Switching and Hysteresis on the I-V Curves of Submicron BSCCO (2212) Bridges

Зыбцев, С. Г.; Pokrovskiǐ, V. Ya.; Gorlova, I. G.; Latyshev, Yu. I.; Лучинин, В. В.; Savenko, Alexey

doi:10.1007/s10909-005-3931-2

Cited by 9 publications

(12 citation statements)

References 14 publications

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“…Another important effect was observed recently on the CVC of submicron BSCCO bridges [18]. When the temperature of the bridge is reduced bellow T c , characteristic steps on the CVC appear with clearly observed hysteresis.…”

Section: Of Ref[17])mentioning

confidence: 60%

“…The average frequency of the switching is very strong function of temperature: decreasing of temperature by 1 K leads to the decrease of the frequency of switching by several orders of magnitude. Therefore the activation energy that corresponds to the switching is more then 10 4 K [18], indicating the macroscopic nature of the barrier between metastable states.…”

Section: Of Ref[17])mentioning

confidence: 99%

“…The measurement of the voltage as a function of time at high temperatures and at the fixed current has demonstrated sharp switching between two metastable states. The voltage randomly jumps between two values (random telegraph noise) [18]. The average frequency of the switching is very strong function of temperature: decreasing of temperature by 1 K leads to the decrease of the frequency of switching by several orders of magnitude.…”

Section: Of Ref[17])mentioning

confidence: 99%

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Current-voltage characteristic of narrow superconducting wires: Bifurcation phenomena

2011

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The current-voltage characteristics of long and narrow superconducting channels are investigated using the time-dependent Ginzburg-Landau equations for complex order parameter. We found out that the steps in the current voltage characteristic can be associated with bifurcations of either steady state or oscillatory solution. We revealed typical instabilities which induced the singularities in current-voltage characteristics, and analytically estimated period of oscillations and average voltage in the vicinity of the critical currents. Our results show that these bifurcations can substantially complicate dynamics of the order parameter and eventually lead to appearance of such phenomena as multistability and chaos. The discussed bifurcation phenomena sheds a light on some recent experimental findings.

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Section: Of Ref[17])mentioning

confidence: 60%

Section: Of Ref[17])mentioning

confidence: 99%

Section: Of Ref[17])mentioning

confidence: 99%

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Current-voltage characteristic of narrow superconducting wires: Bifurcation phenomena

2011

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“…2), etched on the same crystal). The time-domain studies have shown, that at high temperatures T> 60 K at a fixed current the voltage shows sharp switchings between two metastable states of the random telegraph signal type [9]. A typical view of the signal is shown in the inset to fig.…”

Section: Stepped I-v Curvesmentioning

confidence: 97%

“…The telegraph signal is characterized by an average period τ or average frequency of switchings f = 1/τ. The temperature dependence τ(T) can be very abrupt: decreasing temperature by 1 K increases τ by several orders of magnitude, which corresponds to activation energies > 10 4 K [9]. At lower temperature the switchings disappear and the hysteresis develops at a back sweeping of V(I).…”

Section: Stepped I-v Curvesmentioning

confidence: 99%

Instabilities in the current-voltage characteristics of submicron BSCCO bridges

Зыбцев

Pokrovskiǐ

Gorlova

et al. 2006

J. Phys.: Conf. Ser.

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Abstract. The influence of magnetic field and microwave irradiation on dynamical phase separation in submicron Bi 2 Sr 2 CaCu 2 O 8+x bridges has been studied. Strong effect on the shape and metastable character of the step-like I-V characteristics are found. Under a weak field H < 2 Oe and low level microwave irradiation the step-like structure of the I-V characteristics smears out and disappears completely. The average frequency of switching between metastable states grows by 5 orders under increase of magnetic field by only 1 Oe. This behavior is explained in terms of the model of dynamical vortex lines.

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Encapsulating High‐Temperature Superconducting Twisted van der Waals Heterostructures Blocks Detrimental Effects of Disorder

et al. 2023

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High‐temperature cuprate superconductors based van der Waals (vdW) heterostructures hold high technological promise. One of the obstacles hindering their progress is the detrimental effect of disorder on the properties of the vdW‐devices‐based Josephson junctions (JJs). Here, a new method of fabricating twisted vdW heterostructures made of Bi2Sr2CuCa2O8+δ, crucially improving the JJ characteristics and pushing them up to those of the intrinsic JJs in bulk samples, is reported. The method combines cryogenic stacking using a solvent‐free stencil mask technique and covering the interface by insulating hexagonal boron nitride crystals. Despite the high‐vacuum condition down to 10−6 mbar in the evaporation chamber, the interface appears to be protected from water molecules during the in situ metal deposition only when fully encapsulated. Comparing the current–voltage curves of encapsulated and unencapsulated interfaces, it is revealed that the encapsulated interfaces’ characteristics are crucially improved, so that the corresponding JJs demonstrate high critical currents and sharpness of the superconducting transition comparable to those of the intrinsic JJs. Finally, it is shown that the encapsulated heterostructures are more stable over time.

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Switching and Hysteresis on the I-V Curves of Submicron BSCCO (2212) Bridges

Cited by 9 publications

References 14 publications

Current-voltage characteristic of narrow superconducting wires: Bifurcation phenomena

Current-voltage characteristic of narrow superconducting wires: Bifurcation phenomena

Instabilities in the current-voltage characteristics of submicron BSCCO bridges

Encapsulating High‐Temperature Superconducting Twisted van der Waals Heterostructures Blocks Detrimental Effects of Disorder

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