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A study of superconducting fluctuation spectroscopy

Research Project

Project/Area Number 16560019
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied materials science/Crystal engineering
Research InstitutionOyama National College of Technology

Principal Investigator

MORI Natsuki  Oyama National College of Technology, 電気情報工学科, 教授 (60149911)

Project Period (FY) 2004 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 2006: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2005: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2004: ¥1,200,000 (Direct Cost: ¥1,200,000)
KeywordsSuperconducting fluctuation / High-Tc superconductors / Short-wavelength fluctuation / AC susceptibility / Impurity effects / Spectroscopy / 電子輸送特性 / 臨界電流密度 / 高温超伝導体 / 電気伝導特性 / 異方性因子 / 臨界電流 / 輸送特性
Research Abstract

In this research, we have studied both theoretically and experimentally the fluctuation conductivity o' analysis in high-Tc superconductors from a viewpoint of the short-wavelength fluctuation (SWF).
1. Theoretical aspects : We have extended existing theories of o' to the cases of high-Tc superconductors with intrinsic properties. (1-1) In-plane o' of Aslamazov-Larkin (AL) term, anomalous Maki-Thompson (MT) term and the 3^<rd> term including regular MT and density-of-state terms is extended to the case of SWF. (1-2) The same approach is applied to out-of-plane o' for each term. (1-3) Also considered in SWF regime are effects of two to three dimensionality and effects of two-band character.
2. Experimental aspects : Above-obtained expressions have been adopted to analyze experiments on the following systems (2-1) Films and polycrystalline systems of YBa_2Cu_3O_<7-y> with impurities. (2-2) Polycrystalline LaBaCaCu_3O_<7-δ>. (2-3) Polycrystalline (Bi, Pb)_2Sr_2Ca_2Cu_3O_y. (2-4) Bi_2Sr_2(Ca … More _<1-x>Y_x)Cu_2O_<8+δ> single crystals. Theory (1-1) has been employed to o' analyses in (2-1〜2-4) systems, finding excellent fits to o' data, from which we can estimate various parameters which include conduction dimensionality, fluctuation amplitude C_F, anisotropic parameter r, cutoff parameter α, scattering lifetime τ, phase-coherent time τ_φ, and pair-braking parameter δ.
3. Results for analyses : Among these parameters, r, a and τ_φ are common factors that characterize properties of the systems especially from a viewpoint of sample quality. Other theoretical studies (1-2,1-3) have been applied to experimental data reported by others. Most of analyses have provided satisfactory descriptions on experiments, which allows us finding parameters that could be important to characterize each superconducting system, such as in-plane and out-of-plane coherence lengths and interband coupling strength. Most of our analyses support the existence of the MT term, and hence at least only a d-wave nature is not entirely responsible for a mechanism of superconductivity. In conclusion, we are of the opinion that our method of o' analyses gain important insights into superconducting properties, providing a new spectroscopic study of superconductivity. Less

Report

(4 results)
  • 2006 Annual Research Report   Final Research Report Summary
  • 2005 Annual Research Report
  • 2004 Annual Research Report
  • Research Products

    (36 results)

All 2007 2006 2005 2004

All Journal Article (36 results)

  • [Journal Article] 高温超伝導体におけるc軸方向電気伝導率に対する短波長揺らぎ伝導率の効果2007

    • Author(s)
      米澤峻光, 今成一雄, 森夏樹
    • Journal Title

      電気学会東京支部栃木支所究発表会資料 (ETT-06) 1

      Pages: 12-15

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] 超伝導揺らぎ領域における多結晶LaBaCaCu_3O_<7-δ>系の特性評価2007

    • Author(s)
      箕輪亮平, 森夏樹
    • Journal Title

      電気学会東京支部栃木支所究発表会資料(ETT-06) 1

      Pages: 16-19

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Microscopic theoretical evaluation of c-axis paraconductivity in short-wavelength fluctuation regime2007

    • Author(s)
      T.Yonezawa, K.Imanari, N.Mori
    • Journal Title

      Extended Abstract (The 68^<th> Autumn Meeting) ; The Japan Society of Applied Physics

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] 高温超伝導におけるc軸方向電気伝導率に対する短波長揺らぎ伝導率の効果2007

    • Author(s)
      米澤峻光, 今成一雄, 森夏樹
    • Journal Title

      電気学会東京支部栃木支所究発表会資料(ETT-06)

      Pages: 12-15

    • Related Report
      2006 Annual Research Report
  • [Journal Article] 超伝導揺らぎ領域における多結晶LaBaCaCu_3O_<7-5>系の特性評価2007

    • Author(s)
      箕輪亮平, 森夏樹
    • Journal Title

      電気学会東京支部栃木支所究発表会資料(ETT-06)

      Pages: 16-19

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Thermoelectric power and resistivity in Nd_<2-x>Ce_xCuO_4 system2006

    • Author(s)
      N.Mori, T.Kameyama, H.Enomoto, H.Ozaki, Y.Takano, K.Sekizawa
    • Journal Title

      Journal of Alloys and Compounds 408-412

      Pages: 1222-1225

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Journal Article] Short-wavelength fluctuation effect on the c-axis paraconductivity within the Ginzburg-Landau theory2006

    • Author(s)
      N.Mori
    • Journal Title

      Physica C 445-448

      Pages: 154-157

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] A comparative study of thermoelectric properties in (Pr,Y)BaCu_3O_7 and PrBaCu_3O_7-Ag percolative systems.2006

    • Author(s)
      N.Mori, H.Okano, A.Furuya
    • Journal Title

      Physica Status Solidi (a) 203

      Pages: 2828-2831

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Ginzburg-Landau理論に基づく2-band超伝導体の揺らぎ伝導率2006

    • Author(s)
      米澤峻光, 森夏樹
    • Journal Title

      第53回応用物理学関係連合講演会・講演予稿集 1

      Pages: 253-253

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Journal Article] LaBaCaCu_3O_<7-y>超伝導体の交流帯磁率と揺らぎ伝導率2006

    • Author(s)
      箕輪亮平, 米澤峻光, 野口聖, 森夏樹
    • Journal Title

      第53回応用物理学関係連合講演会・講演予稿集 1

      Pages: 254-254

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Journal Article] 導電性酸化物を含むBi2223系焼結体の交流帯磁率による評価2006

    • Author(s)
      畔上新一, 森夏樹
    • Journal Title

      第53回応用物理学関係連合講演会・講演予稿集 1

      Pages: 280-280

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Journal Article] 高温超伝導揺らぎ伝導率の次元交差に関する一考察2006

    • Author(s)
      森夏樹
    • Journal Title

      第67回応用物理学会学術講会講演予稿集 1

      Pages: 246-246

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] A comparative study of thermoelectric properties in (Pr, Y)BaCu_3O_7 and PrBaCu_3O_7-Ag percolative systems2006

    • Author(s)
      N.Mori, H.Okano, A.Furuya
    • Journal Title

      Physica Status Solidi (a) 203

      Pages: 2828-2831

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Fluctuation conductivity analysis for Bi_2Sr_2(Ca_<1-x>Y_x)Cu_2O_<8+δ> single crystals in both overdoped and underdoped regimes2006

    • Author(s)
      T.Aoki, Y.Oikawa, C.Kim, T.Tamura, H.Ozaki N.Mori
    • Journal Title

      Physica C 445-448

      Pages: 154-157

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Paraconductivity in a two-band superconductor on the basis of the Ginzburg-Landau theory2006

    • Author(s)
      T.Yonezawa, N.Mori
    • Journal Title

      Extended Abstract (The 53^<rd> Spring Meeting) ; The Japan Society of Applied Physics and Related Societies 1

      Pages: 253-253

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] AC susceptibility and paraconductivity in LaBaCaCu_3O_<7-δ> superconductor2006

    • Author(s)
      R.Minowa, T.Yonezawa, S.Noguchi, N.Mori
    • Journal Title

      Extended Abstract (The 53^<rd> Spring Meeting) ; The Japan Society of Applied Physics and Related Societies 1

      Pages: 254-254

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Characterization of sintered Bi2223 system with conductive oxide by AC susceptibility.2006

    • Author(s)
      S.Azegami, N.Mori
    • Journal Title

      Extended Abstract (The 53^<rd> Spring Meeting) ; The Japan Society of Applied Physics and Related Societies 1

      Pages: 280-280

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] A consideration on dimensional crossover in high-Tc superconducting fluctuation conductivity2006

    • Author(s)
      N.Mori
    • Journal Title

      Extended Abstract (The 67^<th> Autumn Meeting) ; The Japan Society of Applied Physics 1

      Pages: 246-246

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Effect of short-wavelength fluctuation on the c-axis electrical conductivity in a high-Tc superconductor2006

    • Author(s)
      T.Yonezawa, K.Imanari N.Mori
    • Journal Title

      Abstract of ETT-06 in the Institute of Electrical Engineers of Japan 1

      Pages: 12-15

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Characterization of polycrystalline LaBaCaCu_3O_<7-δ> system in the fluctuation regime.2006

    • Author(s)
      R.Minowa, N.Mori
    • Journal Title

      Abstract of ETT-06 in the Institute of Electrical Engineers of Japan 1

      Pages: 16-19

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Fluctuation conductivity analysis for Bi_2Sr_2(Ca_1-xY_x)Cu_2O_8+δ single crystals in both overdoped and underdoped regimes.2006

    • Author(s)
      N.Mori, T.Aoki, Y.Oikawa, C.Kim, T.Tamura, H.Ozaki
    • Journal Title

      Abstracts of 19th International Symposium on Superconductivity 1

      Pages: 176-176

    • Related Report
      2006 Annual Research Report
  • [Journal Article] A Comparative study of thermoelectric properties in (Pr,Y)Ba_2Cu_3O_7 and PrBa_2Cu_3O_7-Ag percolative system2006

    • Author(s)
      N.Mori, H.Okano, A.Furuya
    • Journal Title

      Book of Abstracts in 15th International Conference on Ternary and Multinary Compounds 1

    • Related Report
      2005 Annual Research Report
  • [Journal Article] 211相を含むRE123系超伝導溶融体の揺らぎ伝導率解析2005

    • Author(s)
      石倉大介, 中根央, 山崎貞郎, 吉澤秀治, 森夏樹
    • Journal Title

      第52回応用物理学関係連合講演会講演予稿集 1

      Pages: 269-269

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary 2004 Annual Research Report
  • [Journal Article] 高温超伝導体のc軸成方向揺らぎ伝導率の理論解析2005

    • Author(s)
      大塚康行, 森夏樹
    • Journal Title

      第52回応用物理学関係連合講演会講演予稿集 1

      Pages: 269-269

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Analyses of paraconductivity and AC susceptibility in polycrystalline (Bi,Pb)_2Sr_2Ca_2Cu_3O_y superconductors2005

    • Author(s)
      N.Mori
    • Journal Title

      Abstracts of 18th International Symposium on Superconductivity 1

      Pages: 176-176

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Journal Article] 非晶質と微結晶In_2O_3 : Sn薄膜における電子輸送特性への熱処理効果2005

    • Author(s)
      塚田大, 荒木孝, 森夏樹
    • Journal Title

      薄膜材料デバイス研究会(第2回研究集会)「低温プロセス技術の再発見」アブストラクト集 1

      Pages: 71-71

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Fluctuation conductivity analysis of RE123 melt-textured superconductors with 211 phase2005

    • Author(s)
      D.Ishikura, H.Nakane, S.Yamazaki, S.Yoshizawa, N.Mori
    • Journal Title

      Extended Abstract (The 52^<nd> Spring Meeting) ; The Japan Society of Applied Physics and Related Societies 1

      Pages: 269-269

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Theoretical analysis of c-axis fluctuation conductivity in a high temperature superconductor2005

    • Author(s)
      Y.Otsuka, N.Mori
    • Journal Title

      Extended Abstract (The 52^<nd> Spring Meeting) ; The Japan Society of Applied Physics and Related Societies 1

      Pages: 269-269

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Analyses of paraconductivity and AC susceptibility2005

    • Author(s)
      N.Mori
    • Journal Title

      Abstracts of 18th International Symposium on Superconductivity 1

      Pages: 176-176

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Postannealing effects on electronic transport properties in amorphous and micro-crystalline In_2O_3 : Sn thin films2005

    • Author(s)
      D.Tsukada, T.Araki, N.Mori
    • Journal Title

      Abstract of 2^<nd> Thin Film, Materials and Devices Meetings 1

      Pages: 71-71

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Short-wavelength fluctuation effect on the c-axis paraconductivity within the Ginzburg-Landau theory2005

    • Author(s)
      N.Mori
    • Journal Title

      Abstracts of 18th International Symposium on Superconductivity 1

      Pages: 176-176

    • Related Report
      2005 Annual Research Report
  • [Journal Article] 非晶質と微結晶In_2O_3:Sn薄膜における電子輸送特牲への熱処理効果2005

    • Author(s)
      塚田大, 荒木孝, 森夏樹
    • Journal Title

      薄膜材料デバイス研究会(第2回研究集会)「低温プロセス技術の再発見」アブストラクト集 1

      Pages: 71-71

    • Related Report
      2005 Annual Research Report
  • [Journal Article] 高温超伝導体のc軸方向揺らぎ伝導率の理論解析2005

    • Author(s)
      大塚康行, 森夏樹
    • Journal Title

      第52回応用物理学関係連合講演会講演予稿集 1

      Pages: 269-269

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Fluctuation conductivity in (Bi,Pb)_2Sr_2Ca_2Cu_3O_y/Ag multi-layered bulk system2004

    • Author(s)
      H.Satoh, T.Tanabe, H.Nakane, S.Yoshizawa, N.Mori
    • Journal Title

      Physica C 412-414

      Pages: 307-311

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Fluctuation conductivity in (Bi, Pb)_2Sr_2Ca_2Cu_3O_γ/Ag multi-layered bulk system2004

    • Author(s)
      H.Satoh, T.Tanabe, H.Nakane, S.Yoshizawa, N.Mori
    • Journal Title

      Physica C 412-414

      Pages: 307-311

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Fluctuation conductivity in (Bi,Pb)_2Sr_2Ca_2CuaOy/Ag multi-layered bulk system2004

    • Author(s)
      H.Satoh, T.Tanabe, H.Nakane, S.Yoshizawa, N.Mori
    • Journal Title

      Physica C 412-414

      Pages: 307-311

    • Related Report
      2004 Annual Research Report

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Published: 2004-04-01   Modified: 2016-04-21  

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