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Effective medium theory for viscoelasticity of soft jammed solids
Hideyuki Mizuno, Atsushi Ikeda
The viscoelastic properties of soft jammed solids, such as foams, emulsions, and soft colloids, have been the subject of experiments, with particular interest in the anomalous visc…
Structural fluctuations in active glasses
Masaki Yoshida, Hideyuki Mizuno, Atsushi Ikeda
The glassy dynamics of dense active matter have recently become a topic of interest due to their importance in biological processes such as wound healing and tissue development. Ho…
Unified study of viscoelasticity and sound damping in hard and soft amorphous solids
Hideyuki Mizuno, Kuniyasu Saitoh, Yusuke Hara +1
Recent research has made significant progress in understanding the non-phonon vibrational states present in amorphous materials. It has been established that their vibrational dens…
Heterogeneity and Low-Frequency Vibrations in Bidisperse Sphere Packings
Yusuke Hara, Hideyuki Mizuno, Atsushi Ikeda
In the jamming transition of monodisperse packings, spatial heterogeneity is irrelevant as the transition is described by mean-field theories. Here, we show that this situation dra…
Microrheology near jamming
Yusuke Hara, Hideyuki Mizuno, Atsushi Ikeda
The jamming transition is a nonequilibrium critical phenomenon, which governs characteristic mechanical properties of jammed soft materials, such as pastes, emulsions, and granular…
Arrhenius temperature dependence of the crystallization time of deeply supercooled liquids
Yuki Takaha, Hideyuki Mizuno, Atsushi Ikeda
Usually, supercooled liquids and glasses are thermodynamically unstable against crystallization. Classical nucleation theory (CNT) has been used to describe the crystallization dyn…
Non-phononic density of states of two-dimensional glasses revealed by random pinning
Kumpei Shiraishi, Hideyuki Mizuno, Atsushi Ikeda
The vibrational density of states of glasses is considerably different from that of crystals. In particular, there exist spatially localized vibrational modes in glasses. The densi…
Johari-Goldstein relaxation in glassy dynamics originates from two-scale energy landscape
Kumpei Shiraishi, Hideyuki Mizuno, Atsushi Ikeda
Supercooled liquids undergo complicated structural relaxation processes, which have been a long-standing problem in both experimental and theoretical aspects of condensed matter ph…
Low-Frequency Vibrational States in Ideal Glasses with Random Pinning
Kumpei Shiraishi, Yusuke Hara, Hideyuki Mizuno
Glasses exhibit spatially localized vibrations in the low-frequency regime. These localized modes emerge below the boson peak frequency , and their vibrational densiti…
Phonon transport properties of particulate physical gels
Hideyuki Mizuno, Makoto Hachiya, Atsushi Ikeda
Particulate physical gels are sparse, low-density amorphous materials in which clusters of glasses are connected to form a heterogeneous network structure. This structure is charac…
Instantaneous normal modes of glass-forming liquids during the athermal relaxation process of the steepest descent algorithm
Masanari Shimada, Kumpei Shiraishi, Hideyuki Mizuno +1
Understanding glass formation by quenching remains a challenge in soft condensed matter physics. Recent numerical studies on steepest descent dynamics, which is one of the simplest…
Structural, mechanical, and vibrational properties of particulate physical gels
Hideyuki Mizuno, Makoto Hachiya, Atsushi Ikeda
Our lives are surrounded by a rich assortment of disordered materials. In particular, glasses are well known as dense, amorphous materials, whereas gels exist in low-density, disor…
Computational simulations of the vibrational properties of glasses
Hideyuki Mizuno, Atsushi Ikeda
Glasses show vibrational properties that are markedly different to those of crystals which are known as phonons. For example, excess low-frequency modes (the so-called boson peak),…
Instantaneous Normal Modes Reveal Structural Signatures for the Herschel-Bulkley Rheology in Sheared Glasses
Norihiro Oyama, Hideyuki Mizuno, Atsushi Ikeda
The Herschel-Bulkley law, a universal constitutive relation, has been empirically known to be applicable to a vast range of soft materials, including sheared glasses. Although the…
Understanding the scaling of boson peak through insensitivity of elastic heterogeneity to bending rigidity in polymer glasses
Naoya Tomoshige, Shota Goto, Hideyuki Mizuno +3
Amorphous materials exhibit peculiar mechanical and vibrational properties, including non-affine elastic responses and excess vibrational states, i.e., the so-called boson peak. Fo…
Phase transition in the binary mixture of jammed particles with large size dispersity
Yusuke Hara, Hideyuki Mizuno, Atsushi Ikeda
It has been well established that particulate systems show the jamming transition and critical scaling behaviors associated with it. However, our knowledge is limited to (nearly) m…
Unified View of Avalanche Criticality in Sheared Glasses
Norihiro Oyama, Hideyuki Mizuno, Atsushi Ikeda
Plastic events in sheared glasses are considered an example of so-called avalanches, whose sizes obey a power-law probability distribution with the avalanche critical exponent .…
Structural and mechanical characteristics of sphere packings near the jamming transition: From fully amorphous to quasi-ordered structures
Hideyuki Mizuno, Kuniyasu Saitoh, Leonardo E. Silbert
Mechanically stable sphere packings are generated in three-dimensional space using the discrete element method, which span a wide range in structural order, ranging from fully amor…
Sound damping in frictionless granular materials: The interplay between configurational disorder and inelasticity
Kuniyasu Saitoh, Hideyuki Mizuno
We numerically investigate sound damping in a model of granular materials in two dimensions. We simulate evolution of standing waves in disordered frictionless disks and analyze th…
Intermittent rearrangements accompanying thermal fluctuations distinguish glasses from crystals
Hideyuki Mizuno, Hua Tong, Atsushi Ikeda +1
It is a persistent problem in condensed matter physics that glasses exhibit vibrational and thermal properties that are markedly different from those of crystals. While recent work…
Mechanical and Vibrational Properties of Three-Dimensional Dimer Packings Near the Jamming Transition
Kumpei Shiraishi, Hideyuki Mizuno, Atsushi Ikeda
We comprehensively study mechanical and vibrational properties of dimer packings in three-dimensional space with particular attention on critical scaling behaviors near the jamming…
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…
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…