72 citations · 250 across the 22 of their papers we have counts for
22 papers
Effects on a metal that is proximately coupled to hyperbolic photon modes
Zhiyu Dong, Patrick A. Lee
The hyperbolic mode (HM) refers to a polariton mode in a polar insulator where the dielectric function is negative in some direction of propagation. Within a frequency window the l…
Effect of the hyperbolic photon mode on a proximate material
Zhiyu Dong, Patrick A. Lee
The hyperbolic mode (HM) refers to a polariton mode where the dielectric function is negative in some direction of propagation. Within a frequency window the light occupies a great…
Berry-Flux-Controlled Cascade of Chiral Superconducting States
Daniil Karuzin, Zhiyu Dong, Leonid Levitov
Motivated by recent interest in chiral superconductivity in narrow bands, we develop a general framework to clarify how band topology and quantum geometry affect superconducting pa…
Chirality-induced pseudo-magnetic fields, flat bands and enhancement of superconductivity
Zhiyu Dong, Leonid Levitov, Patrick A. Lee
Systems in which exchange interactions couple carrier spins to a spin texture with a net chirality exhibit a spin-dependent Aharonov-Bohm effect, where the geometric gauge field an…
Spin chirality and fermion stirring in topological bands
Archisman Panigrahi, Vladislav Poliakov, Zhiyu Dong +1
We demonstrate that in metals, both normal and superconducting, orbital currents present in the ground state when time reversal symmetry (TRS) is broken, generate spin chirality. N…
Superconductivity from spin-canting fluctuations in rhombohedral graphene
Zhiyu Dong, Étienne Lantagne-Hurtubise, Jason Alicea
Rhombohedral graphene multilayers host various broken-symmetry metallic phases as well as superconductors whose pairing mechanism and order parameter symmetry remain unsettled. Str…
Charge and spin density wave orders in field-biased Bernal bilayer graphene
Zhiyu Dong, Patrick A. Lee, Leonid Levitov
This paper aims to clarify the nature of a surprising ordered phase recently reported in biased Bernal bilayer graphene that occurs at the phase boundary between the isospin-polari…
Numerical evidence for spin chirality emerging from itinerant ferromagnets in bands with Berry curvature
Shuai Yang, Zhiyu Dong, Yan Chen
The behavior of strongly interacting electrons in bands with Berry curvature is a problem of wide interest. In this paper, we study this problem by numerically studying a fluxed Hu…
Interaction-driven (quasi-) insulating ground states of gapped electron-doped bilayer graphene
Anna M. Seiler, Martin Statz, Isabell Weimer +6
Bernal bilayer graphene has recently been discovered to exhibit a wide range of unique ordered phases resulting from interaction-driven effects and encompassing spin and valley mag…
Superconductivity near spin and valley orders in graphene multilayers: a systematic study
Zhiyu Dong, Leonid Levitov, Andrey V. Chubukov
Spin excitations that soften near the onset of magnetic order have long been known to act as `paramagnon' pairing glue that can drive spin-triplet superconductivity. Recent finding…
Collective excitations in chiral Stoner magnets
Zhiyu Dong, Olumakinde Ogunnaike, Leonid Levitov
We argue that spin and valley-polarized metallic phases recently observed in graphene bilayers and trilayers support chiral edge modes that allow spin waves to propagate ballistica…
Signatures of Cooper pair dynamics and quantum-critical superconductivity in tunable carrier bands
Zhiyu Dong, Patrick A. Lee, Leonid S. Levitov
Different superconducting pairing mechanisms are markedly distinct in the underlying Cooper pair kinematics. Pairing interactions mediated by quantum-critical soft modes are domina…
Chiral Stoner magnetism in Dirac bands
Zhiyu Dong, Leonid Levitov
Stoner magnetism in bands endowed with Berry curvature is shown to be profoundly influenced by the coupling between spin chirality density $\vec s\cdot(\partial_x\vec s\times\parti…
Spin-triplet superconductivity at the onset of isospin order in biased bilayer graphene
Zhiyu Dong, Andrey V. Chubukov, Leonid Levitov
The quest for unconventional superconductivity governed by Coulomb repulsion between electrons rather than phonon attraction received new momentum with the advent of moiré graphene…
Isospin and momentum polarized orders in bilayer graphene
Zhiyu Dong, Margarita Davydova, Olumakinde Ogunnaike +1
Electron bands in the untwisted bilayer graphene flatten out in a transverse electric field, offering a promising platform for correlated electron physics. We predict that the spin…
Superconductivity in the vicinity of an isospin-polarized state in a cubic Dirac band
Zhiyu Dong, Leonid Levitov
We present a theory of superconducting pairing originating from soft critical fluctuations near isospin-polarized states in rhombohedral trilayer graphene. Using a symmetry-based a…
Out-of-equilibrium criticalities in graphene superlattices
Alexey I. Berdyugin, Na Xin, Haoyang Gao +19
In thermodynamic equilibrium, current in metallic systems is carried by electronic states near the Fermi energy whereas the filled bands underneath contribute little to conduction.…
Activating superconductivity in a repulsive system by high-energy degrees of freedom
Zhiyu Dong, Leonid Levitov
We discuss superconducting pairing in a narrow conduction band sandwiched between unoccupied and occupied bands, an arrangement that enables an unconventional pairing mechanism gov…
Synchronizing Bloch-oscillating free carriers in moiré flat bands
Ali Fahimniya, Zhiyu Dong, Egor Kiselev +1
Achieving Bloch oscillations of free carriers under a direct current, a long-sought-after collective many-body behavior, has been challenging due to stringent constraints on the ba…
Plasmonic Drag in a Flowing Fermi Liquid
Haoyang Gao, Zhiyu Dong, Leonid Levitov
Collective modes in two-dimensional electron fluids show an interesting response to a background carrier flow. Surface plasmons propagating on top of a flowing Fermi liquid acquire…
Classical Dynamics of Harmonically Trapped Interacting Particles
Zhiyu Dong, R. Moessner, Masudul Haque
Motivated by current interest in the dynamics of trapped quantum gases, we study the microcanonical dynamics of a trapped one-dimensional gas of classical particles interacting via…
Bosonic Integer Quantum Hall States without Landau Levels on Square Lattice
Wanli Liu, Zhiyu Dong, Zhihuan Dong +3
We study an interacting two-component hard-core bosons on square lattice for which, in the presence of staggered magnetic flux, the ground state is a bosonic integer quantum Hall (…