77 citations · 444 across the 19 of their papers we have counts for
19 papers
Ultra-critical Floquet Non-Fermi Liquid
Li-kun Shi, Oles Matsyshyn, Justin C. W. Song +1
We demonstrate that periodically driven Fermions coupled to simple bosonic baths have steady state occupations of Floquet Bloch bands that generically display non-analyticties at c…
The Floquet Fermi Liquid
Li-kun Shi, Oles Matsyshyn, Justin C. W. Song +1
We demonstrate the existence of a non-equilibrium "Floquet Fermi Liquid" state arising in partially filled Floquet Bloch bands weakly coupled to ideal fermionic baths, which posses…
The Fermi-Dirac staircase occupation of Floquet bands and current rectification inside the optical gap of metals: a rigorous perspective
Oles Matsyshyn, Justin C. W. Song, Inti Sodemann Villadiego +1
We consider a model of a Bloch band subjected to an oscillating electric field and coupled to a featureless fermionic heat bath, which can be solved exactly. We demonstrate rigorou…
The Berry dipole photovoltaic demon and the thermodynamics of photo-current generation within the optical gap of metals
Li-kun Shi, Oles Matsyshyn, Justin C. W. Song +1
We dismantle the previously held misconception that it is impossible for bulk rectification mechanisms to induce a net DC electric current when the frequency of the impinging radia…
Defect bulk-boundary correspondence of topological skyrmion phases of matter
Shu-Wei Liu, Li-kun Shi, Ashley M. Cook
Unpaired Majorana zero-modes are central to topological quantum computation schemes as building blocks of topological qubits, and are therefore under intense experimental and theor…
Polariton-drag enabled quantum geometric photocurrents in high symmetry materials
Ying Xiong, Li-kun Shi, Justin C. W. Song
Lowered symmetry enables access to a wide set of responses not typically accessible in high symmetry materials. Prime examples are time-reversal forbidden quantum geometric photocu…
Atomic configuration controlled photocurrent in van der Waals homostructures
Ying Xiong, Li-kun Shi, Justin C. W. Song
Conventional photocurrents at a p-n junction depend on macroscopic built-in fields and are typically insensitive to the microscopic details of a crystal's atomic configuration. Her…
Geometric photon-drag effect and nonlinear shift current in centrosymmetric crystals
Li-kun Shi, Dong Zhang, Kai Chang +1
The nonlinear shift current, also known as the bulk photovoltaic current generated by linearly polarized light, has long been known to be absent in crystals with inversion symmetry…
Cooperative orbital moments and edge magnetoresistance in monolayer WTe
Arpit Arora, Li-kun Shi, Justin C. W. Song
We argue that edge electrons in monolayer WTe can possess a "cooperative" orbital moment (COM) that critically impacts its edge magnetoresistance behavior. Arising from the coo…
Shift vector as the geometric origin of beam shifts
Li-kun Shi, Justin C. W. Song
Goos-Hanchen (GH) and Imbert-Fedorov (IF) shifts are lateral and transverse displacements of a wavepacket reflecting off a surface. A dramatic real-space manifestation of wavepacke…
Gate-tunable flat bands in van der Waals patterned dielectric superlattices
Li-kun Shi, Jing Ma, Justin C. W. Song
Superlattice engineering provides the means to reshape the fabric felt by quasiparticles moving in a material. Here we argue that bandstructure engineering with superlattices can b…
Non-trivial quantum oscillation geometric phase shift in a trivial band
Biswajit Datta, Pratap Chandra Adak, Li-kun Shi +4
The accumulation of non-trivial geometric phases in a material's response is often a tell-tale sign of a rich underlying internal structure. Studying quantum oscillations provides…
Fermi arc induced vortex structure in Weyl beam shifts
Udvas Chattopadhyay, Li-Kun Shi, Baile Zhang +2
In periodic media, despite the close relationship between geometrical effects in the bulk and topological surface states, the two are typically probed separately. We show that when…
Symmetry, spin-texture, and tunable quantum geometry in a WTe monolayer
Li-kun Shi, Justin C. W. Song
The spin orientation of electronic wavefunctions in crystals is an internal degree of freedom, typically insensitive to electrical knobs. We argue from a general symmetry analysis…
Plasmon geometric phase and plasmon Hall shift
Li-kun Shi, Justin C. W. Song
The collective plasmonic modes of a metal comprise a pattern of charge density and tightly-bound electric fields that oscillate in lock-step to yield enhanced light-matter interact…
Large optical conductivity of Dirac semimetal Fermi arc surfaces states
Li-kun Shi, Justin C. W. Song
Fermi arc surface states, a hallmark of topological Dirac semimetals, can host carriers that exhibit unusual dynamics distinct from that of their parent bulk. Here we find that Fer…
Entangled Terahertz Photon Emission from Topological Insulator Quantum Dots
Li-kun Shi, Kai Chang, Chang-Pu Sun
We propose an experimentally feasible scheme for generating entangled terahertz photon pairs in topological insulator quantum dots (TIQDs). We demonstrate theoretically that in gen…
Artificial Gauge Field and Quantum Spin Hall States in a Conventional Two-dimensional Electron Gas
Likun Shi, Wenkai Lou, F. Cheng +3
Based on the Born-Oppemheimer approximation, we divide total electron Hamiltonian in a spinorbit coupled system into slow orbital motion and fast interband transition process. We f…
Anomalous Electron Trajectory in Topological Insulators
Li-kun Shi, Shou-cheng Zhang, Kai Chang
We present a general theory about electron orbital motions in topological insulators. An in-plane electric field drives spin-up and spin-down electrons bending to opposite directio…