Effect of hole doping on the London penetration depth inBi2.15Sr1.85CaCu2O8

Doping dependence of the electron–phonon and electron–spin fluctuation interactions in the high-Tcsuperconductor Bi2Sr2CaCu2O8+δ

“…Its subsequent decrease between 0.11 and 0.13 (∼1/8) doping, increase away beyond p ∼ 1/8, may be due to the presence of stripe order at this doping level [35]. The concurrent decrease of λ e−sf in this same 'stripe' region implies a suppression in the superconductivity, consistent with a plateau in the superfluid density near this 1/8 doping [36]. The doping dependence of λ e−ph in the OPT-OD region-maximum at OPT, and decrease with overdoping, is also in qualitative agreement with BCS theory, and strong lattice renormalization effects [2,37].…”

Tunable terahertz emission from Bi2Sr2CaCu2OBenseman1, Koshelev2, Kwok3 et al. 2011Phys. Rev. B1063520View full textAdd to dashboardCite

“…However, choosing the center of the emission feature as indicated in Fig. 3 yields a change in frequency by ~8.5 % between 20 K and 40 K. The temperature dependence of λ ab has been determined from microwave cavity measurements for optimally doped BSCCO [27] and from ac-susceptibility measurements on powder samples with various doping levels [28]. We also notice that the emission peak amplitude varies quasi-periodically as a function of voltage, or indeed of frequency as is plotted in Fig.…”

Effects of Zn on the grain boundary properties of La2−xSrxCu1−yZnyO4 superconductors

“…In comparison to the sintered one, the ACS signal from the powdered compound is drastically reduced due to the absence of the intergrain shielding current. The gradual T-dependence of the ACS signal for powders is due to the decrease in the magnetic flux penetration depth as temperature is lowered below T c [13]. We have also shown the field dependent ACS data for the same powdered compound in Fig …”