Depairing current density of infinite-layer Sr1−xLaxCuO2 superconducting films

Liang, Manlai; Kunchur, Milind N.; Fruchter, L.; Li, Z.Z.

doi:10.1016/j.physc.2013.06.015

Cited by 10 publications

(10 citation statements)

References 14 publications

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“…The corresponding zero-T Pearl screening length 16 is Λ(0) = 2λ 2 /d = 4.4 µm. As emphasized in our earlier work 5,17 , the combination of B c2 and j d provides a useful method for obtaining a single-band λ purely from transport measurements, which directly gives an absolute value of λ(0) and is unaffected by magnetism in the material.…”

Section: 92 (Where Rn Is the Normal-state Resistance) (B) The Same mentioning

confidence: 99%

Current-induced depairing in theBi2Te3/FeTeinterfacial superconductor

et al. 2015

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Section: 92 (Where Rn Is the Normal-state Resistance) (B) The Same mentioning

confidence: 99%

Current-induced depairing in theBi2Te3/FeTeinterfacial superconductor

et al. 2015

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“…A more interesting application of this technique for elucidating a variable ρ(T ) is described in a later section. Figure 5a represents a set of pulsed constant-current R(T ) curves in zero magnetic field [38]. As the current is increased, the transition is progressively pushed down in temperature.…”

Section: Figmentioning

confidence: 99%

“…We describe below how the currentinduced depairing approach was used to answer these questions to elucidate the nature of the normal state in the Bi 2 Te 3 /FeTe system. [38]).…”

Section: Investigations In a Topological Insulator/chalcogenide Intermentioning

confidence: 99%

“…The inset shows a magnified view of the midpoint region. (b) Left axis (circle symbols): two-thirds power of the depairing current versus the midpoint transition temperature corresponding to the depairing law.Right axis (plus symbols): square of the depairing current versus the midpoint transition temperature corresponding to Joule heating (adapted from reference[38]).…”

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confidence: 99%

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Evaluating Superconductors through Current Induced Depairing

Kunchur

2019

Condensed Matter

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The phenomenon of superconductivity occurs in the phase space of three principal parameters: temperature T, magnetic field B, and current density j. The critical temperature Tc is one of the first parameters that is measured and in a certain way defines the superconductor. From the practical applications point of view, of equal importance is the upper critical magnetic field Bc2 and conventional critical current density jc (above which the system begins to show resistance without entering the normal state). However, a seldom-measured parameter, the depairing current density j d , holds the same fundamental importance as Tc and Bc2, in that it defines a boundary between the superconducting and normal states. A study of j d sheds unique light on other important characteristics of the superconducting state such as the superfluid density and the nature of the normal state below Tc, information that can play a key role in better understanding newly-discovered superconducting materials. From a measurement perspective, the extremely high values of j d make it difficult to measure, which is the reason why it is seldom measured. Here, we will review the fundamentals of current-induced depairing and the fast-pulsed current technique that facilitates its measurement and discuss the results of its application to the topological-insulator/chalcogenide interfacial superconducting system.

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“…To solve this problem, micro-fabrication technique is used to reduce the size of the crystal to micrometer or sub-micrometer scale. [19][20][21][22][23][24][25][26][27][28][29]. Until now, studies on the depairing J c have been mainly performed on low-T c superconductors, especially at low temperatures [19-22, 24, 25, 30].…”

Section: Introductionmentioning

confidence: 99%

Achieving the depairing limit along the c axis in Fe1+yTe1−xSe
Sun
¹
,
Ohnuma
²
,
Ayukawa
³

et al. 2020
Phys. Rev. B
17
0
11
0
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We report the achieving of depairing current limit along c-axis in Fe1+yTe1−xSex single crystals. A series of crystals with Tc ranging from 8.6 K to 13.7 K (different amount of excess Fe, y) were fabricated into c-axis bridges with a square-micrometer cross-section. The critical current density, Jc, was directly estimated from the transport current-voltage measurements. The transport Jc reaches a very large value, which is about one order of magnitude larger than the depinning Jc, but comparable to the calculated depairing Jc ∼ 2 × 10 6 A/cm 2 at 0 K, based on the Ginzburg-Landau (GL) theory. The temperature dependence of the depairing Jc follows the GL-theory (∝ (1-T /Tc) 3/2 ) down to ∼ 0.83 Tc, then increases with a reduced slope at low temperatures, which can be qualitatively described by the Kupriyanov-Lukichev theory. Our study provides a new route to understand the behavior of depairing Jc in iron-based superconductors in a wide temperature range. * sunyue@phys.aoyama.ac.jp † hkitano@phys.aoyama.ac.jp

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Depairing current density of infinite-layer Sr1−xLaxCuO2 superconducting films

Cited by 10 publications

References 14 publications

Current-induced depairing in theBi2Te3/FeTeinterfacial superconductor

Current-induced depairing in theBi2Te3/FeTeinterfacial superconductor

Evaluating Superconductors through Current Induced Depairing

Achieving the depairing limit along the c axis in Fe1+yTe1−xSe
Sun
¹
,
Ohnuma
²
,
Ayukawa
³

et al. 2020
Phys. Rev. B
17
0
11
0
View full text Add to dashboard Cite

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Depairing current density of infinite-layer Sr1−xLaxCuO2 superconducting films

Cited by 10 publications

References 14 publications

Current-induced depairing in theBi2Te3/FeTeinterfacial superconductor

Current-induced depairing in theBi2Te3/FeTeinterfacial superconductor

Evaluating Superconductors through Current Induced Depairing

Achieving the depairing limit along the c axis in Fe1+yTe1−xSeSun1, Ohnuma2, Ayukawa3 et al. 2020Phys. Rev. B170110View full textAdd to dashboardCite

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Achieving the depairing limit along the c axis in Fe1+yTe1−xSe
Sun
¹
,
Ohnuma
²
,
Ayukawa
³

et al. 2020
Phys. Rev. B
17
0
11
0
View full text Add to dashboard Cite