453 citations · 2.4k across the 29 of their papers we have counts for
29 papers
Orbital Multiferroicity in Pentalayer Rhombohedral Graphene
Tonghang Han, Zhengguang Lu, Giovanni Scuri +8
Ferroic orders describe spontaneous polarization of spin, charge, and lattice degrees of freedom in materials. Materials featuring multiple ferroic orders, known as multiferroics,…
Correlated Insulator and Chern Insulators in Pentalayer Rhombohedral Stacked Graphene
Tonghang Han, Zhengguang Lu, Giovanni Scuri +7
Rhombohedral stacked multilayer graphene is an ideal platform to search for correlated electron phenomena, due to its pair of flat bands touching at zero energy and further tunabil…
Thickness and twist angle dependent interlayer excitons in metal monochalcogenide heterostructures
Wenkai Zheng, Li Xiang, Felipe de Quesada +18
Interlayer excitons, or bound electron-hole pairs whose constituent quasiparticles are located in distinct stacked semiconducting layers, are being intensively studied in heterobil…
Light sources with bias tunable spectrum based on van der Waals interface transistors
Hugo Henck, Diego Mauro, Daniil Domaretskiy +13
Light-emitting electronic devices are ubiquitous in key areas of current technology, such as data communications, solid-state lighting, displays, and optical interconnects. Control…
Weyl Fermion Magneto-Electrodynamics and Ultra-low Field Quantum Limit in TaAs
Zhengguang Lu, Patrick Hollister, Mykhaylo Ozerov +6
Topological semimetals are predicted to exhibit unconventional electrodynamics, but a central experimental challenge is singling out the contributions from the topological bands. T…
Magnetic field tuning of crystal field levels and vibronic states in Spin-ice HoTiO observed in far-infrared reflectometry
Mykhaylo Ozerov, Naween Anand, L. J. van de Burgt +5
Low temperature optical spectroscopy in applied magnetic fields provides clear evidence of magnetoelastic coupling in the spin ice material HoTiO. In far-IR reflectomet…
Electrically controlled emission from singlet and triplet exciton species in atomically thin light emitting diodes
Andrew Y. Joe, Luis A. Jauregui, Kateryna Pistunova +15
Excitons are composite bosons that can feature spin singlet and triplet states. In usual semiconductors, without an additional spin-flip mechanism, triplet excitons are extremely i…
Symmetry-resolved two-magnon excitations in a strong spin-orbit-coupled bilayer antiferromagnet
Siwen Li, Elizabeth Drueke, Zach Porter +7
We used a combination of polarized Raman spectroscopy and spin wave calculations to study magnetic excitations in the strong spin-orbit-coupled (SOC) bilayer perovskite antiferroma…
Spin-Induced Linear Polarization of Excitonic Emission in Antiferromagnetic van der Waals Crystals
Xingzhi Wang, Jun Cao, Zhengguang Lu +8
Antiferromagnets display enormous potential in spintronics owing to its intrinsic nature, including terahertz resonance, multilevel states, and absence of stray fields. Combining w…
Gate-tunable exciton-polaron Rydberg series with strong roton effect
Erfu Liu, Jeremiah van Baren, Zhengguang Lu +5
The electronic exciton polaron is a hypothetical many-body quasiparticle formed by an exciton dressed with a polarized electron-hole cloud in the Fermi sea (FS). It is predicted to…
Giant Valley-Zeeman Splitting from Spin-Singlet and Spin-Triplet Interlayer Excitons in WSe2/MoSe2 Heterostructure
Tianmeng Wang, Shengnan Miao, Zhipeng Li +9
Transition metal dichalcogenides (TMDCs) heterostructure with a type II alignment hosts unique interlayer excitons with the possibility of spin-triplet and spin-singlet states. How…
Electrically controlled emission from triplet charged excitons in atomically thin heterostructures
Andrew Y. Joe, Luis A. Jauregui, Kateryna Pistunova +15
Excitons are composite bosons that can feature spin singlet and triplet states. In usual semiconductors, without an additional spin-flip mechanism, triplet excitons are extremely i…
Momentum-Dark Intervalley Exciton in Monolayer Tungsten Diselenide Brightened via Chiral Phonon
Zhipeng Li, Tianmeng Wang, Chenhao Jin +13
Inversion symmetry breaking and three-fold rotation symmetry grant the valley degree of freedom to the robust exciton in monolayer transition metal dichalcogenides (TMDCs), which c…
Probing the Electronic Structure of Graphene Near and Far from the Fermi Level via Planar Tunneling Spectroscopy
John L. Davenport, Zhehao Ge, Junyan Liu +12
Scanning tunneling spectroscopy (STS) has yielded significant insight on the electronic structure of graphene and other two-dimensional (2D) materials. STS directly measures a fund…
Valley and Zeeman Splittings in Multilayer Epitaxial Graphene Revealed by Circular Polarization Resolved Magneto-infrared Spectroscopy
Y. Jiang, Z. Lu, J. Gigliotti +7
Circular polarization resolved magneto-infrared studies of multilayer epitaxial graphene (MEG) are performed using tunable quantum cascade lasers in high magnetic fields up to 17.5…
Direct Observation of Gate Tunable Dark Trions in Monolayer WSe2
Zhipeng Li, Tianmeng Wang, Zhengguang Lu +11
Spin-forbidden intravalley dark exciton in tungsten-based transition metal dichalcogenides (TMDCs), owing to its unique spin texture and long lifetime, has attracted intense resear…
Exciton valley depolarization in monolayer transition-metal dichalcogenides
Min Yang, Cedric Robert, Zhengguang Lu +4
The valley degree of freedom is a sought-after quantum number in monolayer transition-metal dichalcogenides. Similar to optical spin orientation in semiconductors, the helicity of…
Melting of charge order in the low-temperature state of an electronic ferroelectric
Nora M. Hassan, Komalavalli Thirunavukkuarasu, Zhengguang Lu +5
Strong electronic interactions can drive a system into a state with a symmetry breaking. Lattice frustration or competing interactions tend to prevent a symmetry breaking, leading…
Magnetic field mixing and splitting of bright and dark excitons in monolayer MoSe2
Zhengguang Lu, Daniel Rhodes, Zhipeng Li +9
Monolayers of semiconducting transition metal dichalcogenides (TMDCs) with unique spin-valley contrasting properties and remarkably strong excitonic effects continue to be a subjec…
Emerging Photoluminescence from the Dark-Exciton Phonon Replica in Monolayer WSe2
Zhipeng Li, Tianmeng Wang, Chenhao Jin +13
Tungsten-based monolayer transition metal dichalcogenides host a long-lived dark exciton, an electron-hole pair in a spin-triplet configuration. The long lifetime and unique spin p…
Enhanced Optoelectronic Response in Bilayer Lateral Heterostructures of Transition Metal Dichalcogenides
Prasana K. Sahoo, Shahriar Memaran, Yan Xin +8
Two-dimensional lateral heterojunctions are basic components for low-power and flexible optoelectronics. In contrast to monolayers, devices based on few-layer lateral heterostructu…
Luminescent emission of excited Rydberg excitons from monolayer WSe2
Shao-Yu Chen, Zhengguang Lu, Thomas Goldstein +11
We report the experimental observation of radiative recombination from Rydberg excitons in a two-dimensional semiconductor, monolayer WSe2, encapsulated in hexagonal boron nitride.…
Gate tunable dark trions in monolayer WSe
Erfu Liu, Jeremiah van Baren, Zhengguang Lu +5
We report the observation and gate manipulation of intrinsic dark trions in monolayer WSe. By using ultraclean WSe devices encapsulated by boron nitride, we directly resolv…
Revealing the Biexciton and Trion-exciton Complexes in BN Encapsulated WSe2
Zhipeng Li, Tianmeng Wang, Zhengguang Lu +9
Strong Coulomb interactions in single-layer transition metal dichalcogenides (TMDs) result in the emergence of strongly bound excitons, trions and biexcitons. These excitonic compl…