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WO1996012305A1 - Anneau de commutation(squid) a boucle et resonateur supraconducteurs - Google Patents

Anneau de commutation(squid) a boucle et resonateur supraconducteurs Download PDF

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Publication number
WO1996012305A1
WO1996012305A1 PCT/DE1995/001397 DE9501397W WO9612305A1 WO 1996012305 A1 WO1996012305 A1 WO 1996012305A1 DE 9501397 W DE9501397 W DE 9501397W WO 9612305 A1 WO9612305 A1 WO 9612305A1
Authority
WO
WIPO (PCT)
Prior art keywords
resonator
squid
substrate
superconducting
loop
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/DE1995/001397
Other languages
German (de)
English (en)
Inventor
Martin Gottschlich
Yi Zhang
Heinz Chaloupka
Matthias Hein
Michael Jeck
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Forschungszentrum Juelich GmbH
Original Assignee
Forschungszentrum Juelich GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Forschungszentrum Juelich GmbH filed Critical Forschungszentrum Juelich GmbH
Priority to JP8512839A priority Critical patent/JPH10507314A/ja
Priority to EP95934050A priority patent/EP0787361A1/fr
Publication of WO1996012305A1 publication Critical patent/WO1996012305A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/035—Measuring direction or magnitude of magnetic fields or magnetic flux using superconductive devices
    • G01R33/0354—SQUIDS
    • G01R33/0358—SQUIDS coupling the flux to the SQUID
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N60/00—Superconducting devices
    • H10N60/10—Junction-based devices
    • H10N60/12—Josephson-effect devices
    • H10N60/124—Josephson-effect devices comprising high-Tc ceramic materials

Definitions

  • the invention relates to a super-quantum interference detector (SQUID) with a superconducting loop formed on one side of a substrate and containing a Josephson contact and a superconducting resonator which is provided for coupling to SQUID signals of the loop.
  • SQUID super-quantum interference detector
  • (Front) side of a substrate is formed a superconducting layer and is laterally structured in the form of a loop with a microbridge as a Josephson contact.
  • the SQUID loop is designed in such a way that, as a flow-focusing element, it simultaneously effects the focusing of a magnetic flux into the loop opening.
  • a superconducting resonator is provided on the front of the substrate, which is coupled to the SQUID loop.
  • the resonator is designed as a resonator, even if, for example, from M. Strupp et al. , Contribution to the Workshop on HTS Josephson Junctions and 3-Terminal Devices, University of Twente, The
  • a SQUID with an S-shaped - ⁇ / 2 resonator is known.
  • the resonator is manufactured in a microstrip configuration.
  • Such a SQUID with ⁇ / 2 resonator does have a relatively high energy resolution with relatively low noise.
  • the moderate is a disadvantage
  • Resonator quality in the order of up to about 3,000 at 77 K.
  • the SQUIDs with ⁇ / 2 resonator show only relatively small flux focussing elements on the resonator SQUID loop side of the substrate for space reasons, so that the field resolution is very low .
  • the washer SQUID as the base plate of a superconducting stripline resonator, which consists of three superconducting layers which are arranged one above the other and each separated by a substrate acting as a dielectric.
  • the middle superconducting layer is structured in the form of the resonator part.
  • the resonator part can optionally contain coupling lines.
  • the SQUID is positioned laterally at a location where the high-frequency current flows.
  • Q L is the loaded quality of the resonator. Since this can be very large in the present case, k can be chosen to be small.
  • the coupling k is the same as the HF current in the SQUID loop range.
  • a setting of k can thus be achieved on the one hand by lateral displacement of the SQUID relative to the resonator.
  • the change in k can also be set in a targeted manner by varying the distance between the SQUID and the resonator.
  • the third superconducting layer on the back of the second substrate is laterally structured in such a way that it matches the structuring of the SQUID loop structure on the front of the first
  • FIGS. 2a-c shows a schematic cross section through the SQUID according to the invention in the A-A plane indicated in FIGS. 2a-c,
  • FIG. 2a Schematic representation of the lateral
  • FIG. 2b shows a schematic representation of the lateral geometry of the U-shaped resonator on the second substrate
  • FIG. 2c shows a schematic representation of the lateral geometry of the third, superconducting layer on the back of the second substrate.
  • LaA103 substrate 1 shows a SQUID according to the invention in cross section through the AA plane shown in FIGS. 2a to 2c.
  • a former LaA103 substrate 1 has a superconducting YBa2Cu3 ⁇ 7 layer, which is laterally suitably structured to form the SQUID function (FIG. 2a).
  • a second LaAlC> substrate 3 has a lateral, U-shaped, superconducting YBa2C -3 ⁇ 7 layer on one side to form the resonator 4 (FIG. 2b).
  • the substrate 3 has a further, superconducting YBa2Cu3 ⁇ 7 layer on the back, the lateral geometry of which is shown in FIG. 2c.
  • the substrate 3 is positioned relative to the substrate 1 so that as a result three superconducting YBa2Cu3 ⁇ 7 layers arranged in parallel, each separated from one another by dielectric LaAl0 3 1 and 2, are formed.
  • FIGS. 2a to 2c The lateral geometries of the three superconducting layers 2, 4, 5 are shown schematically in FIGS. 2a to 2c.
  • the lateral structuring of the superconducting layer 2 has a guader-shaped layer area, in the middle of which there is a SQUID loop opening 6 of 50 * 50 ⁇ irr and also a superconducting microbridge as a Josephson contact 7 and a slit-shaped opening 8 - in order to maximize the flow-focusing Effect of layer 2 - are included.
  • 2b shows the superconducting, planar resonator 4 relative to the cuboid configuration of the superconducting layer 2 or 5 as a U-shaped structured superconducting layer 4.
  • FIG. 2c shows the lateral geometry of the superconducting layer 5. It corresponds to the superconducting micro bridge as Josephson contact 7 of the lateral geometry of the SQUID-forming layer 2, except for the superconducting micro bridge.
  • the corresponding loop opening 6 in the layer 5 is not the same size, but actually - to increase the flow-focusing effect of the layer 5 - too
  • the SQUID shown in FIGS. 1, 2a to 2c with a U-shaped resonator has a modular structure, so that this gives the possibility of exchanging the resonator 4 with substrate 3 and layer 5 for the system of substrate 1 and layer 2.
  • the quality (quality) of the resonator can be determined simply by using a superconducting film as the end plate instead of SQUIDs 1, 2.
  • the modular structure allows system 4, 3 and 5 as a test system for washer SQUIDs 1 and 2 with various parameters such as to use the SQUID inductor ß ⁇ .
  • a procedural approach e.g. find the optimal operating mode of a selected washer SQUID.
  • the present SQUID resonator system can also be used with readout electronics via two-port coupling, as described, for example, by M. Heinz et al., Contribution to the Workshop on HTS Josephson Junction and 3-Terminal Devices, University of Twente, The Netherlands, 2-4 May 1994 is known to be operated.
  • the SQUID according to the invention can be operated both in the RF range and at low frequencies with conventional readout electronics for RF washer SQUIDs.
  • U-shaped resonators for example S-shaped, ⁇ ⁇ or-/ 2 resonators can also be used in the SQUID according to the invention.
  • metallized isolators can be used as terminations of the resonator base plates, which meet the above-mentioned condition due to the frequency dependence of the skin depth.
  • substrate thicknesses of 0.5 mm and layer thicknesses for the superconducting layers 2, 4 and 5 of 200 nm YBa2Cu3 ⁇ 7 were selected.
  • the two ends of the U-shaped resonator were about 5 mm apart, the dimensions of the cuboid layers 2 and 5 were 8 * 8 mm.

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Superconductor Devices And Manufacturing Methods Thereof (AREA)
  • Measuring Magnetic Variables (AREA)

Abstract

L'invention concerne un anneau de commutation (SQUID) à boucle et résonateur supraconducteurs, comprenant une boucle supraconductrice formée en couches à l'avant d'un substrat et contenant une jonction Josephson, ainsi qu'un résonateur supraconducteur. L'invention a pour but l'obtention d'un SQUID à résonateur couplé présentant, par rapport aux SQUID connus, une résolution d'énergie accrue pour un plus faible bruit et une sensibilité dans le champ plus élevée. A cet effet, le résonateur est formé en couches et est connecté rigidement avec l'avant d'un deuxième substrat, le résonateur étant disposé à l'arrière du premier substrat. Le deuxième substrat présente, à l'arrière, une couche supraconductrice qui correspond latéralement géométriquement à la structure de la boucle du premier substrat, à l'exception du revêtement dans la zone de la jonction Josephson, un matériau diélectrique étant utilisé comme matériau de substrat.
PCT/DE1995/001397 1994-10-13 1995-10-07 Anneau de commutation(squid) a boucle et resonateur supraconducteurs Ceased WO1996012305A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP8512839A JPH10507314A (ja) 1994-10-13 1995-10-07 超伝導ループおよび共振器を備えたｓｑｕｉｄ
EP95934050A EP0787361A1 (fr) 1994-10-13 1995-10-07 Anneau de commutation(squid) a boucle et resonateur supraconducteurs

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4436448.2 1994-10-13
DE4436448A DE4436448C1 (de) 1994-10-13 1994-10-13 SQUID mit supraleitender Schleife und Resonator

Publications (1)

Publication Number Publication Date
WO1996012305A1 true WO1996012305A1 (fr) 1996-04-25

Family

ID=6530582

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1995/001397 Ceased WO1996012305A1 (fr) 1994-10-13 1995-10-07 Anneau de commutation(squid) a boucle et resonateur supraconducteurs

Country Status (4)

Country Link
EP (1) EP0787361A1 (fr)
JP (1) JPH10507314A (fr)
DE (1) DE4436448C1 (fr)
WO (1) WO1996012305A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003090161A3 (fr) * 2002-04-15 2005-02-17 Dwave Sys Inc Systeme de controle hors substrat
US11790259B2 (en) 2019-09-06 2023-10-17 D-Wave Systems Inc. Systems and methods for tuning capacitance in quantum devices
US12224750B2 (en) 2021-09-03 2025-02-11 1372934 B.C. Ltd. Topologically protected qubits, processors with topologically protected qubits, and methods for use of topologically protected qubits

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0890113B1 (fr) * 1996-03-26 1999-10-06 Forschungszentrum Jülich Gmbh Dispositif de couplage d'un magnetometre hf a anneau de commutation a un circuit bouchon supraconducteur
RU2184407C1 (ru) * 2000-11-02 2002-06-27 Омский государственный университет Сквид-магнитометр на высокотемпературных пленках
DE10063735C1 (de) * 2000-12-18 2002-04-18 Inst Physikalische Hochtech Ev SQUID-Sensor, beinhaltend zwei in Reihe geschaltete direkt gekoppelte SQUIDs
DE10111619C1 (de) * 2001-03-10 2002-07-11 Forschungszentrum Juelich Gmbh Planares Layout für die Operation eines rf-SQUID-Magnetometers
US8841764B2 (en) * 2012-01-31 2014-09-23 International Business Machines Corporation Superconducting quantum circuit having a resonant cavity thermalized with metal components

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4064029A (en) * 1977-02-08 1977-12-20 The United States Of America As Represented By The United States Energy Research And Development Administration Method of making an improved superconducting quantum interference device
WO1990000742A1 (fr) * 1988-07-11 1990-01-25 UNITED STATES GOVERNMENT, as represented by THE NATIONAL AERONAUTICS AND SPACE ADMINISTRATION OFFICE OF ASSOCIATE GENERAL COUNSEL (INTELLECTUAL PRO PERTY) Squid a couche mince plane a concentrateur de flux integre
DE4319693A1 (de) * 1993-06-16 1994-12-22 Forschungszentrum Juelich Gmbh RF-SQUID mit einem integrierten lambda-Mikrowellenresonator als hochempfindliches Magnetometer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8911237U1 (de) * 1989-09-21 1989-11-02 Kernforschungsanlage Jülich GmbH, 5170 Jülich Sensor zum Messen von magnetischem Fluß

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4064029A (en) * 1977-02-08 1977-12-20 The United States Of America As Represented By The United States Energy Research And Development Administration Method of making an improved superconducting quantum interference device
WO1990000742A1 (fr) * 1988-07-11 1990-01-25 UNITED STATES GOVERNMENT, as represented by THE NATIONAL AERONAUTICS AND SPACE ADMINISTRATION OFFICE OF ASSOCIATE GENERAL COUNSEL (INTELLECTUAL PRO PERTY) Squid a couche mince plane a concentrateur de flux integre
DE4319693A1 (de) * 1993-06-16 1994-12-22 Forschungszentrum Juelich Gmbh RF-SQUID mit einem integrierten lambda-Mikrowellenresonator als hochempfindliches Magnetometer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
TANAKA S ET AL: "Properties of YBa/sub 2/Cu/sub 3/O/sub 7-y/ large washer SQUID", JAPANESE JOURNAL OF APPLIED PHYSICS, PART 2 (LETTERS), 1 MAY 1993, JAPAN, vol. 32, no. 5A, ISSN 0021-4922, pages L662 - L664 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003090161A3 (fr) * 2002-04-15 2005-02-17 Dwave Sys Inc Systeme de controle hors substrat
US6911664B2 (en) 2002-04-15 2005-06-28 D-Wave Systems, Inc. Extra-substrate control system
US7042005B2 (en) 2002-04-15 2006-05-09 D-Wave Systems, Inc. Extra-substrate control system
US11790259B2 (en) 2019-09-06 2023-10-17 D-Wave Systems Inc. Systems and methods for tuning capacitance in quantum devices
US12099901B2 (en) 2019-09-06 2024-09-24 D-Wave Systems Inc. Systems and methods for tuning capacitance in quantum devices
US12224750B2 (en) 2021-09-03 2025-02-11 1372934 B.C. Ltd. Topologically protected qubits, processors with topologically protected qubits, and methods for use of topologically protected qubits

Also Published As

Publication number Publication date
EP0787361A1 (fr) 1997-08-06
DE4436448C1 (de) 1996-02-29
JPH10507314A (ja) 1998-07-14

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