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(In Japanese)銅酸化物超伝導体単結晶を用いる超高速集積デバイス

Research report code R000000206
Posted date Sep 30, 2002
Researchers
  • (In Japanese)山下 努
Affiliation
  • (In Japanese)東北大学未来科学技術共同研究センター
Research organization
  • (In Japanese)東北大学未来科学技術共同研究センター
Report name (In Japanese)銅酸化物超伝導体単結晶を用いる超高速集積デバイス
Technology summary (In Japanese)高品位の高温超伝導体単結晶の微細加工技術を確立して1μm2以下の微小なデバイスを作成できた。これによりサブミクロンの素子で単一超伝導電子トンネル効果が起きたことを見いだすと共に,固有ジョセフソン効果における量子サイズ干渉効果を観測できた。グループAは微小単結晶接合を作成して,その特性などを測定した。また,固有ジョセフソン接合のフラウンホーハーパターンの観測に成功した。グループBはLa214系およびBi2212系酸化物超伝導体単結晶を育成すると共に,新規単結晶育成技術等を開発した。グループCはBi2Sr2CaCu2O4単結晶を用いて,その固有ジョセフソン接合積層系におけるジョセフソン・ボルテックス・ダイナミックスおよび高周波特性を明らかにした。グループDはプラズマの超放射状態の安定な出現を予測し,その出現領域が固有ジョセフソン接合において広く現れることを指摘した。
Research field
  • Interferometry and interferometers
  • Crystal structure of metal oxides and chalcogenides
  • Manufacturing technology of solid‐state devices
  • Measurement, testing and reliability of solid‐state devices
Published papers related (In Japanese)(1)“Experimental evidence for Coulomb charging effects in submicron Bi-2212 stacks” Yu. I. Latyshev, S.-J. Kim and T. Yamashita JETP Letters, Vol.69, No.1, pp.84-90, January 1999
(2)“Submicron stacked-junction fabrication from Bi2Sr2CaCu2O8+δ whiskers by focused-ion-beam etching” S.-J. Kim, Yu. I. Latyshev and T. Yamashita Appl. Phys. Let, Vol.74, No.8, pp.1156-1158, Feb. 1999
(3)“Intrinsic Josephson junctions in oxygen-deficient YBa2Cu3O7-δ film deposited on a substrate step” H.B. Wang, J. Chen, T. Tachiki, Y. Mizugaki, K. Nakajima and T. Yamashita J. Appl. Phys., Vol.85, No.7, pp.3740-3744, April 1999
(4)“Intrinsic Josephson Junction Array with Typical Tunneling Characteristics in Oxygen-deficient YBaCuO Thin Films” H.B. Wang, J. Chen, K. Nakajima and T. Yamashita IEEE Transactions on Applied Superconductivity, Vol.9, No.2, pp.3008-3011, June 1999
(5)“YBCO SQUIDs Fabricated by Field-Emission Electron Beam Source” S.-J. Kim, J. Chen, Y. Mizugaki, K. Nakajima and T. Yamashita IEEE Transactions on Applied Superconductivity, Vol.9, No.2, pp.3089-3092, June 1999
(6)“Focused Electron Beam Damaged YBCO Josephson Junctions for THz Device Applications” S.-J. Kim and T. Yamashita IEEE Transactions on Applied Superconductivity, Vol.9, No.2, pp.4221-4224, June 1999
(7)“Fabrication of Submicron BSCCO Stacked Junctions by Focused Ion Beam(FIB)” Yu. I. Latyshev, S.-J. Kim and T. Yamashita IEEE Transactions on Applied Superconductivity, Vol.9, No.2, pp.4312-4315, June 1999
(8)“Fabrication of Josephson Junctions on La-Sr-Cu-O Single Crystals” Y. Uematsu, H. Myoren, K. Nakajima, T. Yamashita, I. Tanaka and H. Kojima IEEE Transactions on Applied Superconductivity, Vol.9, No.2, pp.4296-4299, June 1999
(9)“Microwave-induced Current Steps in Intrinsic Josephson Junctions Patterned on Bi2Sr2CaCu2O8 Single Crystal” H.B. Wang, Y. Aruga, T. Tachiki, Y. Mizugaki, K. Nakajima, T. Yamashita and P.H. Wu Appl. Phys. Let, Vol.74, No.24, pp.3693-3695, June 1999
(10)“Submicron scale High-Tc superconducting stacks for single Cooper-pair tunnling” S.-J. Kim, Yu. I. Latyshev, T. Yamashita, N. Sato and S. Kishida Physica B, June 1999
(11)“Interlayer Transport of Quasiparticles and Cooper Pairs in Bi2Sr2CaCu2O8+δ Superconductors” Yu. I. Latyshev, T. Yamashita, L.N. Bulaevskii, M.J. Graf, A.V. Balatsky and M.P. Maley Physical Review Letters, Volume 82, Number 26, 28 June 1999
(12)“Three-Dimensional Intrinsic Josephson Junctions Using C-Axis YBa2Cu3O7-δ Thin Film” S.-J. Kim and T. Yamashita Jpn. J. Appl. Phys., Vol.38, No.11, pp.5069-5070, 1999, Sep. 1999
(13)“Single Cooper-pair tunneling junctions using high-Tc superconducting materials” S.-J. Kim, Yu. I. Latyshev and T. Yamashita IEEE Transactions on Magnetics, vol.35, No.5, pp.4094-pp.4096, Sep. 1999
(14)“Harmonic frequency mixing in Bi2Sr2CaCu2O8+x intrinsic Josephson junctions” H.B. Wang, Y. Aruga, T. Tachiki, Y. Mizugaki, J. Chen, K. Nakajima, T. Yamashita and P.H. Wu Appl. Phys. Let. Vol.75, No.15, pp.2310-2312, Oct. 1999
(15)“3D intrinsic Josephson junctions using c-axis thin films and single crystals” S.-J. Kim, Yu.I. Latyshev and T. Yamashita Superconductor Science and Technology, pp.729-731, 1999
(16)“RF responses of double-junction SQUID models” Yoshinao Mizugaki, J. Chen, Kensuke Nakajima and Tsutomu Yamashita Superconductor Science and Technology, pp.992-994, 1999
(17)“Flux-flow resonant current steps in intrinsic Josephson junctions on Bi2Sr2CaCu2O8 single crystal” H.B. Wang, T. Tachiki, Y. Aruga, Y. Mizugaki, J. Chen, K. Nakajima, T. Yamashita and P.H. Wu Superconductor Science and Technology, pp.1004-1006, 1999
(18)“Magnetically-Enhanced Terahertz Response of Josephson Junctions” Yoshinao Mizugaki, J. Chen, Kensuke Nakajima and Tsutomu Yamashita IEEE Transactions on Applied Superconductivity, 1999
(19)“Wide Band HTS Josephson Junction Detectors” Jian Chen, Kensuke Nakajima and Tsutomu Yamashita Singapore Journal of Physics, Vol.15, No.1, pp.67-75, December, 1999
(20)“Fluxon and Single Electron Devices Based on Intrinsic Josephson Effect” Tsutomu Yamashita, Sang-Jae Kim, Yuri Latyshev and Kensuke Nakajima Singapore Journal of Physics, Vol.15, No.1, pp.77-85, December, 1999
(21)“Josephson Switching Device Utilizing the Quantum Transitions in a Superconducting Quantum interference Device Loop” Yoshinao Mizugaki, Kei Saito, A.I. Braginski and Tsutomu Yamashita Japanese Journal of Applied Physics, Vol.39, pp.55-60, Part 1, No.1, January, 2000
(22)“Two-Junction SQUID Controlled by Both DC and RF Magnetic Flux” Yoshinao Mizugaki, Kei Saito, Tadayuki Kondo, J. Chen, Kensuke Nakajima, A.I. Braginski and Tsutomu Yamashita Advances in Superconductivity XII-Proceedings of the 12th International Symposium on Superconductivity (ISS'99), 2000
(23)“Microwave Responses of BSCCO-2212 Intrinsic Josephson Junctions at Frequencies Up to 100GHz” H.B. Wang, T. Tachiki, Y. Aruga, Y. Mizugaki, J. Chen, K. Nakajima, T. Yamashita and P.H. Wu Advances in Superconductivity, March 2000
(24)“Single-electron tunnelling devices based on intrinsic Josephson junctions in Bi-2212” T. Yamashita, S. Kim and Y. Latyshev Superconductor Science and Technology, pp.99-102, March 2000
Research project
  • Core Research for Evolutional Science and Technology;Phenomena of Extreme Conditions
Information research report
  • (In Japanese)山下 努. 極限環境状態における現象 銅酸化物超伝導体単結晶を用いる超高速集積デバイス. 戦略的基礎研究推進事業 平成11年度 研究年報.科学技術振興事業団, 2000. p.549 - 552.

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