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10 papers · 2 filters
Optical probe of carrier doping by X-ray irradiation in organic dimer Mott insulator -(BEDT-TTF)Cu[N(CN)Cl
T. Sasaki, N. Yoneyama, Y. Nakamura +4
We investigated the infrared optical spectra of an organic dimer Mott insulator -(BEDT-TTF)Cu[N(CN)]Cl, which was irradiated with X-rays. We observed that the irradi…
Combining photoemission and optical spectroscopies for reliable valence determination in YbS and Yb metal
M. Matsunami, A. Chainani, M. Taguchi +13
Hard x-ray photoemission and optical spectroscopies have been performed on YbS and Yb metal to determine the precise -electron occupation. A comparison of the photoemission spec…
Magnetic and charge transport properties of the Na-based Os oxide pyrochlore
Y. G. Shi, A. A. Belik, M. Tachibana +5
Na-based osmium oxide pyrochlore was synthesized for the first time by an ion-exchange method. KOs2O6 was used as a host compound. Elelectron probe micro-analysis, synchrotron x-ra…
Magnetic and electronic Co states in layered cobaltate GdBaCo2O5.5-x
M. Garcia-Fernandez, V. Scagnoli, U. Staub +11
We have performed non-resonant x-ray diffraction, resonant soft and hard x-ray magnetic diffraction, soft x-ray absorption and x-ray magnetic circular dichroism measurements to cla…
Metallic Pattern Fabrication in Organic Mott Insulating Crystal by Local X-Ray Irradiation
Naoki Yoneyama, Takahiko Sasaki, Norio Kobayashi +3
We have fabricated a metallic structure in an organic Mott insulator -(BEDT-TTF)Cu[N(CN)]Cl. The periodic metallic domains of approximately 9090 m obtaine…
Quantum phase transitions of the asymmetric three-leg spin tube
Tôru Sakai, Masahiro Sato, Kouichi Okunishi +3
We investigate quantum phase transitions of the S=1/2 three-leg antiferromagnetic spin tube with asymmetric inter-chain (rung) exchange interactions. On the basis of the electron t…