Publications] K. T. Nam et al.: "Conductivity control in nitrogen-doped p-Zn_<1-x>Mn_xTe and magneto-transport properties"Physica Status Solidi. 229. 261-264 (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] F. Takano et al.: "Magneto-photoluminescence and transport measurements on modulation-doped Cd_<1-x>Mn_xTe/Cd_<1-y>Mg_yTe single quantum wells"Physica Status Solidi. 229. 751-755 (2002)

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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