Influence of electron irradiation on fluctuation conductivity and pseudogap in $YB{a}_{2}C{u}_3{O}_{7-\delta }$ single crystals

Abstract

The effect of electron irradiation with the energy of 2.5 MeV on the temperature dependences of the resistivity of an optimally doped $YB{a}_{2}C{u}_3{O}_{7-\delta }$ single crystal has been studied. The temperature dependences of both fluctuation conductivity ${\sigma }^{\prime }(T)$ and the pseudogap ${\Delta }^{\ast }(T)$ on irradiation dose $\varphi$ have been calculated within the local pair model. Here we show that with an increase in $\varphi$, the value of $\rho (300K)$ increases linearly, while $T_c$ decreases linearly. Concurrently, the value of $\rho 100K$ increases nonlinearly, demonstrating a feature for ${\varphi }_3$ = 4.3 10${}^{18}$ e/$c{m}^2$, which is also observed in the number of other dose-dependent parameters.Regardless of the irradiation dose, in the temperature range from $T_c$ up to $T_{01}$, ${\sigma }^{\prime }(T)$ obeys the classical fluctuation theories of Aslamazov$-$Larkin and Maki$-$Thompson, demonstrating 3D$-$2D crossover with increasing temperature. The crossover temperature $T_0$ 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 $T_c$ also noticeably increases.At $\varphi$ = 0, the dependence ${\Delta }^{\ast }(T)$ typical for single crystals containing pronounced twin boundaries is observed with a maximum at $T_{pair}$ ~ 120 K and a distinct minimum at $T=T_{01}$. It was determined for the first time that at ${\varphi }_3$ = 4.3 10${}^{18}$ the shape of ${\Delta }^{\ast }(T)$ changes strongly and becomes the same as in optimally doped $YB{a}_{2}C{u}_3{O}_{7-\delta }$ single crystals with a very low pseudogap opening temperature $T^{\ast }$ and noticeably reduced $T_{pair}$, while at $T_c(\varphi )$ there are no singularities.

arXiv comment16 pages, 10 figures, 3 table

References in corpus (32)

• The pseudogap in high-temperature superconductors: an experimental survey
• Vanishing of phase coherence in underdoped Bi_2Sr_2CaCu_2O_8+d
• Change of carrier density at the pseudogap critical point of a cuprate superconductor
• Electronic Phase Diagram of High-T_c Cuprate Superconductors from a Mapping of the In-Plane Resistivity Curvature
• Scattering and Pairing in Cuprate Superconductors
• Phase Fluctuations and Pseudogap Phenomena
• A Theory of the Longitudinal and Hall Conductivities of the Cuprate Superconductors
• Pseudogap in a thin film of a conventional superconductor
• Pseudogap from ARPES experiment: three gaps in cuprates and topological superconductivity
• Giant superconducting fluctuations in the compensated semimetal FeSe at the BCS-BEC crossover
• Re-entrant charge order in overdoped (Bi,Pb)${}_{2.12}$Sr${}_{1.88}$CuO${}_{6+\delta }$ outside the pseudogap regime
• Respective influences of pair breaking and phase fluctuations in disordered high Tc superconductors
• High Field Studies of Superconducting Fluctuations in High-T_c Cuprates: Evidence for a Small Gap distinct from the Large Pseudogap
• Conductivity of underdoped YBa2Cu3O7-d : evidence for incoherent pair correlations in the pseudogap regime
• Collapse of the Fermi surface and fingerprints of order in the pseudogap state of cuprate superconductors
• Temperature range of superconducting fluctuations above T_c in YBa_2Cu_3O_{7-δ} single crystals
• Specific temperature dependence of pseudogap in YBa${}_2$Cu${}_3$O${}_{7-\delta }$ nanolayers
• Effect of electron irradiation on superconductivity in single crystals of Ba(Fe${}_{1-x}$Ru${}_x$)${}_2$As${}_2$ ($x=$0.24)
• Collective energy gap of preformed Cooper-pairs in disordered superconductors
• Effect of the pseudogap on T${}_c$ in the cuprates and implications for its origin
• Anomalies in the pseudogap phase of the cuprates: Competing ground states and the role of umklapp scattering
• The Cuprate Pseudogap: Competing Order Parameters or Precursor Superconductivity
• Pressure Studies on a High-$T_c$ Superconductor Pseudogap and Critical Temperatures
• Superconducting Fluctuations, Pseudogap and Phase Diagram in Cuprates
• Fractionalized pair density wave in the pseudo-gap phase of cuprate superconductors
• Peculiarities in the pseudogap behavior in optimally doped YBa2Cu3O7-δ single crystals under pressure up to 1GPa
• Local origin of the pseudogap in the attractive Hubbard model
• Linking the pseudo-gap in the cuprates with local symmetry breaking: a commentary
• Influence of disorder on the signature of pseudogap and multigap superconducting behavior in FeSe
• Effect of electron irradiation and Pr doping on the charge transport in YBCO single crystals
• Investigation of Precursor Superconducting State in YBa${}_2$Cu${}_3$O${}_{7-\delta }$ through In-plane Optical Spectroscopy
• Fluctuating Cooper pairs in FeSe at temperatures exceeding double Tc

Cited by in corpus (2)

• Influence of strong electron irradiation on fluctuation conductivity and pseudogap in YBa${}_2$Cu${}_3$O${}_7$--$\delta$ single crystals
• Evolution of the pseudogap and excess conductivity of YBa${}_2$Cu${}_3$O${}_{7-\delta }$ single crystals in the course of long-term aging