33 citations · 93 across the 8 of their papers we have counts for
8 papers
A flat-band perspective on the boson peak in amorphous solids
Shivam Mahajan, Long-Zhou Huang, Cunyuan Jiang +4
The boson peak is a characteristic anomaly of amorphous solids broadly defined as a low-energy excess in the density of states and heat capacity compared to the textbook prediction…
Revealing the Geometrical and Vibrational Properties of the Defects Driving the Boson Peak
Shivam Mahajan, Darryl Seow Yang Han, Cunyuan Jiang +2
In amorphous solids, the vibrational density of states shows an excess of modes over the Debye model, known as the boson peak, whose origin remains unclear. Studies suggest a link…
Heterogeneous attenuation of sound waves in three-dimensional amorphous solids
Shivam Mahajan, Massimo Pica Ciamarra
Sound waves are attenuated as they propagate in amorphous materials. We investigate the mechanism driving sound attenuation in the Rayleigh scattering regime by resolving the dynam…
Quasi-localized vibrational modes, Boson peak and sound attenuation in model mass-spring networks
Shivam Mahajan, Massimo Pica Ciamarra
We introduce an algorithm that constructs disordered mass-spring networks whose elastic properties mimic that of glasses by tuning the fluctuations of the local elastic properties,…
Unifying description of the vibrational anomalies of amorphous materials
Shivam Mahajan, Massimo Pica Ciamarra
The vibrational density of states of solids controls their thermal and transport properties. In crystals, the low-frequency modes are extended phonons distributed in frequen…
Emergence of linear isotropic elasticity in amorphous and polycrystalline materials
Shivam Mahajan, Joyjit Chattoraj, Massimo Pica Ciamarra
We investigate the emergence of isotropic linear elasticity in amorphous and polycrystalline solids, via extensive numerical simulations. We show that the elastic properties are co…
Designing Phononic Band Gaps with Sticky Potentials
Yuanjian Zheng, Shivam Mahajan, Joyjit Chattoraj +1
Spectral gaps in the vibrational modes of disordered solids are key design elements in the synthesis and control of phononic metamaterials that exhibit a plethora of novel elastic…
Reverse Janssen effect in narrow granular columns
Shivam Mahajan, Michael Tennenbaum, Sudhir N. Pathak +6
When grains are added to a cylinder, the weight at the bottom is smaller than the total weight of the column, which is partially supported by the lateral walls through wall/grain f…