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7 papers · 2 filters
Pairing in cuprates from high energy electronic states
A. F. Santander-Syro, R. P. S. M. Lobo, N. Bontemps +3
The in-plane optical conductivity of Bi2Sr2CaCu2O8+d thin films with small carrier density (underdoped) up to large carrier density (overdoped) is analyzed with unprecedented accur…
Entropy of vortex cores on the border of the superconductor-to-insulator transition in an underdoped cuprate
C. Capan, K. Behnia, J. Hinderer +5
We present a study of Nernst effect in underdoped in magnetic fields as high as 28T. At high fields, a sizeable Nernst signal was found to persist in presence o…
Evidence for two distinct energy scales in the Raman spectra of YBa2(CuNi)O6.95
Y. Gallais, A. Sacuto, P. Bourges +3
We report low energy electronic Raman scattering from Ni-substituted YBa2Cu3O6.95 single crystals with Tc ranging from 92.5 K to 78 K. The fully symmetrical A1g channel and the B1g…
Absence of a pseudogap in the in-plane infrared response of Bi2Sr2CaCu2O(8+d)
A. F. Santander-Syro, R. P. S. M. Lobo, N. Bontemps +3
The ab-plane reflectance of Bi2Sr2CaCu2O(8+d) thin films was measured in the 30-25000 cm^(-1) range for one underdoped (Tc = 70 K), and one overdoped sample (Tc = 63 K) as a functi…
Localization by disorder in the infrared conductivity of (Y,Pr)Ba2Cu3O7 films
R. P. S. M. Lobo, E. Ya. Sherman, D. Racah +2
The ab-plane reflectivity of (Y{1-x}Prx)Ba2Cu3O7 thin films was measured in the 30-30000 cm-1 range for samples with x = 0 (Tc = 90 K), x = 0.4 (Tc = 35 K) and x = 0.5 (Tc = 19 K)…
Two Gap State Density in MgB: A True Bulk Property or A Proximity Effect?
F. Giubileo, D. Roditchev, W. Sacks +7
We report on the temperature dependence of the quasiparticle density of states (DOS) in the simple binary compound MgB2 directly measured using scanning tunneling microscope (STM).…