[seminar] Seminar FO, Williams
hbuljan at phy.hr
hbuljan at phy.hr
Wed Aug 27 14:10:49 CEST 2008
Poštovani kolege,
idući utorak, 02.09., Dr. G.V.M. Williams s Novog Zelanda
održati će predavanje na Fizičkom odsjeku. Naslov predavanja jest
"Cu Nuclear Magnetic Resonance Intensity Reduction
in Electron-Doped Superconducting Cuprates".
Sažetak predavanja nalazi se u nastavku poruke.
Srdačan pozdrav,
Hrvoje Buljan
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SEMINAR FIZIČKOG ODSJEKA
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Vrijeme: utorak, 02. 09. 2008., 14:15 sati (točno)
Mjesto: Fizički odsjek, Bijenička c. 32, predavaonica F08
Cu Nuclear Magnetic Resonance Intensity Reduction
in Electron-Doped Superconducting Cuprates
Dr. Grant V. M. Williams
MacDiarmid Institute, Industrial Research,
P.O. Box 31310, Lower Hutt, New Zealand
A temperature-dependent nuclear magnetic resonance (NMR) intensity
reduction or wipe-out is best known in the hole-doped high temperature
superconducting cuprates (HTSCs) [1,2]. It has been attributed to a
slowing down of the spin and charge fluctuations. We have recently shown
that a temperature-dependent reduction in the Cu NMR intensity is also
observed in the electron-doped HTSCs, Pr2-xCexCuO4 and Sr0.9La0.1CuO2 for
less than 0.13 doped electrons per Cu [3,4]. In this talk we report the
results from recent measurements on the pure compounds as well as Ni-doped
samples.
[1] A. W. Hunt, P. M. Singer, K. R. Thurber, and T. Imai, Phys. Rev. Lett.
82, 4300 (1999).
[2] N. J. Curro, P. C. Hammel, B. J. Suh, M. Hücker, B. Büchner, U.
Ammerahl, and A. Revcolevschi, Phys. Rev. Lett. 85, 642 (2000).
[3] G. V. M. Williams, J. Haase, Min-Seok Park, Kyung Hee Kim, and Sung-Ik
Lee, Phys. Rev. B 72, 212511 (2005).
[4] G. V. M. Williams and J. Haase, Phys. Rev. B 75, 172506 (2007).
Voditelj seminara FO
Hrvoje Buljan, hbuljan at phy.hr
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