Zobrazeno 1 - 10
of 548
pro vyhledávání: '"Onellion, M"'
Autor:
Zivkovic, I., Hirai, Y., Frazer, B. H., Prester, M., Drobac, D., Ariosa, D., Berger, H., Pavuna, D., Margaritondo, G., Felner, I., Onellion, M.
We report ac susceptibility data on RuSr_2(Eu,Ce)_2Cu_2O_(10-y) (Ru-1222, Ce content x=0.5 and 1.0), RuSr_2GdCu_2O_8 (Ru-1212) and SrRuO_3. Both Ru-1222 (x=0.5, 1.0) sample types exhibit unexpected magnetic dynamics in low magnetic fields: logarithmi
Externí odkaz:
http://arxiv.org/abs/cond-mat/0110181
Autor:
Zivkovic, I., Hirai, Y., Prester, M., Drobac, D., Ariosa, D., Margaritondo, G., Felner, I., Frazer, B. H., Onellion, M.
We report ac susceptibility measurements on polycrystalline samples of SrRuO_3 and three ruthenocuprates: superconducting RuSr_2GdCu_2O_8 (Ru-1212), superconducting RuSr_2Eu_(2-x)Ce_xCu_2O_y (Ru-1222, x=0.5) and nonsuperconducting, insulating RuSr_2E
Externí odkaz:
http://arxiv.org/abs/cond-mat/0107388
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
Autor:
Misra, S., Gatt, R., Schmauder, T., Chubukov, Andrey V., Onellion, M., Zacchigna, M., Vobornik, I., Zwick, F., Grioni, M., Margaritondo, G., Quitmann, C., Kendziora, C.
We analyzed photoemssion data for several doping levels of the Bi_2Sr_2CaCu_2O_{8+x} compounds, ranging from overdoped to underdoped. We show that the high frequency part of the spectra near (0,\pi) can be described by Fermi liquid theory in the over
Externí odkaz:
http://arxiv.org/abs/cond-mat/9805297
Autor:
Vobornik, I., Berger, H., Pavuna, D., Onellion, M., Margaritondo, G., Rullier Albenque, F., Forro, L., Grioni, M.
Similarities between the properties of disordered and underdoped cuprates
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5ade702fc11734d0c64152554913f740
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