Chen-Di Han
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View article: Deep-learning design of electronic metasurfaces in graphene for quantum control and Dirac electron holography
Deep-learning design of electronic metasurfaces in graphene for quantum control and Dirac electron holography Open
Metasurfaces are sub-wavelength patterned layers for controlling waves in physical systems. In optics, metasurfaces are created by materials with different dielectric constants and are capable of unconventional functionalities. We develop …
View article: Optical properties of two-dimensional Dirac–Weyl materials with a flatband
Optical properties of two-dimensional Dirac–Weyl materials with a flatband Open
The emergence of a flatband in Dirac–Weyl materials offers new possibilities for electronic transitions, leading to stronger interaction with light. As a result, the optical conductivity can be significantly enhanced in these flatband mate…
View article: Spin-dependent edge states in two-dimensional Dirac materials with a flat band
Spin-dependent edge states in two-dimensional Dirac materials with a flat band Open
The phenomenon of spin-dependent quantum scattering in two-dimensional (2D)\npseudospin-1/2 Dirac materials leading to a relativistic quantum chimera was\nrecently uncovered. We investigate spin-dependent Dirac electron optics in 2D\npseud…
View article: Generating extreme quantum scattering in graphene with machine learning
Generating extreme quantum scattering in graphene with machine learning Open
Graphene quantum dots provide a platform for manipulating electron behaviors\nin two-dimensional (2D) Dirac materials. Most previous works were of the\n"forward" type in that the objective was to solve various confinement,\ntransport and s…
View article: Generating extreme quantum scattering in graphene with machine learning
Generating extreme quantum scattering in graphene with machine learning Open
Graphene quantum dots provide a platform for manipulating electron behaviors in two-dimensional (2D) Dirac materials. Most previous works were of the "forward" type in that the objective was to solve various confinement, transport and scat…
View article: Geometry-induced wave-function collapse
Geometry-induced wave-function collapse Open
When a quantum particle moves in a curved space, a geometric potential can\narise. In spite of a long history of extensive theoretical studies, to\nexperimentally observe the geometric potential remains to be a challenge. What\nare the phy…
View article: Optical response of two-dimensional Dirac materials with a flat band
Optical response of two-dimensional Dirac materials with a flat band Open
Two-dimensional Dirac materials with a flat band have been demonstrated to\npossess a plethora of unusual electronic properties, but the optical properties\nof these materials are less studied. Utilizing $\\alpha$-$\\mathcal{T}_3$ lattice\…
View article: Adaptable Hamiltonian neural networks
Adaptable Hamiltonian neural networks Open
The rapid growth of research in exploiting machine learning to predict chaotic systems has revived a recent interest in Hamiltonian neural networks (HNNs) with physical constraints defined by Hamilton's equations of motion, which represent…
View article: Tomography of time-dependent quantum spin networks with machine learning
Tomography of time-dependent quantum spin networks with machine learning Open
Interacting spin networks are fundamental to quantum computing. Data-based tomography of time-independent spin networks has been achieved, but an open challenge is to ascertain the structures of time-dependent spin networks using time seri…
View article: Pseudospin modulation in coupled graphene systems
Pseudospin modulation in coupled graphene systems Open
The ability to manipulate pseudospin can find applications in Dirac-material based spintronics. Unlike the transport of real spin that can be modulated by a magnetic field, some form of magnetization, or a spin-transfer torque, pseudospin …
View article: Electrical confinement in a spectrum of two-dimensional Dirac materials with classically integrable, mixed, and chaotic dynamics
Electrical confinement in a spectrum of two-dimensional Dirac materials with classically integrable, mixed, and chaotic dynamics Open
An emergent class of two-dimensional Dirac materials is α-T_{3} lattices that can be realized by adding an atom at the center of each unit cell of a lattice with T_{3} symmetry. The interaction strength α between this atom and any of its n…