2004
Proximity induced metal-insulator transition in YBa2Cu3O7/La2/3Ca1/3MnO3 superlattices
HOLDEN, Todd, Hanns HABERMEIER, Georg CRISTIANI, Andrzej GOLNIK, Alexander BORIS et. al.Základní údaje
Originální název
Proximity induced metal-insulator transition in YBa2Cu3O7/La2/3Ca1/3MnO3 superlattices
Název česky
Přechod kov-izolátor v supermřížkách YBa2Cu3O7/La2/3Ca1/3MnO3
Autoři
HOLDEN, Todd (840 Spojené státy), Hanns HABERMEIER (276 Německo), Georg CRISTIANI (276 Německo), Andrzej GOLNIK (616 Polsko), Alexander BORIS (643 Rusko), Alexei PIMENOV (616 Polsko) a Josef HUMLÍČEK (203 Česká republika, garant)
Vydání
Physical Review B, USA, The American Physical Society, 2004, 1098-0121
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10302 Condensed matter physics
Stát vydavatele
Spojené státy
Utajení
není předmětem státního či obchodního tajemství
Impakt faktor
Impact factor: 3.075
Kód RIV
RIV/00216224:14310/04:00021198
Organizační jednotka
Přírodovědecká fakulta
UT WoS
000220092100066
Klíčová slova anglicky
SPECTROSCOPIC ELLIPSOMETRY; SYNCHROTRON-RADIATION; ANISOTROPIC MEDIA; SUPERCONDUCTIVITY; MAGNETORESISTANCE; HETEROSTRUCTURES; FERROMAGNETISM; RUSR2GDCU2O8; COEXISTENCE; MAGNETISM
Štítky
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 9. 4. 2010 15:01, prof. RNDr. Josef Humlíček, CSc.
V originále
The far-infrared dielectric response of superlattices (SL) composed of superconducting YBa2Cu3O7 (YBCO) and ferromagnetic La0.67Ca0.33MnO3 (LCMO) has been investigated by ellipsometry. A drastic decrease of the free-carrier response is observed which involves an unusually large length scale of d(crit)approximate to20 nm in YBCO and d(crit)approximate to10 nm in LCMO. A corresponding suppression of metallicity is not observed in SL's where LCMO is replaced by the paramagnetic metal LaNiO3. Our data suggest that either a long-range charge transfer from the YBCO to the LCMO layers or alternatively a strong coupling of the charge carriers to the different and competitive kind of magnetic correlations in the LCMO and YBCO layers is at the heart of the observed metal-insulator transition. The low free-carrier response observed in the far-infrared dielectric response of the magnetic superconductor RuSr2GdCu2O8 is possibly related to this effect.
Česky
The far-infrared dielectric response of superlattices (SL) composed of superconducting YBa2Cu3O7 (YBCO) and ferromagnetic La0.67Ca0.33MnO3 (LCMO) has been investigated by ellipsometry. A drastic decrease of the free-carrier response is observed which involves an unusually large length scale of d(crit)approximate to20 nm in YBCO and d(crit)approximate to10 nm in LCMO. A corresponding suppression of metallicity is not observed in SL's where LCMO is replaced by the paramagnetic metal LaNiO3. Our data suggest that either a long-range charge transfer from the YBCO to the LCMO layers or alternatively a strong coupling of the charge carriers to the different and competitive kind of magnetic correlations in the LCMO and YBCO layers is at the heart of the observed metal-insulator transition. The low free-carrier response observed in the far-infrared dielectric response of the magnetic superconductor RuSr2GdCu2O8 is possibly related to this effect.
Návaznosti
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