8 papers · 1 filter
Effect of hole doping on the London penetration depth of Bi:2212 and Bi(Y):2212
W. Anukool, S. Barakat, C. Panagopoulos +1
We report measurements of AC susceptibility and hence the in-plane London penetration depth on the same samples of Bi:2212 and Bi(Y):2212 for many values of the planar hole concent…
Micro-Raman evidence for topological charge order across the superconducting dome of La_{2-x)SrxCuO4
D. Lampakis, E. Liarokapis, C. Panagopoulos
The doping dependence of the micro-Raman spectra of high quality La_{2-x}Sr_xCuO_4 microcrystals with x=0.0-0.45 has been investigated in the region 10-300 K. The phonon at ~100 cm…
Thermo-magnetic hysteretic properties resembling superconductivity in the normal state of La1.85Sr0.15CuO4
M. Majoros, C. Panagopoulos, T. Nishizaki +1
We have performed detailed magnetic and thermal hysteresis experiments in the normal-state magnetization of La1.85Sr0.15CuO4 single crystal. Using a combination of in-field and in-…
Magnetic order in the normal state of the archetypal high-Tc superconductor La2-xSrxCuO4
C. Panagopoulos, M. Majoros, T. Nishizaki +1
We report detailed bulk magnetization measurements of the normal state in the high transition temperature (high-Tc) superconductor La2-xSrxCuO4. A magnetic order in the form of hys…
Superfluid response in monolayer high-Tc cuprates
C. Panagopoulos, T. Xiang, W. Anakool +3
We have studied the doping dependence of the in-plane and out-of-plane superfluid density, ρ^s(0), of two monolayer high-Tc superconductors, HgBa_2CuO_{4+δ} and La_{2-x}Sr_xCuO_4,…
The superfluid density in cuprate high-Tc superconductors - a new paradigm
J. L. Tallon, J. W. Loram, J. R. Cooper +2
The doping dependence of the superfluid density, r_s, of high-Tc superconductors is usually considered in the context of the Uemura relation, namely Tc proportional to rs, which is…