Výsledky vyhledávání - "Koumoulis, D."

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Two Band Model Interpretation of the p to n Transition in Ternary Tetradymite Topological Insulators

Autor: Chasapis, T. C., Koumoulis, D., Leung, B., Calta, N. P., Lo, S. -H, Dravid, V. P., Bouchard, L. S., Kanatzidis, M. G.

The requirement for large bulk resistivity in topological insulators has led to the design of complex ternary and quaternary phases with balanced donor and acceptor levels. A common feature of the optimized phases is that they lie close to the p to n

Externí odkaz: http://arxiv.org/abs/1506.05524

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139La NMR evidence for phase solitons in the ground state of overdoped manganites

Autor: Koumoulis, D., Panopoulos, N., Reyes, A., Fardis, M., Pissas, M., Douvalis, A., Bakas, T., Argyriou, D., Papavassiliou, G.

Hole doped transition metal oxides are famous due to their extraordinary charge transport properties, such as high temperature superconductivity (cuprates) and colossal magnetoresistance (manganites). Astonishing, the mother system of these compounds

Externí odkaz: http://arxiv.org/abs/0910.4494

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Spin order and lattice frustration in optimally doped manganites. A high temperature NMR study.

Autor: Panopoulos, N., Koumoulis, D., Diamantopoulos, G., Belesi, M., Fardis, M., Pissas, M., Papavassiliou, G.

The physics underlying the complex glassy phenomena, which accompany the formation of polarons in optimally doped manganites (ODM) is a cumbersome issue with many unexplained aspects. In this article we present $^{139}$La and $^{55}$Mn NMR in the tem

Externí odkaz: http://arxiv.org/abs/0909.1653

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