HOLDEN, Todd, Hanns HABERMEIER, Georg CRISTIANI, Andrzej GOLNIK, Alexander BORIS, Alexei PIMENOV and Josef HUMLÍČEK. Proximity induced metal-insulator transition in YBa2Cu3O7/La2/3Ca1/3MnO3 superlattices. Physical Review B. USA: The American Physical Society, 2004, vol. 69, No 6, p. 4505 1-7, 7 pp. ISSN 1098-0121. |
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@article{553803, author = {Holden, Todd and Habermeier, Hanns and Cristiani, Georg and Golnik, Andrzej and Boris, Alexander and Pimenov, Alexei and Humlíček, Josef}, article_location = {USA}, article_number = {6}, keywords = {SPECTROSCOPIC ELLIPSOMETRY; SYNCHROTRON-RADIATION; ANISOTROPIC MEDIA; SUPERCONDUCTIVITY; MAGNETORESISTANCE; HETEROSTRUCTURES; FERROMAGNETISM; RUSR2GDCU2O8; COEXISTENCE; MAGNETISM}, language = {eng}, issn = {1098-0121}, journal = {Physical Review B}, title = {Proximity induced metal-insulator transition in YBa2Cu3O7/La2/3Ca1/3MnO3 superlattices}, volume = {69}, year = {2004} }
TY - JOUR ID - 553803 AU - Holden, Todd - Habermeier, Hanns - Cristiani, Georg - Golnik, Andrzej - Boris, Alexander - Pimenov, Alexei - Humlíček, Josef PY - 2004 TI - Proximity induced metal-insulator transition in YBa2Cu3O7/La2/3Ca1/3MnO3 superlattices JF - Physical Review B VL - 69 IS - 6 SP - 4505 1-7 EP - 4505 1-7 PB - The American Physical Society SN - 10980121 KW - SPECTROSCOPIC ELLIPSOMETRY KW - SYNCHROTRON-RADIATION KW - ANISOTROPIC MEDIA KW - SUPERCONDUCTIVITY KW - MAGNETORESISTANCE KW - HETEROSTRUCTURES KW - FERROMAGNETISM KW - RUSR2GDCU2O8 KW - COEXISTENCE KW - MAGNETISM N2 - 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. ER -
HOLDEN, Todd, Hanns HABERMEIER, Georg CRISTIANI, Andrzej GOLNIK, Alexander BORIS, Alexei PIMENOV and Josef HUMLÍČEK. Proximity induced metal-insulator transition in YBa2Cu3O7/La2/3Ca1/3MnO3 superlattices. \textit{Physical Review B}. USA: The American Physical Society, 2004, vol.~69, No~6, p.~4505 1-7, 7 pp. ISSN~1098-0121.
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