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Neutron scattering studies of nanomagnetism and artificially structured materials

“…Examples include producing collective states (mostly in superconductors) by light [144] or with pressure [145]. Similar effects have been observed recently in manganites [146] where persistent photoinduced magnetism was produced.…”

Persistent electrical doping of Bi2Sr2CaCu2OMotzkau1, Jacobs2, Katterwe3 et al. 2012Phys. Rev. B131100View full textAdd to dashboardCite

“…Photo-doping allows a wide-range variation of doping in the same sample [17][18][19]. The ordinary non-equilibrium photo-doping is quickly relaxing because of a very short life time (∼ps) of photoinduced charge carriers [19].…”

“…The ordinary non-equilibrium photo-doping is quickly relaxing because of a very short life time (∼ps) of photoinduced charge carriers [19]. However, in underdoped YBa 2 Cu 3 O 6+x and some other cuprates a different type of persistent photo-doping takes place [17,18]. It involves significant energies ∼1 eV, which makes it metastable at low temperatures.…”

“…The carrier concentration can be also varied via two physical doping processes, well established for semiconductors: photo-doping [17][18][19] and through the electric-field effect [20][21][22][23][24][25]. In case of cuprates, physical doping may be persistent at low temperatures in a sense that it is relaxing very slowly after removing the light [17,18] or field [21,[23][24][25].…”

“…In case of cuprates, physical doping may be persistent at low temperatures in a sense that it is relaxing very slowly after removing the light [17,18] or field [21,[23][24][25]. Recently, a persistent electric doping via strong current injection was discovered [24,25].…”