Microwave response of vortices in superconducting thin films of Re and Al

C. Song, T. W. Heitmann, M. P. Defeo, K. Yu, R. McDermott, M. Neeley, John M. Martinis, Britton Plourde

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

Vortices in superconductors driven at microwave frequencies exhibit a response related to the interplay between the vortex viscosity, pinning strength, and flux creep effects. At the same time, the trapping of vortices in superconducting microwave resonant circuits contributes excess loss and can result in substantial reductions in the quality factor. Thus, understanding the microwave vortex response in superconducting thin films is important for the design of such circuits, including superconducting qubits and photon detectors, which are typically operated in small, but nonzero, magnetic fields. By cooling in fields on the order of 100 μT and below, we have characterized the magnetic field and frequency dependence of the microwave response of a small density of vortices in resonators fabricated from thin films of Re and Al, which are common materials used in superconducting microwave circuits. Above a certain threshold cooling field, which is different for the Re and Al films, vortices become trapped in the resonators. Vortices in the Al resonators contribute greater loss and are influenced more strongly by flux creep effects than in the Re resonators. This different behavior can be described in the framework of a general vortex dynamics model.

Original languageEnglish (US)
Article number174512
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume79
Issue number17
DOIs
StatePublished - May 1 2009

Fingerprint

Superconducting films
Vortex flow
Microwaves
vortices
microwaves
thin films
resonators
Resonators
Microwave circuits
trapped vortices
Creep
cooling
Magnetic fields
Fluxes
Cooling
microwave circuits
Resonant circuits
microwave frequencies
magnetic fields
Microwave frequencies

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Microwave response of vortices in superconducting thin films of Re and Al. / Song, C.; Heitmann, T. W.; Defeo, M. P.; Yu, K.; McDermott, R.; Neeley, M.; Martinis, John M.; Plourde, Britton.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 79, No. 17, 174512, 01.05.2009.

Research output: Contribution to journalArticle

Song, C. ; Heitmann, T. W. ; Defeo, M. P. ; Yu, K. ; McDermott, R. ; Neeley, M. ; Martinis, John M. ; Plourde, Britton. / Microwave response of vortices in superconducting thin films of Re and Al. In: Physical Review B - Condensed Matter and Materials Physics. 2009 ; Vol. 79, No. 17.
@article{43ee15ac82784144aa0593740e5844e9,
title = "Microwave response of vortices in superconducting thin films of Re and Al",
abstract = "Vortices in superconductors driven at microwave frequencies exhibit a response related to the interplay between the vortex viscosity, pinning strength, and flux creep effects. At the same time, the trapping of vortices in superconducting microwave resonant circuits contributes excess loss and can result in substantial reductions in the quality factor. Thus, understanding the microwave vortex response in superconducting thin films is important for the design of such circuits, including superconducting qubits and photon detectors, which are typically operated in small, but nonzero, magnetic fields. By cooling in fields on the order of 100 μT and below, we have characterized the magnetic field and frequency dependence of the microwave response of a small density of vortices in resonators fabricated from thin films of Re and Al, which are common materials used in superconducting microwave circuits. Above a certain threshold cooling field, which is different for the Re and Al films, vortices become trapped in the resonators. Vortices in the Al resonators contribute greater loss and are influenced more strongly by flux creep effects than in the Re resonators. This different behavior can be described in the framework of a general vortex dynamics model.",
author = "C. Song and Heitmann, {T. W.} and Defeo, {M. P.} and K. Yu and R. McDermott and M. Neeley and Martinis, {John M.} and Britton Plourde",
year = "2009",
month = "5",
day = "1",
doi = "10.1103/PhysRevB.79.174512",
language = "English (US)",
volume = "79",
journal = "Physical Review B-Condensed Matter",
issn = "0163-1829",
publisher = "American Institute of Physics Publising LLC",
number = "17",

}

TY - JOUR

T1 - Microwave response of vortices in superconducting thin films of Re and Al

AU - Song, C.

AU - Heitmann, T. W.

AU - Defeo, M. P.

AU - Yu, K.

AU - McDermott, R.

AU - Neeley, M.

AU - Martinis, John M.

AU - Plourde, Britton

PY - 2009/5/1

Y1 - 2009/5/1

N2 - Vortices in superconductors driven at microwave frequencies exhibit a response related to the interplay between the vortex viscosity, pinning strength, and flux creep effects. At the same time, the trapping of vortices in superconducting microwave resonant circuits contributes excess loss and can result in substantial reductions in the quality factor. Thus, understanding the microwave vortex response in superconducting thin films is important for the design of such circuits, including superconducting qubits and photon detectors, which are typically operated in small, but nonzero, magnetic fields. By cooling in fields on the order of 100 μT and below, we have characterized the magnetic field and frequency dependence of the microwave response of a small density of vortices in resonators fabricated from thin films of Re and Al, which are common materials used in superconducting microwave circuits. Above a certain threshold cooling field, which is different for the Re and Al films, vortices become trapped in the resonators. Vortices in the Al resonators contribute greater loss and are influenced more strongly by flux creep effects than in the Re resonators. This different behavior can be described in the framework of a general vortex dynamics model.

AB - Vortices in superconductors driven at microwave frequencies exhibit a response related to the interplay between the vortex viscosity, pinning strength, and flux creep effects. At the same time, the trapping of vortices in superconducting microwave resonant circuits contributes excess loss and can result in substantial reductions in the quality factor. Thus, understanding the microwave vortex response in superconducting thin films is important for the design of such circuits, including superconducting qubits and photon detectors, which are typically operated in small, but nonzero, magnetic fields. By cooling in fields on the order of 100 μT and below, we have characterized the magnetic field and frequency dependence of the microwave response of a small density of vortices in resonators fabricated from thin films of Re and Al, which are common materials used in superconducting microwave circuits. Above a certain threshold cooling field, which is different for the Re and Al films, vortices become trapped in the resonators. Vortices in the Al resonators contribute greater loss and are influenced more strongly by flux creep effects than in the Re resonators. This different behavior can be described in the framework of a general vortex dynamics model.

UR - http://www.scopus.com/inward/record.url?scp=66749105238&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=66749105238&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.79.174512

DO - 10.1103/PhysRevB.79.174512

M3 - Article

VL - 79

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 0163-1829

IS - 17

M1 - 174512

ER -