Zobrazeno 1 - 10
of 411
pro vyhledávání: '"Terasaki I"'
Publikováno v:
Phys. Rev. B 98, 205131 (2018)
We have measured the reflectivity spectra of the barium iridate $9R$ BaIrO$_3$, the crystal structure of which consists of characteristic Ir$_3$O$_{12}$ trimers. In the high-temperature phase above the transition temperature $T_c\simeq180$ K, we find
Externí odkaz:
http://arxiv.org/abs/1811.00219
Autor:
Mustonen, O., Vasala, S., Schmidt, K. P., Sadrollahi, E., Walker, H. C., Terasaki, I., Litterst, F. J., Baggio-Saitovitch, E., Karppinen, M.
Publikováno v:
Phys. Rev. B 98, 064411 (2018)
The spin-1/2 square-lattice Heisenberg model is predicted to have a quantum disordered ground state when magnetic frustration is maximized by competing nearest-neighbor $J_1$ and next-nearest-neighbor $J_2$ interactions ($J_2/J_1 \approx 0.5$). The d
Externí odkaz:
http://arxiv.org/abs/1804.08630
Autor:
Mustonen, O., Vasala, S., Sadrollahi, E., Schmidt, K. P., Baines, C., Walker, H. C., Terasaki, I., Litterst, F. J., Baggio-Saitovitch, E., Karppinen, M.
Publikováno v:
Nat. Commun. 9 (2018) 1085
A quantum spin liquid state has long been predicted to arise in spin-1/2 Heisenberg square-lattice antiferromagnets at the boundary region between N\'eel (nearest-neighbor interaction dominates) and columnar (next-nearest-neighbor dominates) antiferr
Externí odkaz:
http://arxiv.org/abs/1802.04805
To elucidate an origin of the two energy gaps in the narrow-gap semiconductor FeSb2, we have investigated the effects of hydrostatic pressure on the resistivity, Hall resistance and magnetoresistance at low temperatures. The larger energy gap evaluat
Externí odkaz:
http://arxiv.org/abs/1310.3451
We report the observation of photo-Seebeck effect in tetragonal PbO crystals. The photo-induced carriers contribute to the transport phenomena, and consequently the electrical conductivity increases and the Seebeck coefficient decreases with increasi
Externí odkaz:
http://arxiv.org/abs/1310.2492
Publikováno v:
J. Phys. Soc. Jpn. 82, 103702 (2013)
We present nonlinear conduction phenomena in the Mott insulator Ca2RuO4 investigated with a proper evaluation of self-heating effects. By utilizing a non-contact infrared thermometer, the sample temperature was accurately determined even in the prese
Externí odkaz:
http://arxiv.org/abs/1309.0909
Publikováno v:
Phys. Rev. B 85 (2012) 195122
We have measured high-field magnetization and magnetoresistance of polycrystalline samples of the A-site ordered perovskite CaCu3Ti4-xRuxO12 (x=0 - 4) utilizing a non-destructive pulsed magnet. We find that the magnetization for x=0.5, 1.0 and 1.5 is
Externí odkaz:
http://arxiv.org/abs/1203.4660
Publikováno v:
Phys. Rev. B 84, 205215 (2011)
We present a study of the magnetoresistance and Hall effect in the narrow-gap semiconductor FeSb2 at low temperatures. Both the electrical and Hall resistivities show unusual magnetic field dependence in the low-temperature range where a large Seebec
Externí odkaz:
http://arxiv.org/abs/1110.6854
Publikováno v:
Phys. Rev. B 84, 075110 (2011)
We study the optical properties of the layered rhodium oxide K0.49RhO2, which is isostructural to the thermoelectric material NaxCoO2. The optical conductivity shows broad interband transition peaks as well as a low-energy Drude-like upturn, reminisc
Externí odkaz:
http://arxiv.org/abs/1107.4423
We investigate thermal rectification in a bulk material with a pyramid shape to elucidate shape dependence of the thermal rectification, and find that rectifying coefficient R is 1.35 for this shape, which is smaller than R=1.43 for a rectangular sha
Externí odkaz:
http://arxiv.org/abs/1102.4182