136 citations · 1.4k across the 28 of their papers we have counts for
27 papers
Exciton-spin interactions in antiferromagnetic charge-transfer insulators
Tatsuya Kaneko, Yuta Murakami, Denis Golež +2
We derive exciton-spin interactions from a microscopic correlated model that captures important aspects of the physics of charge-transfer (CT) insulators to address magnetism assoc…
Atomically imprinted graphene plasmonic cavities
Brian S. Y. Kim, Aaron J. Sternbach, Min Sup Choi +17
Plasmon polaritons in van der Waals (vdW) materials hold promise for next-generation photonics. The ability to deterministically imprint spatial patterns of high carrier density in…
Infrared Plasmons Propagate through a Hyperbolic Nodal Metal
Yinming Shao, Aaron J. Sternbach, Brian S. Y. Kim +16
Metals are canonical plasmonic media at infrared and optical wavelengths, allowing one to guide and manipulate light at the nano-scale. A special form of optical waveguiding is aff…
Revealing the frequency-dependent oscillations in the nonlinear terahertz response induced by the Josephson current
Sijie Zhang, Zhiyuan Sun, Qiaomei Liu +11
Nonlinear responses of superconductors to intense terahertz radiation has been an active research frontier. Using terahertz pump-terahertz probe spectroscopy, we investigate the c-…
Snapshots of a light-induced metastable hidden phase driven by the collapse of charge order
Frank Y. Gao, Zhuquan Zhang, Zhiyuan Sun +6
Nonequilibrium hidden states, both transient and long-lived, provide a unique window into thermally inaccessible regimes of strong coupling between microscopic degrees of freedom i…
Graphene as a source of entangled plasmons
Zhiyuan Sun, D. N. Basov, M. M. Fogler
We analyze nonlinear optics schemes for generating pairs of quantum entangled plasmons in the terahertz-infrared range in graphene. We predict that high plasmonic field concentrati…
Exploring nonequilibrium phases of photo-doped Mott insulators with Generalized Gibbs ensembles
Yuta Murakami, Shintaro Takayoshi, Tatsuya Kaneko +4
Photo-excited strongly correlated systems can exhibit intriguing non-thermal phases, but the theoretical investigation of them poses significant challenges. In this work, we introd…
Second order Josephson effect in excitonic insulators
Zhiyuan Sun, Tatsuya Kaneko, Denis Golež +1
We show that in electron-hole bilayers with excitonic order arising from conduction and valence bands formed by atomic orbitals that have different parities, nonzero interlayer tun…
Bulk Photovoltaic Effect Driven by Collective Excitations in a Correlated Insulator
Tatsuya Kaneko, Zhiyuan Sun, Yuta Murakami +2
We investigate the bulk photovoltaic effect, which rectifies light into electric current, in a collective quantum state with correlation driven electronic ferroelectricity. We show…
Topological charge pumping in excitonic insulators
Zhiyuan Sun, Andrew J. Millis
We show that in excitonic insulators with -wave electron-hole pairing, an applied electric field (either pulsed or static) can induce a -wave component to the order parameter…
Nonlinear spectroscopy of collective modes in excitonic insulator
Denis Golez, Zhiyuan Sun, Yuta Murakami +2
The nonlinear optical response of an excitonic insulator coupled to lattice degrees of freedom is shown to depend in strong and characteristic ways on whether the insulating behavi…
Graphene/-RuCl: An Emergent 2D Plasmonic Interface
Daniel J. Rizzo, Bjarke S. Jessen, Zhiyuan Sun +16
Work function-mediated charge transfer in graphene/-RuCl heterostructures has been proposed as a strategy for generating highly-doped 2D interfaces. In this geometry, graphe…
Bardasis-Schrieffer polaritons in excitonic insulators
Zhiyuan Sun, Andrew J. Millis
Bardasis-Schrieffer modes in superconductors are fluctuations in subdominant pairing channels, e.g., d-wave fluctuations in an s-wave superconductor. This Rapid Communication shows…
Pump induced motion of an interface between competing orders
Zhiyuan Sun, Andrew J. Millis
We study the motion of an interface separating two regions with different electronic orders following a short duration pump that drives the system out of equilibrium. Using a gener…
Collective modes and terahertz near-field response of superconductors
Zhiyuan Sun, M. M. Fogler, D. N. Basov +1
We theoretically study the low energy electromagnetic response of BCS type superconductors focusing on propagating collective modes that are observable with THz near field optics.…
Transient trapping into metastable states in systems with competing orders
Zhiyuan Sun, Andrew J. Millis
The quench dynamics of a system involving two competing orders is investigated using a Ginzburg-Landau theory with relaxational dynamics. We consider the scenario where a pump rapi…
Photo-enhanced metastable c-axis electrodynamics in stripe ordered cuprate LaBaCuO
Kevin A. Cremin, Jingdi Zhang, Christopher C. Homes +6
Quantum materials are amenable to non-equilibrium manipulation with light, enabling modification and control of macroscopic properties. Light-based augmentation of superconductivit…
Optical Signatures of Dirac Nodal-lines in NbAs
Yinming Shao, Zhiyuan Sun, Ying Wang +10
Using polarized optical and magneto-optical spectroscopy, we have demonstrated universal aspects of electrodynamics associated with Dirac nodal-lines. We investigated anisotropic e…
Charge Separation at Mixed-Dimensional Single and Multilayer MoS2/Silicon Nanowire Heterojunctions
Alex Henning, Vinod K. Sangwan, Hadallia Bergeron +4
Layered two-dimensional (2-D) semiconductors can be combined with other low-dimensional semiconductors to form non-planar mixed-dimensional van der Waals (vdW) heterojunctions whos…
Template-assisted scalable nanowire networks
Martin Friedl, Kris Cerveny, Pirmin Weigele +15
Topological qubits based on Majorana fermions have the potential to revolutionize the emerging field of quantum computing by making information processing significantly more robust…
Third-order optical conductivity of an electron fluid
Zhiyuan Sun, D. N. Basov, M. M. Fogler
We derive the nonlinear optical conductivity of an isotropic electron fluid at frequencies below the interparticle collision rate. In this regime, governed by hydrodynamics, the co…
Nanoscale mapping and spectroscopy of non-radiative hyperbolic modes in hexagonal boron nitride nanostructures
Lisa V. Brown, Marcelo Davanco, Zhiyuan Sun +13
The inherent crystal anisotropy of hexagonal boron nitride (hBN) sustains naturally hyperbolic phonon polaritons, i.e. polaritons that can propagate with very large wavevectors wit…
Relative efficiency of polariton emission in two-dimensional materials
Siyuan Dai, Qiong Ma, Yafang Yang +15
We investigated emission and propagation of polaritons in a two dimensional van der Waals material hexagonal boron nitride (hBN). Our specific emphasis in this work is on hyperboli…
Universal linear and nonlinear electrodynamics of the Dirac fluid
Zhiyuan Sun, D. N. Basov, M. M. Fogler
A general relation is derived between the linear and second-order nonlinear ac conductivities of an electron system in the hydrodynamic regime of frequencies below the interparticl…