Electronic state of vortices in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">YBa</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Cu</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mi>y</mml:mi></mml:mrow></

Tsuchiya, Yoshishige; Iwaya, Katsuya; Kinoshita, Kentaro; Hanaguri, T.; Kitano, Haruhisa; Maeda, Akiko; Shibata, Kenji; Nishizaki, Terukazu; Kobayashi, Norio

doi:10.1103/physrevb.63.184517

Cited by 79 publications

(77 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2). The temperature dependence and absolute values are in agreement with data on crystals [10]. The factor ≈ 2 between data in SmBCO and YBCO is consistent with the difference in normal state resistivities [7].…”

Section: Fixed Frequency Measurementssupporting

confidence: 77%

“…2. Indeed, the reported values of ν 0 for this class of materials are around 10 GHz at our working temperatures [10], so that at our measuring frequency ν = 48.2 GHz, ν 0 /ν ≈ 0.2. In the case of SmBCO a clear downward curvature in ρ 1 is present at all temperatures, indicating the presence of lines of nodes in the gap and a relevant role of the quasiparticle contribution even far from T c .…”

Section: Fixed Frequency Measurementsmentioning

confidence: 99%

See 1 more Smart Citation

Vortex Motion and Quasiparticle Resistivity in Superconductors at Microwave Frequencies

et al. 2007

View full text Add to dashboard Cite

At nonzero frequencies both the normal and superfluid fractions, as well as moving vortices, contribute to the electrical transport, resulting in intricate expressions for the resistivity. We present an extended study of microwave resistivity data measured on YBa 2 Cu 3 O 7−δ , SmBa 2 Cu 3 O 7−δ , and MgB2 by means of a broad-band technique between 2 and 20 GHz and of a resonant system at 50 GHz. We discuss the main experimental fingerprints that allow one to identify the relevance of the different contributions from the measured microwave response as a function of frequency, temperature, and magnetic field. We show that the field-dependent superfluid/quasiparticles dynamics cannot be in general neglected with respect to the vortex motion, albeit its relative importance is different in different materials: in high temperature superconductors vortex motion prevails at high fields, but at low fields a significant superfluid/quasiparticle contribution exists (ascribed to the presence of lines of nodes). In MgB 2 the two contributions are comparable even at high fields. In this general frame, we derive from the measurements vortex and superfluid parameters in agreement with theoretical predictions and independent measurements.

show abstract

Section: Fixed Frequency Measurementssupporting

confidence: 77%

Section: Fixed Frequency Measurementsmentioning

confidence: 99%

Vortex Motion and Quasiparticle Resistivity in Superconductors at Microwave Frequencies

et al. 2007

View full text Add to dashboard Cite

show abstract

“…We have also shown that DyBCO monodomains in some case can exhibit simultaneous microscale inhomogeneity, leading to weak-links, and possible nanoscale inhomogeneity, leading to a small scattering time as revealed by smaller viscosity. DyBCO single domain (sample A1), full dots; YBCO/BZO thin film [10], open circles; YBCO single crystal [9], squares. The continuous line is the estimated value for DyBCO sample B1.…”

Section: Discussionmentioning

confidence: 99%

“…A very few studies of DyBCO at microwaves in the mixed state exist [8], while the parent compound YBa 2 Cu 3 O 7−δ (YBCO) is widely studied. It will demonstrate particularly useful a comparison between data taken in DyBCO monodomains, in YBCO single crystals [9] and in YBCO epitaxial thin films with artificially enhanced pinning [10], as prototypical case for intrinsic and extrinsic behaviour, respectively.…”

Section: Introductionmentioning

confidence: 99%

Microwave properties of DyBCO monodomain in the mixed state and comparison with other RE-BCO systems

Pompeo

Rogai

Ausloos

et al. 2011

Physica C: Superconductivity and its Applications

View full text Add to dashboard Cite

show abstract

“…[14,15] The flux flow resistivities of YBa 2 Cu 3 O 7−δ and Bi 2 Sr 2 CaCu 2 O 8+δ in the underdoped and optimally doped regimes have been measured by several groups but here again there are several difficulties in interpreting them. [17,18,19,20,21,22] For instance, the measurements could not cover a wide field range in the vortex state due to extremely large upper critical field H c2 . Moreover, very recent STM measurements have demonstrated that the vortex core structure of these high-T c cuprates is very different from that expected in the semiclassical d-wave superconductor [24,25], possibly due to the extremely short coherence lengths and the strong antiferromagnetic fluctuation effect within the core.…”

Section: Introductionmentioning

confidence: 99%

Free flux flow resistivity in a strongly overdoped high-Tccuprate: The purely viscous motion of the vortices in a semiclassicald-wave superconductor

et al. 2002

View full text Add to dashboard Cite

Free flux flow resistivity in strongly overdoped high-T c cuprate; purely viscous motion of the vortices in semiclassical d-wave superconductor We report the free flux flow (FFF) resistivity associated with a purely viscous motion of the vortices in moderately clean d-wave superconductor Bi:2201 in the strongly overdoped regime (Tc=16 K) for a wide range of the magnetic field in the vortex state. The FFF resistivity is obtained by measuring the microwave surface impedance at different microwave frequencies. It is found that the FFF resistivity is remarkably different from that of conventional s-wave superconductors. At low fields (H < 0.2Hc2) the FFF resistivity increases linearly with H with a coefficient which is far larger than that found in conventional s-wave superconductors. At higher fields, the FFF resistivity increases in proportion to √ H up to Hc2. Based on these results, the energy dissipation mechanism associated with the viscous vortex motion in "semiclassical" d-wave superconductors with gap nodes is discussed. Two possible scenarios are put forth for these field dependence; the enhancement of the quasiparticle relaxation rate and the reduction of the number of the quasiparticles participating the energy dissipation in d-wave vortex state.

show abstract

Electronic state of vortices inYBa2Cu3Oy

Cited by 79 publications

References 42 publications

Vortex Motion and Quasiparticle Resistivity in Superconductors at Microwave Frequencies

Vortex Motion and Quasiparticle Resistivity in Superconductors at Microwave Frequencies

Microwave properties of DyBCO monodomain in the mixed state and comparison with other RE-BCO systems

Free flux flow resistivity in a strongly overdoped high-Tccuprate: The purely viscous motion of the vortices in a semiclassicald-wave superconductor

Contact Info

Product

Resources

About