Zobrazeno 1 - 10
of 223
pro vyhledávání: '"Gaál, R."'
Autor:
Pisoni, A., Gaal, R., Zeugner, A., Falkowski, V., Isaeva, A., Huppertz, H., Autes, G., Yazyev, O. V., Forro, L.
Publikováno v:
Phys. Rev. B 95, 235149 (2017)
We report a detailed study of the transport coefficients of $\beta$-Bi$_4$I$_4$ quasi-one dimensional topological insulator. Electrical resistivity, thermoelectric power, thermal conductivity and Hall coefficient measurements are consistent with the
Externí odkaz:
http://arxiv.org/abs/1702.04794
Publikováno v:
Physical Review B, 93, 094519, (2016)
We report a detailed study of the electrical transport properties of single crystals of Pr$_4$Fe$_2$As$_2$Te$_{1-x}$O$_4$, a recently discovered iron-based superconductor. Resistivity, Hall effect and magnetoresistance are measured in a broad tempera
Externí odkaz:
http://arxiv.org/abs/1612.07090
Publikováno v:
Journal of Physics: Condensed Matter, Volume 28, Number 11 (2016)
We present a detailed study of the electrical transport properties of a recently discovered iron-based superconductor: Sm$_4$Fe$_2$As$_2$Te$_{0.72}$O$_{2.8}$F$_{1.2}$. We followed the temperature dependence of the upper critical field by resistivity
Externí odkaz:
http://arxiv.org/abs/1612.05792
Autor:
Spina, M., Lehmann, M., Náfrádi, B., Bernard, L., Bonvin, E., Gaál, R., Magrez, A., Forró, L., Horváth, E.
Publikováno v:
Small 11, 4824-4828, (2015)
Methylammonium lead iodide perovskite has revolutionized the field of third generation solid-state solar cells leading to simple solar cell structures1 and certified efficiencies up to 20.1%. Recently the peculiar light harvesting properties of organ
Externí odkaz:
http://arxiv.org/abs/1612.00935
Publikováno v:
Nanoscale, 8, 4888-4893, (2016)
Field-effect phototransistors were fabricated based on individual carbon nanotubes (CNTs) sensitized by CH$_3$NH$_3$PbI$_3$ nanowires (MAPbI$_3$NW). These devices represent light responsivities of R=7.7x10$^5$ A/W at low-lighting conditions in the nW
Externí odkaz:
http://arxiv.org/abs/1611.09205
Autor:
Pisoni, A., Jacimovic, J., Náfrádi, B., Szirmai, P., Spina, M., Gaál, R., Holczer, K., Tutis, E., Forró, L., Horváth, E.
The intrinsic d.c. electrical resistivity ($\rho$) - measurable on single crystals only - is often the quantity first revealing the properties of a given material. In the case of CH$_3$NH$_3$PbI$_3$ perovskite measuring $\rho$ under white light illum
Externí odkaz:
http://arxiv.org/abs/1604.05637
Autor:
Katrych, S., Pisoni, A., Bosma, S., Weyeneth, S., Zhigadlo, N. D., Gaal, R., Karpinski, J., Forró, L.
The synthesis, structural and physical properties of iron lanthanide oxypnictide superconductors, L4Fe2As2Te1-xO4 (L = Pr, Sm, Gd), with transition temperature at ~ 25 K are reported. Single crystals have been grown at high pressure using cubic anvil
Externí odkaz:
http://arxiv.org/abs/1311.5437
Publikováno v:
Phys. Rev. B 87, 224508 (2013)
We demonstrate that the thermopower (S) can be used to probe the spin fluctuations (SFs) in proximity to the quantum critical point (QCP) in Fe-based superconductors. The sensitivity of S to the entropy of charge carriers allows us to observe an incr
Externí odkaz:
http://arxiv.org/abs/1206.2938
Autor:
Arsenijević, S., Gaál, R., Sefat, A. S., McGuire, M. A., Sales, B. C., Mandrus, D., Forró, L.
Publikováno v:
Phys. Rev. B 84, 075148 (2011)
We report the temperature dependence of the resistivity and thermoelectric power under hydrostatic pressure of the itinerant antiferromagnet BaFe2As2 and the electron-doped superconductor Ba(Fe0.9Co0.1)2As2. We observe a hole-like contribution to the
Externí odkaz:
http://arxiv.org/abs/1103.4501
Autor:
Kezsmarki, I., Gaal, R., Homes, C. C., Sipos, B., Berger, H., Bordacs, S., Mihaly, G., Forro, L.
Publikováno v:
HYSICAL REVIEW B 76, 205114 (2007)
We have extended the range of the high-pressure optical spectroscopy to the far-infrared region keeping the accuracy of ambient-pressure experiments. The newly-developed method offers a powerful tool for the study of pressure-induced phase transition
Externí odkaz:
http://arxiv.org/abs/0708.3998