Explanipedia

Photostriction-Driven Phase Transition in Layered Chiral NbOX$_2$ Crystals: Electrical-Field-Controlled Enantiomer Selectivity Open

Jorge Cardenas‐Gamboa, Martin Gutierrez‐Amigo, Aritz Leonardo, Gregory A. Fiete, Juan L. Mañes , et al. · 2025

Chiral crystals offer an unique platform for controlling structural handedness through external stimuli. However, the ability to select between structural enantiomers remains challenging, both theoretically and experimentally. In this work…

Spectrally sharp magnetic excitations above the critical temperature in a frustrated Weyl semimetal Open

Michael Terilli, Xun Jia, Xiaoran Liu, Pontus Laurell, Ana-Marija Nedić , et al. · 2025

Long-lived zone-boundary magnons in an antiferromagnet Open

Jeongheon Choe, David Lujan, Gaihua Ye, Cynthia Nnokwe, Bowen Ma , et al. · 2025

Origin of Large Effective Phonon Magnetic Moments in Monolayer MoS<sub>2</sub> Open

H. Mustafa, Cynthia Nnokwe, Gaihua Ye, Mengqi Fang, Swati Chaudhary , et al. · 2025

Recent helicity-resolved magneto-Raman spectroscopy measurement demonstrates large effective phonon magnetic moments of ∼2.5 μ_B in monolayer MoS₂, highlighting resonant excitation of bright excitons as a feasible rout…

Light-Induced Reorientation Transition in an Antiferromagnetic Semiconductor Open

Bryan T. Fichera, Baiqing Lv, Karna Morey, Zongqi Shen, Changmin Lee , et al. · 2025

Because of the lack of a net magnetic moment, antiferromagnets possess a unique robustness to external magnetic fields and are thus predicted to play an important role in future magnetic technologies. However, this robustness also makes th…

High-accuracy evaluation of non-thermal magnetic states beyond spin-wave theory: applications to higher-energy states Open

Wesley Roberts, Michael Vogl, Roderich Moessner, Gregory A. Fiete · 2025

We present an approximation scheme based on selective Hilbert space truncation for characterizing non-thermal states of magnetic systems beyond spin-wave theory. We study applications to states that are inaccessible through linear spin-wav…

Light-induced reorientation transition in an antiferromagnetic semiconductor Open

Bryan T. Fichera, Baiqing Lv, Karna Morey, Zongqi Shen, Changmin Lee , et al. · 2025

Due to the lack of a net magnetic moment, antiferromagnets possess a unique robustness to external magnetic fields and are thus predicted to play an important role in future magnetic technologies. However, this robustness also makes them q…

Metastability in Coexisting Competing Orders Open

Yasamin Masoumi Sefidkhani, Alberto de la Torre, Gregory A. Fiete · 2024

The dynamical phase transition of a system with two coexisting competing order parameters is studied using the time-dependent-Ginzburg-Landau framework. The dynamics are induced by parameters capturing the physics of driving the system wit…

Magnetic Order and Strain in Hexagonal Manganese Pnictide CaMn$_2$Bi$_2$ Open

R. H. Aguilera-del-Toro, Mikel Arruabarrena, Aritz Leonardo, Martin Rodriguez-Vega, Gregory A. Fiete , et al. · 2024

The manganese pnictide CaMn$_2$Bi$_2$, with Mn atoms arranged in a puckered honeycomb structure, exhibits narrow-gap antiferromagnetism, and it is currently a promising candidate for the study of complex electronic and magnetic phenomena, …

Magnetoelastic coupling driven magnon gap in a honeycomb antiferromagnet Open

Jeongheon Choe, Andrey Baydin, Gaihua Ye, Bowen Ma, Cynthia Nnokwe , et al. · 2024

Interlayer Dzyaloshinskii-Moriya interactions induced via non-linear phononics in bilayer van der Waals materials Open

Ze-Xun Lin, Bowen Ma, Wesley Roberts, Martin Rodriguez-Vega, Gregory A. Fiete · 2024

We theoretically study the impact of light-driven structural changes via nonlinear phononics on the magnetic order of untwisted bilayer van der Waals materials. We consider an illustrative example of the AA-stacked bilayer honeycomb lattic…

Nonlinear optical responses and quantum geometry in rhombohedral trilayer graphene Open

Abigail Postlewaite, Arpit Raj, Swati Chaudhary, Gregory A. Fiete · 2024

We theoretically study the nonlinear optical response of ABC trilayer graphene with inversion symmetry broken by the application of a displacement field perpendicular to the trilayer. We show that rhombohedral trilayer graphene exhibits a …

Self-consistent evaluation of proximity and inverse proximity effects with pair-breaking in diffusive SN junctions Open

Arpit Raj, Patrick A. Lee, Gregory A. Fiete · 2024

We consider a planar superconducting-normal-metal (SN) junction with both inelastic and spin-flip scattering processes present. In the diffusive limit, we use a one-dimensional formulation of the Usadel equation to compute the self-consist…

Geometric origin of the intrinsic transverse spin transport in a canted-antiferromagnet/heavy-metal heterostructure Open

Wesley Roberts, Bowen Ma, Martin Rodriguez-Vega, Gregory A. Fiete · 2024

We theoretically study the conditions under which an intrinsic spin Nernst effect–a transverse spin current induced by an applied temperature gradient–can occur in a canted-antiferromagnet insulator, such as LaFeO₃ and other mat…

Spin–orbit exciton–induced phonon chirality in a quantum magnet Open

David Lujan, Jeongheon Choe, Swati Chaudhary, Gaihua Ye, Cynthia Nnokwe , et al. · 2024

The interplay of charge, spin, lattice, and orbital degrees of freedom in correlated materials often leads to rich and exotic properties. Recent studies have brought new perspectives to bosonic collective excitations in correlated material…

Spin-resolved topology and partial axion angles in three-dimensional insulators Open

Kuan-Sen Lin, Giandomenico Palumbo, Zhaopeng Guo, Yoonseok Hwang, Jeremy Blackburn , et al. · 2024

Symmetry-protected topological crystalline insulators (TCIs) have primarily been characterized by their gapless boundary states. However, in time-reversal- ( $${{{{{{{\mathcal{T}}}}}}}}$$ -) invariant (helical) 3D TCIs—termed higher-orde…

Photogalvanic response in multi-Weyl semimetals Open

Arpit Raj, Swati Chaudhary, Gregory A. Fiete · 2024

We investigate the dependence of the photogalvanic response of a twofold degenerate multi-Weyl semimetal on its topological charge, tilt, and chemical potential. We derive analytical expressions for the shift and injection conductivities f…

Topological transverse spin transport in a canted antiferromagnet/heavy metal heterostructure Open

Wesley Roberts, Bowen Ma, Martin Rodriguez-Vega, Gregory A. Fiete · 2024

We theoretically study the conditions under which a spin Nernst effect - a transverse spin current induced by an applied temperature gradient - can occur in a canted antiferromagnetic insulator, such as ${\rm LaFeO_3}$ and other materials …

Observation of interplay between phonon chirality and electronic band topology Open

F. G. G. Hernández, Andrey Baydin, Swati Chaudhary, Fuyang Tay, Ikufumi Katayama , et al. · 2023

The recently demonstrated chiral modes of lattice motion carry angular momentum and therefore directly couple to magnetic fields. Notably, their magnetic moments are predicted to be strongly influenced by electronic contributions. Here, we…

Nonlinear optical responses in multi-orbital topological superconductors Open

Arpit Raj, Abigail Postlewaite, Swati Chaudhary, Gregory A. Fiete · 2023

We theoretically study first and second-order optical responses in a transition metal dichalcogenide monolayer with distinct trivial, nodal, and time-reversal invariant topological superconducting (TRITOPS) phases. We show that the second-…

Site-selective doublon-holon dynamics in a pumped one-dimensional Hubbard superlattice with staggered Coulomb interactions Open

Zhenyu Cheng, Ying Li, Hantao Lu, Xiang Hu, Zhongbing Huang , et al. · 2023

Doublon-holon dynamics is investigated in a pumped one-dimensional Hubbard model with a staggered on?site Coulomb interaction at half-filling. When the system parameters are set to be in the Mott insulating regime the equilibrium sublattic…

Giant effective magnetic moments of chiral phonons from orbit-lattice coupling Open

Swati Chaudhary, Dominik M. Juraschek, Martin Rodriguez-Vega, Gregory A. Fiete · 2023

Circularly polarized lattice vibrations carry angular momentum and lead to magnetic responses in applied magnetic fields or when resonantly driven with ultrashort laser pulses. Recent measurements have found responses that are orders of ma…

Observation of colossal terahertz magnetoresistance and magnetocapacitance in a perovskite manganite Open

Fuyang Tay, Swati Chaudhary, Jiaming He, Nicolás Márquez Peraca, Andrey Baydin , et al. · 2023

Terahertz (THz) magnetoresistance effects have been extensively investigated and have shown promising results for applications in magnetic modulations of the amplitude of THz waves. However, THz magnetocapacitance in dielectric systems, wh…

Observation of Colossal Terahertz Magnetoresistance and Magnetocapacitance in a Perovskite Manganite Open

Fuyang Tay, Swati Chaudhary, Jiaming He, Nicolás Márquez Peraca, Andrey Baydin , et al. · 2023

We have studied the terahertz response of a bulk single crystal of La$_{0.875}$Sr$_{0.125}$MnO$_3$ at around its Curie temperature, observing large changes in the real and imaginary parts of the optical conductivity as a function of magnet…

Photogalvanic response in multi-Weyl semimetals Open

Arpit Raj, Swati Chaudhary, Gregory A. Fiete · 2023

We investigate the dependence of the photogalvanic response of a multi-Weyl semimetal on its topological charge, tilt, and chemical potential. We derive analytical expressions for the shift and injection conductivities for tilted charge-$n…

Impact of clustering of substitutional impurities on quasiparticle lifetimes and localization Open

Jack G. Nedell, Michael Vogl, Gregory A. Fiete · 2023

Motivated by the observation and prediction of clustering behavior for impurities substituted into the host lattice of a real material, and the dramatic impact this can have on electronic properties, we develop a simple approach to describ…

Quench dynamics in the one-dimensional mass-imbalanced ionic Hubbard model Open

Zhuotao Xie, Ming Zhao, Hantao Lu, Zhongbing Huang, Gregory A. Fiete , et al. · 2022

Using the time-dependent Lanczos method, we study the non-equilibrium dynamics of the one-dimensional ionic-mass imbalanced Hubbard chain driven by a quantum quench of the on-site Coulomb interaction, where the system is prepared in the gr…

Chiral Phonons with Giant Magnetic Moments in a Topological Crystalline Insulator Open

F. G. G. Hernández, Andrey Baydin, Swati Chaudhary, Fuyang Tay, Ikufumi Katayama , et al. · 2022

We have studied the magnetic response of transverse optical phonons in Pb$_{1-x}$Sn$_{x}$Te films. Polarization-dependent terahertz magnetospectroscopy measurements revealed Zeeman splittings and diamagnetic shifts, demonstrating that thes…

Fidelity of the Kitaev honeycomb model under a quench Open

Wesley Roberts, Michael Vogl, Gregory A. Fiete · 2022

Motivated by rapid developments in the field of quantum computing and the increasingly diverse nature of qubits, we theoretically study the influence that quenched outside disturbances have in an intermediately long time limit. We consider…

Spin-Resolved Topology and Partial Axion Angles in Three-Dimensional Insulators Open

Kuan-Sen Lin, Giandomenico Palumbo, Zhaopeng Guo, Yoonseok Hwang, Jeremy Blackburn , et al. · 2022

Symmetry-protected topological crystalline insulators (TCIs) have primarily been characterized by their gapless boundary states. However, in time-reversal- ($\mathcal{T}$-) invariant (helical) 3D TCI$\unicode{x2014}$termed higher-order TCI…

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