Zobrazeno 1 - 10
of 67
pro vyhledávání: '"Kelley, R. J."'
Autor:
Gatt, R., Christensen, S., Frazer, B., Hirai, Y., Schmauder, T., Kelley, R. J., Onellion, M., Vobornik, I., Perfetti, L., Margaritondo, G., Morawski, A., Lada, T., Paszewin, A., Kendziora, C.
We have used angular resolved photoemission to measure the angular dependence of the superconducting gap in highly overdoped Bi2212 (Tc=65K). While the node at 45 degrees is conserved, we find substantial deviation from a first order d-wave dependenc
Externí odkaz:
http://arxiv.org/abs/cond-mat/9906070
We performed angle-resolved photoemission experiments on overdoped single crystal $Bi_2Sr_2CaCu_2O_{8+x}$ samples with Tc values as low as 55K and very narrow transitions as measured by AC susceptibility. The photoemission data indicate the presence
Externí odkaz:
http://arxiv.org/abs/cond-mat/9512132
Substitution of rare-earth ions for Ca in Bi2Sr2CaCu2O8+y is known to cause a metal-insulator transition. Using resonant photoemission we study how this chemical substitution affects the electronic structure of the material. For the partial Cu-densit
Externí odkaz:
http://arxiv.org/abs/cond-mat/9503164
Autor:
Ma, Jian, Alméras, P., Kelley, R. J., Berger, H., Margaritondo, G., Cai, X. Y., Feng, Y., Larbalestier, D., Onellion, M.
$Pb_{0.4}Bi_{1.6}Sr_2CaCu_2O_{8+x}$ ($Bi(Pb)-$2212) single crystal samples were studied using transmission electron microscopy (TEM), $ab-$plane ($\rho_{ab}$) and $c-$axis ($\rho_c$) resistivity, and high resolution angle-resolved ultraviolet photoem
Externí odkaz:
http://arxiv.org/abs/cond-mat/9410069
Autor:
Quitmann, C., Almeras, P., Ma, Jian, Kelley, R. J., Berger, H., Margaritondo, G., Onellion, M.
Doping Bi2Sr2Ca1Cu2O8+y with Co causes a superconductor-insulator transition. We study correlations between changes in the electrical resistivity RHOab(T) and the electronic bandstructure using identical single crystalline samples. For undoped sample
Externí odkaz:
http://arxiv.org/abs/cond-mat/9406021
We present the first detailed angle-resolved photoemission evidence that there are two types of carriers that contribute to the photoemission superconducting condensate in $Bi_{2}Sr_{2}Ca_{1}Cu_{2}O_{8+x}$. Our data indicate that both itinerant and s
Externí odkaz:
http://arxiv.org/abs/cond-mat/9405086
Autor:
Ma, Jian, Quitmann, C., Kelley, R. J., Alméras, P., Berger, H., Margaritondo, G., Onellion, M.
We have performed high energy resolution angle-resolved photoemission studies of the normal state band structure of oxygen overdoped $Bi_{2}Sr_{2}Ca_{1}Cu_{2}O_{8+x}$. We find that there is an extended saddle point singularity in the density of state
Externí odkaz:
http://arxiv.org/abs/cond-mat/9405050
We present the first detailed data of the momentum-resolved, temperature dependence of the superconducting gap of $Bi_{2}Sr_{2}Ca_{1}Cu_{2}O_{8+x}$, complemented by similar data on the intensity of the photoemission superconducting condensate spectra
Externí odkaz:
http://arxiv.org/abs/cond-mat/9404056
Autor:
Ma, Jian, Alméras, P., Kelley, R. J., Berger, H., Margaritondo, G., Umezawa, A., Cohen, Marvin L., Onellion, M.
A comparative study has been made of iodine-intercalated Bi$_{2}$Sr$_{2}$Ca$_{1}$Cu$_{2}$O$_{x}$ single crystal and 1 atm O$_{2}$ annealed Bi$_{2}$Sr$_{2}$Ca$_{1}$Cu$_{1}$O$_{x}$ single crystal using AC susceptibility measurement, X-ray photoemission
Externí odkaz:
http://arxiv.org/abs/cond-mat/9312006
Publikováno v:
Science, 1996 Mar 01. 271(5253), 1255-1257.
Externí odkaz:
https://www.jstor.org/stable/2889483