53 citations · 75 across the 9 of their papers we have counts for
10 papers
Direct observation of phonon mode with an antisymmetric Raman tensor
Shangfei Wu, Shang Ren, Kai Du +4
Phonon angular momentum, characterized by circular or elliptical motion of atoms, plays a decisive role in diverse phenomena, ranging from the phonon Hall effect, phonon magnetic m…
Magnetic quantum defects in a uniaxial antiferromagnetic insulator
Shangfei Wu, Laur Peedu, Zhihao Wang +12
Point defects have been successfully utilized in various quantum technologies, serving as quantum qubits for quantum computation, single-photon emitters for quantum communication,…
Polar enhancement of optical nonlinearities and domain-driven second harmonic contrast in bismuth telluro-halide van der Waals crystals
Kevin W. C. Kwock, Tenzin Norden, Thomas P. Darlington +11
The BiTeX family of polar van der Waals (vdW) semiconductors offers a unique platform for exploring the interplay between polar crystalline structure and nonlinear optical phenomen…
Electrotoroidicity: New Paradigm for Transverse Electromagnetic Responses
Kai Du, Daegeun Jo, Xianghan Xu +7
The exploration of transverse electromagnetic responses in solids with broken spatial-inversion (I) and/or time-reversal (T) symmetries has unveiled numerous captivating phenomena,…
Topological Magneto-optical Kerr Effect without Spin-orbit Coupling in Spin-compensated Antiferromagnet
Camron Farhang, Weihang Lu, Kai Du +4
The magneto-optical Kerr effect (MOKE), the differential reflection of oppositely circularly polarized light, has traditionally been associated with relativistic spin-orbit couplin…
Universal Superconductivity in FeTe and All-Iron-Based Ferromagnetic Superconductor Heterostructures
Hee Taek Yi, Xiong Yao, Deepti Jain +10
Ferromagnetism (FM) and superconductivity (SC) are two of the most famous macroscopic quantum phenomena. However, nature normally does not allow SC and FM to coexist without signif…
Directionally asymmetric nonlinear optics in planar chiral MnTiO
Xinshu Zhang, Tyler Carbin, Kai Du +7
Planar chiral structures possess a two dimensional handedness that is associated with broken mirror symmetry. Such motifs span vast length scales; examples include certain pinwheel…
Giant X-ray circular dichroism in a time-reversal invariant altermagnet
Jun Okamoto, Ru-Pan Wang, Yen-Yi Chu +13
X-ray circular dichroism, arising from the contrast in X-ray absorption between opposite photon helicities, serves as a spectroscopic tool to measure the magnetization of ferromagn…
Hydrogen-induced tunable remanent polarization in a perovskite nickelate
Yifan Yuan, Michele Kotiuga, Tae Joon Park +18
Materials with field-tunable polarization are of broad interest to condensed matter sciences and solid-state device technologies. Here, using hydrogen (H) donor doping, we modify t…
Permutable SOS (Symmetry Operational Similarity)
Sang-Wook Cheong, Seongjoon Lim, Kai Du +1
Based on symmetry consideration, quasi-one-dimensional (1D) objects, relevant to numerous observables or phenomena, can be classified into eight different types. We provide various…