Kazunori Umeo

Glasslike versus crystalline thermal conductivity in carrier-tuned Ba8 Ga16 X30 clathrates (X=Ge,Sn)

The present controversy over the origin of glasslike thermal conductivity observed in certain crystalline materials is addressed by studies on single-crystal x-ray diffraction, thermal conductivity

Ba8Ga16Sn30 with type-I clathrate structure: Drastic suppression of heat conduction

\ensuremath{\kappa}(T)

Cage-size control of guest vibration and thermal conductivity in Sr 8 Ga 16 Si 30 − x Ge x

, and specific heat

Non-Fermi-liquid behaviour at the pressure-induced antiferromagnetic to nonmagnetic transition in a heavy-fermion compound,

{C}_{p}(T)

Structural modification and metamagnetic anomaly in the ordered state of CeOs 2 Al 10

of carrier-tuned

Simultaneous superconducting and antiferroquadrupolar transitions in PrRh2Zn20

{\mathrm{Ba}}_{8}{\mathrm{Ga}}_{16}{X}_{30}

Large thermoelectric power in several metallic compounds of cerium and uranium

(X=\mathrm{Ge},\mathrm{Sn})

Successive Magnetic Transitions in a Frustrated Compound YbAgGe

clathrates. These crystals show radically different low-temperature

Ferromagnetic instability in a doped band gap semiconductor FeGa3

\ensuremath{\kappa}(T)