Takao Nanba

Pressure transmitting medium Daphne 7474 solidifying at 3.7 GPa at room temperature

A pressure transmitting medium named Daphne 7474, which solidifies at P(s)=3.7 GPa at room temperature, is presented. The value of P(s) increases almost linearly with temperature up to 6.7 GPa at 100 degrees C. The high pressure realized by a medium at the liquid state allows a higher limit of pressurization, which assures an ideal hydrostatic pressure. We show a volume change against pressure, pressure reduction from room to liquid helium temperature in a clamped piston cylinder cell, pressure distribution and its standard deviation in a diamond anvil cell, and infrared properties, which might be useful for experimental applications.

Optical conductivity of the Kondo insulator YbB12 : Gap formation and low-energy excitations

Optical reflectivity experiments have been conducted on single crystals of the Kondo insulator

EPR and AFMR of Bi2CuO4 in Submillimeter Wave Region

{\mathrm{YbB}}_{12}

Gap state of SmB6

in order to obtain its optical conductivity, \ensuremath{\sigma}(\ensuremath{\omega}). Upon cooling below 70 K, a strong suppression of \ensuremath{\sigma}(\ensuremath{\omega}) is seen in the far-infrared region, indicating the opening of an energy gap of

Reconstruction of BL7B for UV, VIS and IR spectroscopy with a 3 m normal-incidence monochromator

\ensuremath{\sim}25\mathrm{meV}.

Pseudogap Formation and Heavy-Carrier Dynamics in Intermediate-Valence YbAl3

This gap development is coincident with a rapid decrease in the magnetic susceptibility, which shows that the gap opening has significant influence on magnetic properties. A narrow, asymmetric peak is observed at

Optical Measurements and Band Calculations of FeSi.

\ensuremath{\sim}40\mathrm{meV}

Reflectivity and Electronic Structures of Layered Ionic Crystals, (CnH2n+1NH3)2CdCl4: n=1, 2, 3

in \ensuremath{\sigma}(\ensuremath{\omega}), which is attributed to optical transitions between the Yb

Gap Formation in the Filled Skutterudite CeOs4Sb12

4f

Pressure tuning of an ionic insulator into a heavy electron metal: an infrared study of YbS.

-derived states across the gap. In addition, a broad peak is observed at