Fluxon Dynamics of High-TC superconductor and device application for THz wave.

2010 Fiscal Year Final Research Report

• Project/Area Number: 20360151
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Electron device/Electronic equipment
• Research Institution: Yamagata University
• Principal Investigator: NAKAJIMA Kensuke Yamagata University, 大学院・理工学研究科, 教授 (70198084)
• Co-Investigator(Kenkyū-buntansha): WANG HuaーBing (独)物質・材料研究機構, 研究員 (70421427) ; WATANABE Takao 弘前大学, 大学院・理工学研究科, 教授 (40431431)
• Project Period (FY): 2008 – 2010
• Keywords: 高温超伝導体 / 固有ジョセフソン接合 / ボルテクス / テラヘルツ

Research Abstract

Bi_2Sr_2CaCu_2O_8(Bi-2212) High-T_C superconductor intrinsic Josephson junction(IJJ) is a promising candidate of intense terahertz emitting device. At present, elucidation of the interaction between the traveling fluxons and electromagnetic wave in the junction (Josephson plasma modes) are key to succeed in the terahertz emissions. In this research, we have elucidated (1) Antenna integration effects on flux-flow properties of Bi-2212 IJJ, (2) Excitation phenomena of plasma resonance mode of Bi-2212 IJJ by flux-flow, and demonstrated (3) Terahertz plasma resonance emission from current-injected Bi-2212 IJJ. In addition to above mentioned results, we have comprehensively studied carrier control of Bi-2212 single crystal which dominates junction parameters of Bi-2212 IJJ. As the result, we have found that a partial substitution of Ca site by Y can controls carrier concentration with no degradation in T_C.

Research Products

• [Journal Article] Cavity Resonance Effects on Phase-Locking of the Flux-Flow in Bi-2212 Intrinsic Josephson Junctions (2011)
  • Author(s): K.Nakajima, M.Isobe, T.Chiba, H.Yamada
  • Journal Title: IEEE Trans.Appl.Supercond. (in press.)
  • Peer Reviewed
• [Journal Article] Improvement in Power-Handling Capability of Superconducting Filters Using Multi-Layered Microstrip Line Resonators, IEEE Trans. (2011)
  • Author(s): Y.Endo, S.Ono, M.Uno, T.Saito, A.Saito, K.Nakajima, S.Ohshima
  • Journal Title: Appl.Supercond. (in press.)
  • Peer Reviewed
• [Journal Article] Intrinsic Surface Resistance of YBCO Thin, Films under DC Magnetic Field, IEEE Trans. (2011)
  • Author(s): K.Nakagawa, T.Honma, K.Takeda, S.Ono, H.Kai, A.Saito, M.Mukaida, K.Nakajima, S.Ohshima
  • Journal Title: Appl.Supercond. (in press.)
  • Peer Reviewed
• [Journal Article] Development of Trimming Technique for Superconducting Tunable Filters, IEEE Trans. (2011)
  • Author(s): T.Saito, S.Ono, M.Uno, Y.Endo, A.Saito, K.Nakajima, S.Ohshima
  • Journal Title: Appl.Supercond. (in press.)
  • Peer Reviewed
• [Journal Article] Coherent Terahertz Emission of Intrinsic Josephson Junction Stacks in the Hot Spot Regime (2010)
  • Author(s): H.B.Wang, S.Guenon, B.Gross, J.Yuan, Z.G.Jiang, Y.Y.Zhong, M.Grunzweig, A.Iishi, P.H.Wu, T.Hatano, D.Koelle, R.Kleiner
  • Journal Title: Phys.Rev.Lett. 105 Pages: 057002
  • Peer Reviewed
• [Journal Article] STM/STS study of electronic states in highly underdoped Bi2212 (2010)
  • Author(s): T.Kasai, S.Yamashita, H.Nakajima, T.Fujii, I.Terasaki, T.Watanabe, H.Shibata, A.Matsuda
  • Journal Title: Physica C vol.470 Pages: S173-S175
  • Peer Reviewed
• [Journal Article] Control of carrier concentration in Bi-2212 (2010)
  • Author(s): S.Yamashita, T.Kasai, T.Fujii, T.Watanabe, A.Matsuda
  • Journal Title: Physica C vol.470 Pages: S170-S172
  • Peer Reviewed
• [Journal Article] Hot spots and waves in Bi_2Sr_2CaCu_2O_8 intrinsic Josephson junction stacks - a study by Low Temperature Scanning Laser Microscopy (2009)
  • Author(s): H.B.Wang, S.Guenon, J.Yuan, A.Iishi, S.Arisawa, T.Hatano, T.Yamashita, D.Koelle, R.Kleiner
  • Journal Title: Phys.Rev.Lett. 102 Pages: 017006
  • Peer Reviewed
• [Journal Article] Significantly doping-dependent Josephson critical current -inhomogeneity in real space or heterogeneity in k-space (2009)
  • Author(s): M.Suzuki, T.Hamatani, Y.Yamada, K.Anagawa, T.Watanabe
  • Journal Title: J.Phys.: Conf.Ser. Vol.150 no.5 Pages: 52252
  • Peer Reviewed
• [Journal Article] RF impedance of intrinsic Josephson junction in flux-flow state with a periodic pinning potential and its optimum condition for RF radiation (2009)
  • Author(s): Y.Yamada, Ken. Nakajima, Koji Nakajima
  • Journal Title: Physica C. vol.469 Pages: 1088-1092
  • Peer Reviewed
• [Journal Article] Terahertz wave emission from intrinsic Josephson junctions in high-Tc superconductors (2009)
  • Author(s): L.Ozyuzer, Y.Simsek, H.Koseoglu, F.Turkoglu, C.Kurter, U.Welp, A.E.Koshelev, K.E.Gray, W.K.Kwok, T.Yamamoto, K.Kadowaki, Y.Koval, H.B.Wang, P Mueller
  • Journal Title: Supercond.Sci.Technol. 22 Pages: 114009
  • Peer Reviewed
• [Journal Article] RF responses and possible applications of intrinsic Josephson junctions in different vortex states (2008)
  • Author(s): Kensuke Nakajima, Yasuyuki Yamada, Tsutomu Yamashita
  • Journal Title: Physica C Vol.468 Pages: 660-663
  • Peer Reviewed
• [Journal Article] RF impedance of intrinsic Josephson junction in flux-flow state with a periodic pinning potential (2008)
  • Author(s): Y.Yamada, Ken. Nakajima, Koji Nakajima
  • Journal Title: Physica C Vol.468 Pages: 1295-1297
  • Peer Reviewed
• [Presentation] Internal and external resonance effects on the flux-flow properties of Bi-2212 intrinsic Josephson junctions (2010)
  • Author(s): Kensuke Nakajima, Masahiro Isobe, Takashi Chiba, Hironobu Yamada
  • Organizer: The 7th International Symposium on Intrinsic Josephson Effects and Plasma Oscillations in High-T_C Superconductors (PLASMA 2010)
  • Place of Presentation: Hirosaki, Japan.(招待講演)
  • Year and Date: 2010-05-01
• [Presentation] Novel features of vortex motion in Bi-2212 intrinsic Josephson junctions effected by resonance effects (2010)
  • Author(s): Kensuke Nakajima, Masahiro Isobe, Takashi Chiba, Hironobu Yamada
  • Organizer: International Conference on Superconductivity and Magnetism (ICSM2010)
  • Place of Presentation: Antalya, Turkey.(招待講演)
  • Year and Date: 2010-04-26
• [Presentation] External and Internal Resonation Effects on Bi-2212 intrinsic Josephson junctions in Flux-Flow State (2009)
  • Author(s): Kensuke Nakajima, Takashi Chiba, Hironobu Yamada
  • Organizer: East Asia Symposium on Supercondutor Electronics (EASSE2009)
  • Place of Presentation: Nanjing, China.(招待講演)
  • Year and Date: 2009-10-14
• [Presentation] Response of Collective Plasma Modes in Intrinsic Josephson Junctions to Electromagnetic Stimulation (2008)
  • Author(s): Kensuke Nakajima
  • Organizer: The 6th International Symposium on Intrinsic Josephson Effects and Plasma Oscillations in High-TC Superconductors (PLASMA 2008)
  • Place of Presentation: Pohang, Korea(招待講演)
  • Year and Date: 2008-07-19