IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), February 2018. Plenary presentation PL6-INV was given at ISS 2017, December 13-15, 2017, Tokyo, Japan. 30 Years 30 rs of His History ry and Future re Pers rspect ctiv ives of Superco rconduct ctin ing Ele Elect ctro ronic ics Horst Rogalla University of Colorado at Boulder (ECEE Department), Boulder, USA NIST (Superconductive Electronics) Boulder, USA and IEEE Council on Superconductivity
IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), February 2018. Plenary presentation PL6-INV was given at ISS 2017, December 13-15, 2017, Tokyo, Japan. 30 years of history don’t seem long seen the age of superconductivity of 106 years. But: a lot happened in these last 30 years: - Commercial LCD Flat Screen TVs - Blue LEDs - The High-Tc “Revolution” - The International Superconductivity Technology Center was founded - New Applied Superconductivity Conferences started: ISS in 1988 EUCAS in 1993 - Qubits Josephson π -junctions - - Magnetic Josephson junctions - ... - 1 November 1987: I became Physics Professor at the University of Twente in The Netherlands. - Some of you were born in the last 30 years. 2
IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), February 2018. Plenary presentation PL6-INV was given at ISS 2017, December 13-15, 2017, Tokyo, Japan. 30 years of history don’t seem long seen the age of superconductivity of 106 years But so much happened in these last 30 years in Superconductive Electronics that it would take hours to review the achievements. Session ED6 (Electronic Devices) - 30 Years of SQUIDs R.J. Ilmomiemi Detectors J.N. Ullom Microwave Devices S. Ohshima Digital Circuits A. Fujimaki Quantum Information J.-S. Tsai A subjective (re-) view without any claim of completeness 3
IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), February 2018. Plenary presentation PL6-INV was given at ISS 2017, December 13-15, 2017, Tokyo, Japan. SuperADC RSFQ-HTS Prof. Hasuo EUCAS 2011 4
IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), February 2018. Plenary presentation PL6-INV was given at ISS 2017, December 13-15, 2017, Tokyo, Japan. HTS 5
IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), February 2018. Plenary presentation PL6-INV was given at ISS 2017, December 13-15, 2017, Tokyo, Japan. First ‘HTS’ (Nb 3 Ge) Applications Serial array of Nb 3 Ge nanobridges H. Rogalla, M. Mueck et al. (1985) Integrated Nb3Ge nano-bridge dc-SQUID operated in liquid hydrogen above 20K 6
IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), February 2018. Plenary presentation PL6-INV was given at ISS 2017, December 13-15, 2017, Tokyo, Japan. Critical Temperature as Function of Time 1000 BiSrCaCuO HgBaCaCuO YBaCuO Critical Temperature [K] 100 La-Ba-Cu-O (logarithmic scale) MgB 2 NbONbN Nb 3 Sn Nb-Al-GeNb 3 Ge 10 Nb Pb Hg 1 1910 1930 1950 1970 1990 7
IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), February 2018. Plenary presentation PL6-INV was given at ISS 2017, December 13-15, 2017, Tokyo, Japan. The Begin: How to fabricate an HTS-SQUID Polycrystalline junctions Press and sinter powder into 4.2K the form of a bulk cylinder, drill a hole and cut partially with a thin saw. Break the link and press it together again with an adjustable screw or taper. Voilà – the SQUID is ready !! 81K R.Koch, IBM; Twente (1987) J. E. Zimmerman, J. A. Beall, M. W. Cromar, and R. H. Ono: Appl.Phys.Lett. 51, 617 (1987) 8
IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), February 2018. Plenary presentation PL6-INV was given at ISS 2017, December 13-15, 2017, Tokyo, Japan. Bi-crystal Grain Boundary Junctions 107 φ [100] [100] 106 [100]-tilt ) 2 m c / A 105 γ ( [100] [100] c J 104 [100]-twist [001] [001] T = 4.2 K 103 θ 0 10 20 30 40 µ 100 m Angle (degrees) [ 001]-tilt Hilgenkamp & Mannhart, Appl. Phys. Lett. 73 , 265 (‘98) H. Hilgenkamp, H. Rogalla et al., Appl. Phys. Lett. 64 , 3497 (‘94). Dimos D., Chaudhari P., Mannhart J., Le Goues F.K.: Phys.Rev.Lett. 61, 219 (1988) 9
IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), February 2018. Plenary presentation PL6-INV was given at ISS 2017, December 13-15, 2017, Tokyo, Japan. The Begin: Thin Film Josephson Junctions Template Junctions Step-edge junctions Jia et al. Physica C 175, 545 (1991 ) L.P. Lee, K. Char, et al. (Conductus Inc.) J. Du et al. Supercond. Sci, Technol. 21 , 125025 2008. 10
IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), February 2018. Plenary presentation PL6-INV was given at ISS 2017, December 13-15, 2017, Tokyo, Japan. Ramp-type Junctions with Ga-doped PBCO barrier Barrier thickness and Ga-doping of PBCO are design parameters J.Gao, Y.M. Boguslavskij, B.B.G. Klopman, D. Terpstra, G.J. Gerritsma, H. Rogalla , 11 Appl.Phys.Lett 59, 2754 (1991)
IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), February 2018. Plenary presentation PL6-INV was given at ISS 2017, December 13-15, 2017, Tokyo, Japan. SuperADC 12
IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), February 2018. Plenary presentation PL6-INV was given at ISS 2017, December 13-15, 2017, Tokyo, Japan. Pulse Stretcher (Twente, SuperADC) 13
IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), February 2018. Plenary presentation PL6-INV was given at ISS 2017, December 13-15, 2017, Tokyo, Japan. Multi-Layer HTS Integration with Ramp-Type Junctions (ISTEC) Standard deviation of Ic: 8.1% for Ic= 0.5 mA junctions Deposition of gold for Via hole for oxidizing Smooth surface decreasing contact ground plane with Ra=1.2 nm resistance Superconducting contact Au JJ SSO V-Ti resistor with sheet V-Ti CE(La-YbBCO) Resistance of 20 Ω BE(La-YBCO) SrSnO 3 (SSO) GP(La-YBCO) MgO substrate Hasuo, ISTEC, Summerschool on Superconducting Electronics (2005) 14
IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), February 2018. Plenary presentation PL6-INV was given at ISS 2017, December 13-15, 2017, Tokyo, Japan. HTS 100 JJ circuit (ISTEC) Ring Oscillator (21 JJ, Toshiba) 57 GHz @20K Circuit including 101 JJs Signal Signal (1mA/div) (1mA/div) SFQ-dc SFQ-dc dc-SFQ dc-SFQ JTL(16JJx6) JTL(16JJx6) Reset Reset Conv. Conv. (100 µ A/div) (100 µ A/div) Output Output Circuit (0.2mV/div) (0.2mV/div) ∑ - Δ AD modulator (13 JJ, Hitachi) 100 GHz @20K Opera ｔ ion at 29 K Ref: H.Wakana et al （ ISTEC), ISS2004 15
IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), February 2018. Plenary presentation PL6-INV was given at ISS 2017, December 13-15, 2017, Tokyo, Japan. Dr. K. Tanabe 16
IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), February 2018. Plenary presentation PL6-INV was given at ISS 2017, December 13-15, 2017, Tokyo, Japan. HTS multilayer technology developed at ISTEC for SFQ circuits (2000’s) Signal line Signal line Matching Matching resistor resistor Read-out Read-out SQUID SQUID Trigger line Trigger line 3 RE-123 layers with SrSnO 3 (SSO) insulator R a of sputtered multilayer < 2 nm Pulse Pulse Comparator Comparator Ramp-edge JJs with 1 σ I c spread 5-10 % generator generator Minimum junction width of 1.5 µ m HTS Sampler circuit with a potential bandwidth over 100 GHz (15 JJs integrated) Dr. K. Tanabe 17
IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), February 2018. Plenary presentation PL6-INV was given at ISS 2017, December 13-15, 2017, Tokyo, Japan. Superconducting sampling oscilloscope 2 Superconductors Band Width (GHz) Sampling 100 Oscilloscope 6 Prototype 5 4 3 Semiconductors 2 Chip and 10 Package 1980 1990 2000 2010 Year 0.025 (c) 20 GHz 0.015 A) easur ed I s ( m 0.005 -0.005 M -0.015 -0.025 0 20 40 60 80 100 120 140 Time (ps) Ref: M.Hidaka (NEC) et al., ASC 2000 Waveform of 20GHz 18
IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), February 2018. Plenary presentation PL6-INV was given at ISS 2017, December 13-15, 2017, Tokyo, Japan. Dr. K. Tanabe 19
IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), February 2018. Plenary presentation PL6-INV was given at ISS 2017, December 13-15, 2017, Tokyo, Japan. Dr. K. Tanabe 20
IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), February 2018. Plenary presentation PL6-INV was given at ISS 2017, December 13-15, 2017, Tokyo, Japan. 21 Dr. K. Tanabe
IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), February 2018. Plenary presentation PL6-INV was given at ISS 2017, December 13-15, 2017, Tokyo, Japan. Dr. K. Tanabe 22
IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), February 2018. Plenary presentation PL6-INV was given at ISS 2017, December 13-15, 2017, Tokyo, Japan. 23
IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), February 2018. Plenary presentation PL6-INV was given at ISS 2017, December 13-15, 2017, Tokyo, Japan. MCG (Hitachi) HTS 16ch MCG 24 Harold Weinstock, 2005
IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), February 2018. Plenary presentation PL6-INV was given at ISS 2017, December 13-15, 2017, Tokyo, Japan. LTS 25
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