28 citations · 123 across the 19 of their papers we have counts for
20 papers
Non-vanishing of primitive cubic, quartic and sextic L-functions
Ziwei Hong
We establish lower bounds for the non-vanishing proportions of primitive cubic, quartic and sextic Dirichlet -functions over $\F_q[T]$ in the non-Kummer setting. Adapting trunca…
Absence of solid phase in dense amorphous active granular matter
Cunyuan Jiang
Solid phase of dense granular matter is inevitable because of jamming transition when the packing fraction or the pressure suffered is high enough. The experiment suggests that act…
Vibrational inhomogeneity in amorphous solids and its geometric features
Cunyuan Jiang
The dynamical response of amorphous solids is expected to be inhomogeneous due to the absence of translational symmetry, unlike in crystals. In this work, we use Green's function m…
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…
Can we build a transistor using vacancy-induced bound states in a topological insulator
Cunyuan Jiang
Topological insulators (TIs) have been considered as promising candidates for next generation of electronic devices due to their topologically protected quantum transport phenomena…
Designing atomic-scale resistive circuits in topological insulators through vacancy-induced localized modes
Cunyuan Jiang, Weicen Dong, Matteo Baggioli
We demonstrate that vacancies can induce topologically protected localized electronic excitations within the bulk of a topological insulator, and when sufficiently close, give rise…
Topological signatures of collective dynamics and turbulent-like energy cascades in apolar active granular
Zihan Zheng, Cunyuan Jiang, Yangrui Chen +2
Active matter refers to a broad class of non-equilibrium systems where energy is continuously injected at the level of individual ``particles". These systems exhibit emergent colle…
The anomalous density of states and quasi-localized vibration through homogeneous thermalization of an inhomogeneous elastic system
Cunyuan Jiang
Amorphous solids are dynamically inhomogeneous due to in lack of translational symmetry and hence exhibit vibrational properties different from crystalline solids with anomalous lo…
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…
Shaping the topology of twisted bilayer graphene via time-reversal symmetry breaking
Cunyuan Jiang, Matteo Baggioli, Qing-Dong Jiang
Symmetry breaking is an effective tool for tuning the transport and topological properties of 2D layered materials. Among these materials, twisted bilayer graphene (TBG) has emerge…
Dispersionless Flat Mode and Vibrational Anomaly in Active Brownian Vibrators Induced by String-like Dynamical Defects
Cunyuan Jiang, Zihan Zheng, Yangrui Chen +2
In recent years, active Brownian particles have emerged as a prominent model system for comprehending the behaviors of active matter, wherein particles demonstrate self-propelled m…
Phonons in stringlet-land and the boson peak
Cunyuan Jiang, Matteo Baggioli
Solid materials that deviate from the harmonic crystal paradigm exhibit characteristic anomalies in the specific heat and vibrational density of states (VDOS) with respect to Debye…
Experimental observation of gapped shear waves and liquid-like to gas-like dynamical crossover in active granular matter
Cunyuan Jiang, Zihan Zheng, Yangrui Chen +2
Unlike crystalline solids, liquids lack long-range order, resulting in diffusive shear fluctuations rather than propagating waves. Simulations predict that liquids exhibit a -ga…
Stringlet Excitation Model of the Boson Peak
Cunyuan Jiang, Matteo Baggioli, Jack F. Douglas
The boson peak (BP), a low-energy excess in the vibrational density of states over the Debye contribution, is often identified as a characteristic of amorphous solid materials. Des…
A quantitative theoretical model of the boson peak based on stringlet excitations
Cunyuan Jiang, Matteo Baggioli, Jack F. Douglas
The boson peak (BP), a low-energy excess in the vibrational density of states over the phonon Debye contribution, is usually identified as one of the distinguishing features betwee…
Correlation between optical phonon softening and superconducting in YBaCuO within -wave Eliashberg theory
Cunyuan Jiang, Giovanni A. Ummarino, Matteo Baggioli +2
We provide a mathematical description, based on d-wave Eliashberg theory, of the strong correlation between the experimentally observed softening of Raman modes associated with in-…
Engineering flat bands in twisted-bilayer graphene away from the magic angle with chiral optical cavities
Cunyuan Jiang, Matteo Baggioli, Qing-Dong Jiang
Twisted bilayer graphene (TBG) is a recently discovered two-dimensional superlattice structure which exhibits strongly-correlated quantum many-body physics, including strange metal…
Glassy heat capacity from overdamped phasons and a hypothetical phason-induced superconductivity in incommensurate structures
Cunyuan Jiang, Alessio Zaccone, Chandan Setty +1
Phasons are collective low-energy modes that appear in disparate condensed matter systems such as quasicrystals, incommensurate structures, fluctuating charge density waves, and Mo…
Constrains on s and d components of electron boson coupling constants in one band d wave Eliashberg theory for high Tc superconductors
Giovanni Alberto Ummarino
The phenomenology of overdoped high Tc superconductors can be described by a one band d wave Eliashberg theory where the mechanism of superconducting coupling is mediated by antife…
Possible enhancement of the superconducting due to sharp Kohn-like soft phonon anomalies
Cunyuan Jiang, Enrico Beneduce, Matteo Baggioli +2
Phonon softening is a ubiquitous phenomenon in condensed matter systems which is often associated with charge density wave (CDW) instabilities and anharmonicity. The interplay betw…