English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The effect of electron irradiation with the energy of 2.5 MeV on thetemperature dependences of the resistivity of an optimally doped$YBa_2Cu_3O_{7-\delta}$ single crystal has been studied. The temperaturedependences of both fluctuation conductivity $\sigma^\prime(T)$ and thepseudogap $\Delta^*(T)$ on irradiation dose $\phi$ have been calculated withinthe local pair model. Here we show that with an increase in $\phi$, the valueof $\rho(300 K)$ increases linearly, while $T_c$ decreases linearly.Concurrently, the value of $\rho{100 K}$ increases nonlinearly, demonstrating afeature for $\phi_3$ = 4.3 10$^{18}$ e/$cm^2$, which is also observed in thenumber of other dose-dependent parameters.Regardless of the irradiation dose,in the temperature range from $T_c$ up to $T_{01}$, $\sigma^\prime(T)$ obeysthe classical fluctuation theories of Aslamazov$-$Larkin and Maki$-$Thompson,demonstrating 3D$-$2D crossover with increasing temperature. The crossovertemperature $T_0$ makes it possible to determine the coherence length along the$c$-axis, $\xi_c(T)$, which increases by $\approx 3$ times under irradiation.Furthermore, the range of superconducting fluctuations above $T_c$ alsonoticeably increases.At $\phi$ = 0, the dependence $\Delta^*(T)$ typical forsingle crystals containing pronounced twin boundaries is observed with amaximum at $T_{pair}$ ~ 120 K and a distinct minimum at $T = T_{01}$. It wasdetermined for the first time that at $\phi_3$ = 4.3 10$^{18}$ the shape of$\Delta^*(T)$ changes strongly and becomes the same as in optimally doped$YBa_2Cu_3O_{7-\delta}$ single crystals with a very low pseudogap openingtemperature $T^*$ and noticeably reduced $T_{pair}$, while at $T_c(\phi)$ thereare no singularities.

Influence of electron irradiation on fluctuation conductivity and pseudogap in $YBa_2Cu_3O_{7-\delta}$ single crystals