197 citations · 939 across the 30 of their papers we have counts for
17 papers · 1 filter
Evolution of electronic and magnetic properties of SrIrO under strain
Ekaterina M. Parschke, Wei-Chih Chen, Rajyavardhan Ray +1
Motivated by properties-controlling potential of the strain, we investigate strain dependence of structure, electronic and magnetic properties of SrIrO using complementary…
Lattice frustration in spin-orbit Mott insulator Sr3Ir2O7 at high pressure
Jianbo Zhang, Dayu Yan, Sorb Yesudhas +13
The intertwined charge, spin, orbital, and lattice degrees of freedom could endow 5d compounds with exotic properties. Current interest is focused on electromagnetic interactions i…
Numerical Investigation of Spin Excitations in a Doped Spin Chain
Ekaterina M. Pärschke, Yao Wang, Brian Moritz +3
We study the doping evolution of spin excitations in a 1D Hubbard model and its downfolded spin Hamiltonians, by using exact diagonalization combined with cluster perturbation theo…
Evidence for a strain tuned topological phase transition in ZrTe5
Joshua Mutch, Wei-Chih Chen, Preston Went +5
A phase transition between topologically distinct insulating phases involves closing and reopening of the bandgap. Close to this topological phase transition, the bulk energy spect…
Theory of Time-Resolved Raman Scattering in Correlated Systems: Ultrafast Engineering of Spin Dynamics and Detection of Thermalization
Yao Wang, Thomas P. Devereaux, Cheng-Chien Chen
Ultrafast characterization and control of many-body interactions and elementary excitations are critical to understanding and manipulating emergent phenomena in strongly correlated…
Influence of Magnetism and Correlation on the Spectral Properties of Doped Mott Insulators
Yao Wang, Brian Moritz, Cheng-Chien Chen +2
Unravelling the nature of doping-induced transition between a Mott insulator and a weakly correlated metal is crucial to understanding novel emergent phases in strongly correlated…
Light-Enhanced Spin Fluctuations and d-Wave Superconductivity at a Phase Boundary
Yao Wang, Cheng-Chien Chen, B. Moritz +1
Time-domain techniques have shown the potential of photo-manipulating existing orders and inducing new states of matter in strongly correlated materials. Using time-resolved exact…
Pressure-Induced Confined Metal from the Mott Insulator Sr3Ir2O7
Yang Ding, Liuxiang Yang, Cheng-Chien Chen +12
The spin-orbit Mott insulator Sr3Ir2O7 provides a fascinating playground to explore insulator-metal transition driven by intertwined charge, spin, and lattice degrees of freedom. H…
Fermionic Symmetry-Protected Topological Phase in a Two-Dimensional Hubbard Model
Cheng-Chien Chen, Lukas Muechler, Roberto Car +2
We study the two-dimensional (2D) Hubbard model using exact diagonalization for spin-1/2 fermions on the triangular and honeycomb lattices decorated with a single hexagon per site.…
The many faces of quantum kagome materials: Interplay of further-neighbour exchange and Dzyaloshinskii-Moriya interaction
Tsezar F. Seman, Cheng-Chien Chen, Rajiv R. P. Singh +1
The field of frustrated magnetism has been enriched significantly by the discovery of various kagome lattice compounds. These materials exhibit a great variety of macroscopic behav…
Origin of Strong Dispersion in Hubbard Insulators
Yao Wang, Krzysztof Wohlfeld, Brian Moritz +5
Using cluster perturbation theory, we explain the origin of the strongly dispersive feature found at high binding energy in the spectral function of the Hubbard model. By comparing…
Spin chain in magnetic field: limitations of the large-N mean-field theory
Krzysztof Wohlfeld, Cheng-Chien Chen, Michel van Veenendaal +1
Motivated by the recent success in describing the spin and orbital spectrum of a spin-orbital chain using a large-N mean-field approximation [Phys. Rev. B 91, 165102 (2015)], we ap…
Fractionalization, entanglement, and separation: understanding the collective excitations in a spin-orbital chain
Cheng-Chien Chen, Michel van Veenendaal, Thomas P. Devereaux +1
Using a combined analytical and numerical approach, we study the collective spin and orbital excitations in a spin-orbital chain under a crystal field. Irrespective of the crystal…
A Novel High-Pressure Monoclinic Metallic Phase of V2O3
Yang Ding, Cheng-Chien Chen, Qiaoshi Zeng +11
Vanadium sesquioxide, V2O3, is a prototypical metal-to-insulator system where, in temperature-dependent studies, the transition always coincides with a corundum-to-monoclinic struc…
Time-Dependent Charge-Order and Spin-Order Recovery in Striped Systems
Y. F. Kung, W. -S. Lee, C. -C. Chen +4
Using time-dependent Ginzburg-Landau theory, we study the role of amplitude and phase fluctuations in the recovery of charge and spin stripe phases in response to a pump pulse that…
Phase transitions in spin-orbital models with spin-space anisotropies for iron-pnictides: A study through Monte Carlo simulations
Ryan Applegate, Rajiv R. P. Singh, Cheng-Chien Chen +1
The common phase diagrams of superconducting iron pnictides show interesting material specificities in the structural and magnetic phase transitions. In some cases the two transiti…
High pressure evolution of FeO electronic structure revealed by X-ray absorption
Shibing Wang, Wendy L. Mao, Adam P. Sorini +9
We report the first high pressure measurement of the Fe K-edge in hematite (FeO) by X-ray absorption spectroscopy in partial fluorescence yield geometry. The pressure-induc…