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Autor:
Kim, B. J., Jin, Hosub, Moon, S. J., Kim, J. -Y., Park, B. -G., Leem, C. S., Yu, Jaeju, Noh, T. W., Kim, C., Oh, S. -J., Park, J. -H., Durairaj, V., Cao, G., Rotenberg, E.
We investigated electronic structure of 5d transition-metal oxide Sr2IrO4 using angle-resolved photoemission, optical conductivity, and x-ray absorption measurements and first-principles band calculations. The system was found to be well described by
Externí odkaz:
http://arxiv.org/abs/0803.2927
Autor:
Noh, Han-Jin, Koh, H., Oh, S. -J., Park, J. -H., Kim, H. -D., Rameau, J. D., Valla, T., Kidd, T., Johnson, P. D., Hu, Y., Li, Q.
Publikováno v:
Europhysic Letters 81, 57006 (2008)
The electronic structure of $p$-type doped \BiTe is studied by angle resolved photoemission spectroscopy (ARPES) to experimentally confirm the mechanism responsible for the high thermoelectric figure of merit. Our ARPES study shows that the band edge
Externí odkaz:
http://arxiv.org/abs/0803.0052
Autor:
Cho, Deok-Yong, Lee, Jae-Min, Oh, S. -J., Jang, Hoyoung, Kim, J. -Y., Park, J. -H., Tanaka, A.
We investigated the unoccupied part of the electronic structure of the oxygen-deficient hafnium oxide (HfO$_{\sim1.8}$) using soft x-ray absorption spectroscopy at O $K$ and Hf $N_3$ edges. Band-tail states beneath the unoccupied Hf 5$d$ band are obs
Externí odkaz:
http://arxiv.org/abs/0707.2127
Autor:
Moon, S. J., Kim, M. W., Kim, K. W., Lee, Y. S., Kim, J. -Y., Park, J. -H., Kim, B. J., Oh, S. -J., Nakatsuji, S., Maeno, Y., Nagai, I., Ikeda, S. I., Cao, G., Noh, T. W.
We investigated the electronic structures of the two-dimensional layered perovskite Sr$_{2}$\textit{M}O$_{4}$ (\textit{M}=4\textit{d} Ru, 4\textit{d} Rh, and 5\textit{d} Ir) using optical spectroscopy and polarization-dependent O 1\textit{s} x-ray ab
Externí odkaz:
http://arxiv.org/abs/cond-mat/0607026
We study the growth of the Fe films on GaAs(100) at a low temperature, 140 K, by $in$-$situ$ UHV x-ray reflectivity using synchrotron radiation. We find rough surface with the growth exponent, $\beta_S$ = 0.51$\pm$0.04. This indicates that the growth
Externí odkaz:
http://arxiv.org/abs/cond-mat/0603123
We grow Fe film on (4 by 2)-GaAs(100) at low temperature, (~ 130 K) and study their chemical structure by photoelectron spectroscopy using synchrotron radiation. We observe the effective suppression of As segregation and remarkable reduction of alloy
Externí odkaz:
http://arxiv.org/abs/cond-mat/0602270
Autor:
Nirmala, R., Malik, S. K., Morozkin, A. V., Suresh, K. G., Kim, H. -D., Kim, J. -Y., Park, B. -G., Oh, S. -J.
A new ternary intermetallic compound, namely, YbMn2Sb2, has been synthesized and its magnetic and electrical transport properties have been studied in the temperature range of 2 to 300 K. This compound crystallizes in a trigonal, La2O2S type structur
Externí odkaz:
http://arxiv.org/abs/cond-mat/0501450
Korea's new VLBI project to construct the Korean VLBI Network (KVN) started in 2001, as a 7-year project that is fully funded by our government. We plan to build 3 new high-precision radio telescopes of 21-m diameter in 3 places in Korea, which will
Externí odkaz:
http://arxiv.org/abs/astro-ph/0412689
Autor:
Kim, Jung-Ho, Lee, Youngwoo, Souchkov, A, Lee, J. S., Drew, H. D., Oh, S. -J., Nan, C. W., Choi, E. J.
We have measured optical reflectivity of Li and Ti doped NiO (LTNO) in the infrared range at various temperatures. A Drude-like absorption is found at low energy, $\omega <$ 100 cm$^{-1}$ and its spectral weight increases substantially as temperature
Externí odkaz:
http://arxiv.org/abs/cond-mat/0409105