Free-carrier relaxation dynamics in the normal state of sinteredYBa2Cu3

Far-infrared reflectivity of sintered YBa2Cu3O7 in the normal and superconducting state

“…3). The reason for this discrepancy is not known; a similar discrepancy between dynamical and d.c. resistance has also been reported earlier [19]. The imaginary part, a2, of the dynamical conductivity (Fig.…”

“…For sintered La-Sr-Cu--O compounds energy gaps (for T<TJ of 2A/kT~"3.5 [4][5][6][7][8][9][10][11] and for sintered YBa2Cu307 values between 2.3 and 3.5 have been reported [12][13][14][15][16][17][18][19][20][21][22]. From a recent reflectivity study of single crystal platelets on a copper surface Schlesinger In this paper we report far-infrared reflection measurements for a sintered YBazCu30 7 sample that contained a large amount of preferentially oriented crystallites with the a-b plane almost parallel to the sample surface and that showed extraordinary high far-infrared reflectivity.…”

Effect of oxygen deficiencies and the substitution of fluorine on the electronic states in YBa2Cu3O7−δ superconductors

“…Our objective is to examine these properties with a view to elucidating them using an accurate ab initio or first-principles technique, together with a comparison of the present study with existent measurements [9] and other theoretical calculations [8,10]. This comparison will provide a guideline for the use of methods in the cases for which similarly detailed analysis is impossible.…”

Far Infrared Measurements on Single Crystals, Films and Bulk Sintered High Temperature Superconductors

“…Encouraged by the results for Lal.8 5 Sro.15CuO 4 -y, we have pursued a similar analysis for the YBa 2 Cu 3 0 7 -y data [5].…”