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Controlled fabrication of quantum dots and nanostructures by controlling high-index surfaces of group IV semiconductors

Research Project

Project/Area Number 15310081
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Nanomaterials/Nanobioscience
Research InstitutionTohoku University

Principal Investigator

FUJIKAWA Yasunori  Tohoku University, Institute for Materials Research, Associate Professor, 金属材料研究所, 助教授 (70312642)

Co-Investigator(Kenkyū-buntansha) SAKURAI Toshio  Tohoku University, Institute for Materials Research, Professor, 金属材料研究所, 教授 (20143539)
NAGAO Tadaaki  Tohoku University, Institute for Materials Research, Associate Professor, 金属材料研究所, 助教授 (40267456)
SADOWSKI Jerzy Tomaz  Tohoku University, Institute for Materials Research, Research Associate, 金属材料研究所, 助手 (40333885)
TAKAMURA Yukiko (YAMADA Yukiko)  Tohoku University, Institute for Materials Research, Research Associate, 金属材料研究所, 助手 (90344720)
Project Period (FY) 2003 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥16,200,000 (Direct Cost: ¥16,200,000)
Fiscal Year 2004: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 2003: ¥14,600,000 (Direct Cost: ¥14,600,000)
KeywordsScanning tunneling microscopy(STM) / Atomic force microscopy(AFM) / Group IV semiconductor / High-index surface
Research Abstract

Controlling the size and shape of Ge quantum dots formed on the Si(001) substrate is great technological importance for their application. Surfactant effects on this system are regarded as one of promising methods to achieve the controlled growth of quantum dots. Among them, hydrogen-adsorption effect, which has been studied intensively these days, is known to suppress the formation of the "hut" structure formed upon four Ge{105} facets. We have investigated the structure of the Ge(105) surface formed on a Si(105) substrate using STM and AFM to establish the surface structure. The strained structure model for this surface, which we have proposed based on comparison between experimental and theoretical STM images, is confirmed by an atomically resolved AFM image. Hydrogen adsorption on this system has been studied using STM, to show the role of surface strain on the stability of the Ge(105) under hydrogen-adsorption condition. The STM images of the Ge(105) surfaces with adsorbed hydrogen atoms are understood based on the newly-established atomic structure of Ge(105). We observed the stability of hydrogen-covered Ge(105) surface with different amounts of Ge to find that the hydrogen adsorption on the Ge(105) surfaces with Ge coverages of less than 1.4 ML makes the surface remarkably unstable and results in the roughening of the surface. This fact indicates that the hydrogen adsorption on Ge(105) increases the surface strain by arresting the strain-relief mechanism via the formation of sp^2-hybridized dimers on the Ge(105) surface. Thus, the formation of Ge(105) will be unfavorable and suppressed under the existence of adsorbed hydrogen.

Report

(3 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • Research Products

    (29 results)

All 2005 2004 2003 Other

All Journal Article (28 results) Publications (1 results)

  • [Journal Article] 半導体ヘテロ構造における表面・界面歪み制御2005

    • Author(s)
      藤川安仁, 櫻井利夫
    • Journal Title

      固体物理 (in press)

    • NAID

      40006915002

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] (最近の研究から)半導体ナノ構造の構成要素としての表面構造-高指数表面の研究を通じて-2005

    • Author(s)
      藤川安仁, 櫻井利夫
    • Journal Title

      日本物理学会誌 (in press)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Hydrogen-Induced Instability of the Ge(105) Surface2005

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

      Phys.Rev.Lett. 94

      Pages: 86105-86105

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Thin bismuth film as a template for pentacene growth2005

    • Author(s)
      J.T.Sadowski et al.
    • Journal Title

      Appl.Phys.Lett. 86

      Pages: 73109-73109

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Structural transition of pentacene monolayer on Ga bilayer : From brick-wall structure to herringbone pattern of molecular dimers2005

    • Author(s)
      J.Z.Wang et al.
    • Journal Title

      Surf.Sci. 579

      Pages: 80-88

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Alkali Metal Adsorption on the Si(111)-(7x7) Surface2005

    • Author(s)
      K.H.Wu et al.
    • Journal Title

      Chinese J.Phys. 43

      Pages: 197-211

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Development of a metal-tip cantilever for noncontact atomic force microscopy2005

    • Author(s)
      K.Akiyama et al.
    • Journal Title

      Rev.Sci.Instrum. 76

      Pages: 33705-33705

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Surface and Interface Strain Control of Semiconductor Heterostructure.2005

    • Author(s)
      Y.Fujikawa, T.Sakurai
    • Journal Title

      Kotai Butsuri (in press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] (From Recent Studies) Surface Structure as a Building Block of Semiconductor Nanostructure -Study of High Index Surface-.2005

    • Author(s)
      Y.Fujikawa, T.Sakurai
    • Journal Title

      Butsuri (in press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Hydrogen-Induced Instability of the Ge(105) Surface2005

    • Author(s)
      Yasunori Fujikawa, T.Nagao, Y.Yamada-Takamura, T.Sakurai, T.Hashimoto, Y.Morikawa, K.Terakura, M.G.Lagally
    • Journal Title

      Phys.Rev.Lett. 94

      Pages: 86105-86105

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Thin bismuth film as a template for pentacene growth.2005

    • Author(s)
      J.T.Sadowski, T.Nagao, S.Yaginuma, Y.Fujikawa, A.Al-Mahboob, K.Nakajima, T.Sakurai, G.E.Thayer, R.M.Tromp
    • Journal Title

      Appl.Phys.Lett. 86

      Pages: 73109-73109

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Structural transition of pentacene monolayer on Ga bilayer : From brick-wall structure to herringbone pattern of molecular dimers.2005

    • Author(s)
      Jun-Zhong Wang, Ke-Hui Wu, Wei-Sheng Yang, Xing-Jun Wang, J.T.Sadowski, Y.Fujikawa, T.Sakurai
    • Journal Title

      Surf.Sci. 579

      Pages: 80-88

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Alkali Metal Adsorption on the Si(111)-(7x7) Surface.2005

    • Author(s)
      Ke-hui Wu, Y.Fujikawa, Y.Takamura, T.Sakurai
    • Journal Title

      Chinese J.Phys. 43

      Pages: 197-211

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Development of a metal-tip cantilever for noncontact atomic force microscopy.2005

    • Author(s)
      Kotone Akiyama, T.Eguchi, T.An, Y.Fujikawa, Y.Yamada-Takamura, T.Sakurai, Y.Hasegawa
    • Journal Title

      Rev.Sci.Instrum. 76

      Pages: 33705-33705

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Hydrogen-Induced Instability of the Ge(105) Surface2005

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

      Phys.Rev.Lett. 94・8

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Imaging of All Dangling Bonds and Their Potential on the Ge/Si(105) Surface by Noncontact Atomic Force Microscopy2004

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

      Phys.Rev.Lett. 93

      Pages: 266102-266102

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Nanofilm Allotrope and Phase Transformation of Ultrathin Bi Film on Si(111)-7x72004

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

      Phys.Rev.Lett. 93

      Pages: 105501-105501

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Step-by-step cooling of a two-dimensional Na gas on the Si(111)-(7x7) surface2004

    • Author(s)
      K.H.Wu et al.
    • Journal Title

      Phys.Rev.B 70

      Pages: 195417-195417

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Bilayer-by-bilayer etching of 6H-GaN (0001) with Cl2004

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

      Surf.Sci. 561

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Imaging of All Dangling Bonds and Their Potential on the Ge/Si(105) Surface by Noncontact Atomic Force Microscopy.2004

    • Author(s)
      T.Eguchi, Y.Fujikawa, K.Akiyama, T.An, M.Ono, T.Hashimoto, Y.Morikawa, K.Terakura, T.Sakurai, M.G.Lagally, Y.Hasegawa
    • Journal Title

      Phys.Rev.Lett. 93

      Pages: 266102-266102

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Nanofilm Allotrope and Phase Transformation of Ultrathin Bi Film on Si(111)-7x7.2004

    • Author(s)
      T.Nagao, J.T.Sadowski, M.Saito, S.Yaginuma, Y.Fujikawa, T.Kogure, T.Ohno, Y.Hasegawa, S.Hasegawa, T.Sakurai
    • Journal Title

      Phys.Rev.Lett. 93

      Pages: 105501-105501

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Step-by-step cooling of a two-dimensional Na gas on the Si(111)-(7x7) surface.2004

    • Author(s)
      Kehui Wu, A.I.Oreshkin, Y.Takamura, Y.Fujikawa, T.Nagao, T.Briere, V.Kumar, Y.Kawazoe, R.F.Dou, Q.K.Xue, T.Sakurai
    • Journal Title

      Phys.Rev. B70

      Pages: 195417-195417

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Bilayer-by-bilayer etching of 6H-GaN(0001) with Cl.2004

    • Author(s)
      S.Kuwano, Q.-Z.Xue, Y.Asano, Y.Fujikawa, Q.-K.Xue, Koji S.Nakayama, T.Nagao, T.Sakurai
    • Journal Title

      Surf.Sci. 561

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Imaging of All Dangling Bonds and Their Potential on the Ge/Si(105) Surface by Noncontact Atomic Force Microscopy2004

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

      Phys.Rev.Lett. 93・26

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Na Adsorption on The Si(111)-(7x7) Surface : From Two Dimensional Gas to Nanocluster Array2003

    • Author(s)
      K.H.Wu et al.
    • Journal Title

      Phys.Rev.Lett. 91

      Pages: 126101-126101

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Surface pre-melting and surface flattening of Bi nanofilms on Si(111)-7x72003

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

      Surf.Sci. 547

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Na Adsorption on The Si(111)-(7x7) Surface : From Two Dimensional Gas to Nanocluster Array2003

    • Author(s)
      Kehui Wu, Y.Fujikawa, T.Nagao, Y.Hasegawa, K.S.Nakayama, Q.K.Xue, E.G.Wang, T.Briere, V.Kumar, Y.Kawazoe, S.B.Zhang, T.Sakurai
    • Journal Title

      Phys.Rev.Lett. 91

      Pages: 126101-126101

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Surface pre-melting and surface flattening of Bi nanofilms on Si(111)-7x7.2003

    • Author(s)
      S.Yaginuma, T.Nagao, J.T.Sadowski, A.Pucci, Y.Fujikawa, T.Sakurai
    • Journal Title

      Surf.Sci. 547

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Publications] kehui Wu, Y.Fujikawa et al.: "Na Adsorption on The Si(111)-(7x7)Surface : From Two Dimensional Gas to Nanocluster Array"Phys.Rev.Lett.. 91,126101. 1-4 (2003)

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2021-04-07  

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