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Critical fluctuations have been studied in the microwave conductivity of Bi_2Sr_2CaCu_2O_(8+\delta), Bi_2Sr_2Ca_2Cu_3O_(10+delta), and YBa_2Cu_3O_(7-delta) thin films above T_c. It is found that a consistent analysis of the real and imaginary parts o
Externí odkaz:
http://arxiv.org/abs/cond-mat/0307520
We report on the preparation and detection of entangled states between an electron spin 1/2 and a nuclear spin 1/2 in a molecular single crystal. These were created by applying pulses at ESR (9.5 GHz) and NMR (28 MHz) frequencies. Entanglement was de
Externí odkaz:
http://arxiv.org/abs/quant-ph/0209137
Critical fluctuations above $T_c$ are studied in the microwave complex conductivity of BSCCO-2212, BSCCO-2223, and YBCO thin films. The analysis of the experimental data yields the temperature dependences of the reduced coherence length $\xi(T)/\xi_0
Externí odkaz:
http://arxiv.org/abs/cond-mat/0209176
The short wavelength cutoff has been introduced in the calculation of ac fluctuation conductivity of superconductors. It is shown that a finite cutoff leads to a breakdown of the scaling property in frequency and temperature. Also, it increases the p
Externí odkaz:
http://arxiv.org/abs/cond-mat/0207748
We conclude from 23Na and 51V NMR measurements in NaxV2O5(x=0.996) a charge ordering transition starting at T=37 K and preceding the lattice distortion and the formation of a spin gap Delta=106 K at Tc=34.7 K. Above Tc, only a single Na site is obser
Externí odkaz:
http://arxiv.org/abs/cond-mat/9907326
Akademický článek
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Autor:
Schmid, M., Mahfouz, R., Bouhrara, M., Saih, Y., Mehring, M., Basset, J.-M., Goze-Bac, C., Abou-Hamad, E.
Publikováno v:
In Carbon November 2012 50(14):5292-5300
Publikováno v:
In Carbon May 2012 50(6):2100-2109