Zobrazeno 1 - 10
of 301
pro vyhledávání: '"Brom H"'
Autor:
van der Klink, J. J., Brom, H. B.
The NiO4 plaquettes in La2NiO4.17, a cousin of the hole-doped high-temperature superconductor La{2-x}SrxCuO4, have been studied by 61Ni-NMR in 14 T in a single crystal enriched in 61Ni. Doped and undoped plaquettes are discriminated by the shift of t
Externí odkaz:
http://arxiv.org/abs/1003.0553
Autor:
Krohns, S., Lunkenheimer, P., Kant, Ch., Pronin, A. V., Brom, H. B., Nugroho, A. A., Diantoro, M., Loidl, A.
Publikováno v:
Appl. Phys. Lett. 91, 122903 (2009)
The search for new materials with extremely high ("colossal") dielectric constants, required for future electronics, is one of the most active fields of modern materials science. However, the applicability of the colossal-epsilon' materials, discover
Externí odkaz:
http://arxiv.org/abs/0811.1556
Conducting submicron particles are well-suited as filler particles in non-conducting polymer matrices to obtain a conducting composite with a low percolation threshold. Going to nanometer-sized filler particles imposes a restriction to the conductivi
Externí odkaz:
http://arxiv.org/abs/0801.2228
Publikováno v:
Physical Review Letters 96 (2006) 117002
Compelling evidence for band-type conductivity and even bulk superconductivity below $T\_{\text{c}}\approx 8$ K has been found in $^{69,71}$Ga-NMR experiments in crystalline ordered, giant Ga$\_{84}$ cluster-compounds. This material appears to repres
Externí odkaz:
http://arxiv.org/abs/cond-mat/0511612
Autor:
Morello, A., Mettes, F. L., Bakharev, O. N., Brom, H. B., de Jongh, L. J., Luis, F., Fernandez, J. F., Aromi, G.
Publikováno v:
Phys. Rev. B 73, 134406 (2006)
Few examples of magnetic systems displaying a transition to pure dipolar magnetic order are known to date, and single-molecule magnets can provide an interesting example. The molecular cluster spins and thus their dipolar interaction energy can be qu
Externí odkaz:
http://arxiv.org/abs/cond-mat/0509261
Publikováno v:
Applied Physics Letters 86, 252107 (2005)
The high-frequency mobility in disordered systems is governed by transport properties on mesoscopic length scales, which makes it a sensitive probe for the amount of local order. Here we present a method to measure the energy dependence of the high f
Externí odkaz:
http://arxiv.org/abs/cond-mat/0509141
Publikováno v:
Phys. Rev. B 72, 054208 (2005)
The evolution of the density of states (DOS) and conductivity as function of well controlled doping levels in OC_1C_10-poly(p-phenylene vinylene) [OC_1C_10-PPV] doped by FeCl_3 and PF_6, and PF_6 doped polypyrrole (PPy-PF_6 have been investigated. At
Externí odkaz:
http://arxiv.org/abs/cond-mat/0509143
The process of ageing in rubbers requires monitoring over long periods (days to years). To do so in non-conducting rubbers, small amounts of carbon-black particles were dispersed in a fractal network through the rubber matrix, to make the rubber cond
Externí odkaz:
http://arxiv.org/abs/cond-mat/0412187
Autor:
Martens, H. C. F., Brom, H. B.
As the periodicity in crystalline materials creates the optimal condition for electronic delocalization, one might expect that in partially crystalline conjugated polymers delocalization is impeded by intergrain transport. However, for the best condu
Externí odkaz:
http://arxiv.org/abs/cond-mat/0411337
Publikováno v:
Phys. Rev. B 70, 193106 (2004)
The established scaling laws of the conductivity with temperature and doping are strong indications for the quantum nature of the metal-insulator transition in YH$_x$. Here we report the first results on the frequency scaling of the conductivity. Sam
Externí odkaz:
http://arxiv.org/abs/cond-mat/0409423