Metallic characteristics in superlattices composed of insulators, NdMnO3/SrMnO3/LaMnO3

Autor: Seo, J. W., Phan, B. T., Lee, J., Kim, H. -D., Panagopoulos, C.
Rok vydání: 2011
Předmět:
Zdroj: Appl. Phys. Lett. 98, 171910 (2011)
Druh dokumentu: Working Paper
DOI: 10.1063/1.3583586
Popis: We report on the electronic properties of superlattices composed of three different antiferromagnetic insulators, NdMnO3/SrMnO3/LaMnO3 grown on SrTiO3 substrates. Photoemission spectra obtained by tuning the x-ray energy at the Mn 2p -> 3d edge show a Fermi cut-off, indicating metallic behavior mainly originating from Mn e_g electrons. Furthermore, the density of states near the Fermi energy and the magnetization obey a similar temperature dependence, suggesting a correlation between the spin and charge degrees of freedom at the interfaces of these oxides.
Databáze: arXiv