Zobrazeno 1 - 10
of 43
pro vyhledávání: '"B. Gegenheimer"'
Autor:
X. X. Xi, Th. Wolf, N. Nücker, Hans Peter Geserich, Wolf Assmus, B. Koch, B. Gegenheimer, J. Fink, H. Romberg, M. Dürrler
Publikováno v:
Zeitschrift f�r Physik B Condensed Matter. 78:367-380
Electronic excitations with polarization parallel to the CuO2-planes in single-crystalline YBa2Cu3O7 and YBa2Cu3O6 have been investigated by optical reflectance and by highenergy electron energy-loss spectroscopy in transmission in the energy ranges
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6c789b73829315b46d894316c1b505c1
https://doi.org/10.1007/bf01313317
https://doi.org/10.1007/bf01313317
Publikováno v:
Physica C: Superconductivity. 166:36-48
Domain patterns of magnetic flux penetrated in YBa2Cu3O7−δ superconductors have been observed by means of a high-resolution Faraday technique. The experimental conditions for observing domain patterns with the high-resolution Faraday effect are di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bee4d9ed6c0cf30ca80d454980f716e5
https://doi.org/10.1016/0921-4534(90)90549-t
https://doi.org/10.1016/0921-4534(90)90549-t
Publikováno v:
Physical Review B. 41:830-833
We have measured resonant phonon Raman profiles of a superconducting Pb{sub 2}Sr{sub 2}Y{sub 0.75}Ca{sub 0.25}Cu{sub 3}O{sub 8+{delta}} crystal for laser energies from 1.65 to 2.7 eV. The resonances at 1.75 and 2.55 eV and the rise towards the uv, al
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::601a55ace38e0169ec15da96a08f4726
https://doi.org/10.1103/physrevb.41.830
https://doi.org/10.1103/physrevb.41.830
Autor:
W. Joss, Axel H. E. Müller, W. Bauhofer, Hj. Mattausch, R. K. Kremer, A. Simon, B. Gegenheimer, W. Biberacher
Publikováno v:
Physica B: Condensed Matter. 163:476-478
We report contact-free measurements of the temperature dependence of the upper critical field (most probably the onset field of flux line motion), Hc2(T), of an untwinned single-crystal YBa2Cu3O7−δ for δ ≌ 0.1 and δ ≌ 0.4. The sample was ori
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de43ad669a2fb0365d176d4b886fb443
https://doi.org/10.1016/0921-4526(90)90245-p
https://doi.org/10.1016/0921-4526(90)90245-p
Publikováno v:
Physica C: Superconductivity. :1756-1759
We present Raman scattering results obtained on untwinned single crystals of YBa 2 Cu 3 O 7-δ . The orthorhombic symmetry of the crystal is evident from the spectra and leads to the assignment of two defect-induced ir active modes.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f9c6bf9d40e2da2293f598ca7e1d4429
https://doi.org/10.1016/0921-4534(88)90468-6
https://doi.org/10.1016/0921-4534(88)90468-6
Publikováno v:
Physical Review B. 40:2654-2657
Raman Spectra of a superconducting ${\mathrm{Pb}}_{2}$${\mathrm{Sr}}_{2}$${\mathrm{Y}}_{0.75}$${\mathrm{Ca}}_{0.25}$${\mathrm{Cu}}_{3}$${\mathrm{O}}_{8+\mathrm{\ensuremath{\delta}}}$ single crystal (${T}_{c}$\ensuremath{\approxeq}20 K) have been meas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dba805a671aebe6999a74042a90ae98f
https://doi.org/10.1103/physrevb.40.2654
https://doi.org/10.1103/physrevb.40.2654
Autor:
W. Joss, A. Simon, W. Biberacher, B. Gegenheimer, R. K. Kremer, Hj. Mattausch, Axel H. E. Müller, W. Bauhofer
Publikováno v:
Physical Review Letters. 63:2520-2523
We have performed a detailed anisotropy study of the superconducting properties of untwinned single crystals of ${\mathrm{YBa}}_{2}$${\mathrm{Cu}}_{3}$${\mathrm{O}}_{7\mathrm{\ensuremath{-}}\mathrm{\ensuremath{\delta}}}$ for \ensuremath{\delta}\ensur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::27f761ccd707c7df36621561e0c9c79f
https://doi.org/10.1103/physrevlett.63.2520
https://doi.org/10.1103/physrevlett.63.2520
Autor:
J. Prade, Winfried Kress, de Wette Fw, Anil D. Kulkarni, Christian Thomsen, U. Schröder, Manuel Cardona, R. Liu, B. Gegenheimer
Publikováno v:
Physical Review B. 37:7971-7974
We have determined the components of the Raman tensor of signal-crystal superconducting ${\mathrm{YBa}}_{2}$${\mathrm{Cu}}_{3}$${\mathrm{O}}_{7\mathrm{\ensuremath{-}}\mathrm{\ensuremath{\delta}}}$ for the phonons at \ensuremath{\sim}500, 440, 330, an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::276c4e06e8ea9331e371708beaab6a39
https://doi.org/10.1103/physrevb.37.7971
https://doi.org/10.1103/physrevb.37.7971
Publikováno v:
Physica C: Superconductivity. 159:117-123
The penetration of the Shubnikov phase into both single-crystal and sintered YBaCuO specimens has been observed by means of the magneto-optical Faraday effect using the high Verdet constant in thin evaporated films of a mixture of EuS and EuF 2 . Thi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::74266596cf050994b9ff6ca5a337e0c6
https://doi.org/10.1016/0921-4534(89)90112-3
https://doi.org/10.1016/0921-4534(89)90112-3
Publikováno v:
Journal of Solid State Chemistry. 77:200-203
Crystals of YBa 2 Cu 3 O 6.93 were grown in a SnO 2 crucible. Parts of these crystals were untwinned and isolated for X-ray structure investigations at seven temperatures between 103 and 303 K. The positions of the chain atoms Cu(1) and O(4) are occu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bb758a16b7ca6732221cf9762b70ce1d
https://doi.org/10.1016/0022-4596(88)90110-7
https://doi.org/10.1016/0022-4596(88)90110-7