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Anharmonic properties of vibrational excitations in amorphous solids
Hideyuki Mizuno, Masanari Shimada, Atsushi Ikeda
Understanding the vibrational and thermal properties of amorphous solids is one of the most discussed and long-standing issues in condensed matter physics. Recent works have made s…
Low-frequency vibrations of jammed packings in large spatial dimensions
Masanari Shimada, Hideyuki Mizuno, Ludovic Berthier +1
Amorphous packings prepared in the vicinity of the jamming transition play a central role in theoretical studies of the vibrational spectrum of glasses. Two mean-field theories pre…
Detection of boson peak and fractal dynamics of disordered system using terahertz spectroscopy
Tatsuya Mori, Yue Jiang, Yasuhiro Fujii +8
Disordered systems exhibit universal excitation, referred to as the boson peak, in the terahertz region. Meanwhile, the so-called fracton is expected to appear in the nanoscale reg…
Boson peak, elasticity, and glass transition temperature in polymer glasses: Effects of the rigidity of chain bending
Naoya Tomoshige, Hideyuki Mizuno, Tatsuya Mori +2
The excess low-frequency vibrational spectrum, called boson peak, and non-affine elastic response are the most important particularities of glasses. Herein, the vibrational and mec…
Vibrational spectrum derived from the local mechanical response in disordered solids
Masanari Shimada, Hideyuki Mizuno, Atsushi Ikeda
The low-frequency vibrations of glasses are markedly different from those of crystals. These vibrations have recently been categorized into two types: spatially extended vibrations…
Impact of elastic heterogeneity on the propagation of vibrations at finite temperatures in glasses
H. Mizuno, S. Mossa
Some aspects of how sound waves travel through disordered solids are still unclear. Recent work has characterized a feature of disordered solids which seems to influence vibrationa…
Vibrational properties of two-dimensional dimer packings near the jamming transition
Kumpei Shiraishi, Hideyuki Mizuno, Atsushi Ikeda
Jammed particulate systems composed of various shapes of particles undergo the jamming transition as they are compressed or decompressed. To date, sphere packings have been extensi…
Sound damping in glasses: interplay between anharmonicities and elastic heterogeneities
Hideyuki Mizuno, Giancarlo Ruocco, Stefano Mossa
Some facets of the way sound waves travel through glasses are still unclear. Recent works have shown that in the low-temperature harmonic limit a crucial role in controlling sound…
Glassy dynamics of a model of bacterial cytoplasm with metabolic activities
Norihiro Oyama, Takeshi Kawasaki, Hideyuki Mizuno +1
Recent experiments have revealed that cytoplasms become glassy when their metabolism is suppressed, while they maintain fluidity in a living state. The mechanism of this active flu…