Zobrazeno 1 - 10
of 415
pro vyhledávání: '"Regier, T."'
Autor:
Green, R. J., Wadati, H., Regier, T. Z., Achkar, A. J., McMahon, C., Clancy, J. P., Dabkowska, H. A., Gaulin, B. D., Sawatzky, G. A., Hawthorn, D. G.
The electronic structure of LiNiO$_2$, a promising Li-ion battery cathode material, has remained a challenge to understand due to its highly covalent yet correlated nature. Here we elucidate the electronic structure in LiNiO$_2$ and the related compo
Externí odkaz:
http://arxiv.org/abs/2011.06441
Autor:
Green, R. J., Regier, T. Z., Leedahl, B., McLeod, J. A., Xu, X. H., Chang, G. S., Kurmaev, E. Z., Moewes, A.
Publikováno v:
Phys. Rev. Lett. 115, 167401 (2015)
Dilute magnetic semiconductors (DMSs) show great promise for applications in spin-based electronics, but in most cases continue to elude explanations of their magnetic behavior. Here, we combine quantitative x-ray spectroscopy and Anderson impurity m
Externí odkaz:
http://arxiv.org/abs/1510.05030
Autor:
Ootsuki, D., Takubo, K., Kudo, K., Ishii, H., Nohara, M., Saini, N. L., Sutarto, R., He, F., Regier, T. Z., Zonno, M., Schneider, M., Levy, G., Sawatzky, G. A., Damascelli, A., Mizokawa, T.
Publikováno v:
Phys. Rev. B, 90,144515 (2014)
We report a photoemission and x-ray absorption study on Au1-xPtxTe2 (x = 0 and 0.35) triangular lattice in which superconductivity is induced by Pt substitution for Au. Au 4f and Te 3d core-level spectra of AuTe2 suggests a valence state of Au2+(Te2)
Externí odkaz:
http://arxiv.org/abs/1410.2967
Autor:
Chiou, J. W., Ray, Sekhar C., Peng, S. I., Chuang, C. H., Wang, B. Y., Tsai, H. M., Pao, C. W., Lin, H. -J., Shao, Y. C., Wang, Y. F., Chen, S. C., Pong, W. F., Yeh, Y. C., Chen, C. W., Chen, L. -C., Chen, K. -H., Tsai, M. -H., Kumar, A., Ganguly, A., Papakonstantinou, P., Yamane, H., Kosugi, N., Regier, T., Liu, L., Sham, T. K.
Publikováno v:
Journal of Physical Chemistry C, (2012), 116, 16251--16258
This study investigates the strong photoluminescence (PL) and X-ray excited optical luminescence observed in nitrogen-functionalized 2D graphene nanoflakes (GNFs:N), which arise from the significantly enhanced density of states in the region of {\pi}
Externí odkaz:
http://arxiv.org/abs/1208.0885
Autor:
Levy, G., Sutarto, R., Chevrier, D., Regier, T., Blyth, R., Geck, J., Wurmehl, S., Harnagea, L., Wadati, H., Mizokawa, T., Elfimov, I. S., Damascelli, A., Sawatzky, G. A.
Publikováno v:
Phys. Rev. Lett. 109, 077001 (2012)
The role of Co substitution in the low-energy electronic structure of Ca(Fe$_{0.944}$Co$_{0.056}$)$_2$As$_2$ is investigated by resonant photoemission spectroscopy and density functional theory. The Co 3d-state center-of-mass is observed at 250 meV h
Externí odkaz:
http://arxiv.org/abs/1203.5814
Autor:
Wadati, H., Achkar, A. J., Hawthorn, D. G., Regier, T. Z., Singh, M. P., Truong, K. D., Fournier, P., Chen, G., Mizokawa, T., Sawatzky, G. A.
Publikováno v:
Appl. Phys. Lett. 100, 193906 (2012)
X-ray absorption spectroscopy (XAS) is one of the most widely used experimental techniques to study the electronic and spatial structure of materials. Fluorescence yield mode is bulk-sensitive, but has several serious problems coming from saturation
Externí odkaz:
http://arxiv.org/abs/1201.0828
Publikováno v:
Scientific Reports 1, 182 (2011)
An alternative measure of x-ray absorption spectroscopy (XAS) called inverse partial fluorescence yield (IPFY) has recently been developed that is both bulk sensitive and free of saturation effects. Here we show that the angle dependence of IPFY can
Externí odkaz:
http://arxiv.org/abs/1104.0259
Autor:
Wadati, H., Kato, K., Wakisaka, Y., Sudayama, T., Hawthorn, D. G., Regier, T. Z., Onishi, N., Azuma, M., Shimakawa, Y., Mizokawa, T., Tanaka, A., Sawatzky, G. A.
Publikováno v:
Solid State Commun. 162, 18 (2013)
We investigated the electronic structure of layered Mn oxide Bi3Mn4O12(NO3) with a Mn honeycomb lattice by x-ray absorption spectroscopy. The valence of Mn was determined to be 4+ with a small charge-transfer energy. We estimated the values of supere
Externí odkaz:
http://arxiv.org/abs/1101.2847
Autor:
Wadati, H., Hawthorn, D. G., Regier, T. Z., Chen, G., Hitosugi, T., Mizokawa, T., Tanaka, A., Sawatzky, G. A.
Publikováno v:
Appl. Phys. Lett. 97, 022106 (2010)
We present an x-ray absorption study of the oxidation states of transition-metal-ions of LiMnO2 and its related materials, widely used as cathodes in Li-ion batteries. The comparison between the obtained spectrum and the configuration-interaction clu
Externí odkaz:
http://arxiv.org/abs/1004.0185
Publikováno v:
Phys. Rev. B 83, 081106(R) (2011)
We demonstrate a new method of x-ray absorption spectroscopy (XAS) that is bulk sensitive, like traditional fluorescence yield measurements, but is not affected by self-absorption or saturation effects. This measure of XAS is achieved by scanning the
Externí odkaz:
http://arxiv.org/abs/1001.1925