588 citations · 925 across the 18 of their papers we have counts for
5 papers · 1 filter
Off-center Rattling Triggers High-Temperature Thermal Transport in Thermoelectric lathrates: Non-Perturbative Approach
Qing Xi, Zhongwei Zhang, Tsuneyoshi Nakayama +3
Lattice thermal conductivities of type-I clathrates encapsulating "off-center" guest atoms behave in a way that is sharply different from those of conventional crystals…
Phonon-glass electron-crystal thermoelectric clathrates: Experiments and theory
Toshiro Takabatake, Koichiro Suekuni, Tsuneyoshi Nakayama +1
Type-I clathrate compounds have attracted a great deal of interest in connection with the search for efficient thermoelectric materials. These compounds constitute networked cages…
Significance of Off-Center Rattling for Emerging Low-lying THz Modes in type-I Clathrates
Tsuneyoshi Nakayama, Eiji Kaneshita
We show that the distinct differences of low-lying THz-frequency dynamics between type-I clathrates with on-center and off-center guest ions naturally follow from a theoretical mod…
Glass-like Thermal-Transport in Symmetry-Broken Clathrates
Eiji Kaneshita, Tsuneyoshi Nakayama
We present the quantitative interpretation for the glass-like behavior of thermal conductivities for type-I clathrate compounds involving off-centered guest ions. It is show…
Interacting quantum rotors in oxygen-doped germanium
Hiroyuki Shima, Tsuneyoshi Nakayama
We investigate the interaction effect between oxygen impurities in crystalline germanium on the basis of a quantum rotor model. The dipolar interaction of nearby oxygen impurities…