218 citations · 1.3k across the 18 of their papers we have counts for
18 papers
Dimensionality crossover to 2D vestigial nematicity from 3D zigzag antiferromagnetism in an XY-type honeycomb van der Waals magnet
Zeliang Sun, Gaihua Ye, Mengqi Huang +12
Fluctuations and disorder effects are substantially enhanced in reduced dimensionalities. While they are mostly considered as the foe for long-range orders, fluctuations and disord…
Evidence of Noncollinear Spin Texture in Magnetic Moiré Superlattices
Hongchao Xie, Xiangpeng Luo, Zhipeng Ye +9
Moiré magnetism, parallel with moiré electronics that has led to novel correlated and topological electronic states, emerges as a new venue to design and control exotic magnetic ph…
Structural Monoclinicity and Its Coupling to Layered Magnetism in Few-Layer
Xiaoyu Guo, Wencan Jin, Zhipeng Ye +13
Using polarization-resolved Raman spectroscopy, we investigate layer number, temperature, and magnetic field dependence of Raman spectra in one- to four-layer . L…
Twist engineering of the two-dimensional magnetism in double bilayer chromium triiodide homostructures
Hongchao Xie, Xiangpeng Luo, Gaihua Ye +12
Twist engineering, or the alignment of two-dimensional (2D) crystalline layers with desired orientations, has led to tremendous success in modulating the charge degree of freedom i…
Tunable layered-magnetism-assisted magneto-Raman effect in a two-dimensional magnet
Wencan Jin, Zhipeng Ye, Xiangpeng Luo +13
We use a combination of polarized Raman spectroscopy experiment and model magnetism-phonon coupling calculations to study the rich magneto-Raman effect in the two-dimensional (2D)…
Fermion-boson many-body interplay in a frustrated kagome paramagnet
J. -X. Yin, Nana Shumiya, Sougata Mardanya +22
Kagome-net, appearing in areas of fundamental physics, materials, photonic and cold-atom systems, hosts frustrated fermionic and bosonic excitations. However, it is extremely rare…
Observation of the polaronic character of excitons in a two-dimensional semiconducting magnet
Wencan Jin, Hyun Ho Kim, Zhipeng Ye +15
Exciton dynamics can be strongly affected by lattice vibrations through electron-phonon coupling. This is rarely explored in two-dimensional magnetic semiconductors. Focusing on bi…
Magnetic field-induced quantum phase transitions in a van der Waals magnet
Siwen Li, Zhipeng Ye, Xiangpeng Luo +10
Exploring new parameter regimes to realize and control novel phases of matter has been a main theme in modern condensed matter physics research. The recent discovery of 2D magnetis…
Stacking-Dependent Interlayer Phonons in 3R and 2H MoS
Jeremiah van Baren, Gaihua Ye, Jia-An Yan +6
We have investigated the interlayer shear and breathing phonon modes in MoS with pure 3R and 2H stacking order by using polarization-dependent ultralow-frequency Raman spectr…
Raman Spectroscopy of Diesel and Gasoline Engine-Out Soot Using Different Laser Power
Haiwen Ge, Zhipeng Ye, Rui He
We studied engine-out soot samples collected from a heavy-duty direct-injection diesel engine and a port-fuel injection gasoline spark-ignition engine. The two types of soot sample…
Raman fingerprint of two terahertz spin wave branches in a two-dimensional honeycomb Ising ferromagnet
Wencan Jin, Hyun Ho Kim, Zhipeng Ye +13
Two-dimensional (2D) magnetism has been long sought-after and only very recently realized in atomic crystals of magnetic van der Waals materials. So far, a comprehensive understand…
Dimensionality-driven orthorhombic MoTe2 at room temperature
Rui He, Shazhou Zhong, Hyun Ho Kim +9
We use a combination of Raman spectroscopy and transport measurements to study thin flakes of the type-II Weyl semimetal candidate MoTe2 protected from oxidation. In contrast to bu…
Interlayer breathing and shear modes in NbSe2 atomic layers
Rui He, Jeremiah van Baren, Jia-An Yan +6
Atomically thin NbSe2 is a metallic layered transition metal dichalcogenide (TMD) with considerably different crystallographic structure and electronic properties from other TMDs,…
Distinct surface and bulk charge density waves in ultrathin 1T-TaS2
Rui He, Junichi Okamoto, Zhipeng Ye +10
We employ low-frequency Raman spectroscopy to study the nearly commensurate (NC) to commensurate (C) charge density wave (CDW) transition in 1T-TaS2 ultrathin flakes protected from…
Coupling and stacking order of ReS2 atomic layers revealed by ultralow-frequency Raman spectroscopy
Rui He, Jia-An Yan, Zongyon Yin +5
We investigate the ultralow-frequency Raman response of atomically thin ReS2, a special type of two-dimensional (2D) semiconductors with unique distorted 1T structure. Bilayer and…
Observation of interlayer phonon modes in van der Waals heterostructures
Chun Hung Lui, Zhipeng Ye, Chao Ji +9
We have investigated the vibrational properties of van der Waals heterostructures of monolayer transition metal dichalcogenides (TMDs), specifically MoS2/WSe2 and MoSe2/MoS2 hetero…
Stacking-dependent shear modes in trilayer graphene
Chun Hung Lui, Zhipeng Ye, Courtney Keiser +2
We observed distinct interlayer shear mode Raman spectra for trilayer graphene with ABA and ABC stacking order. There are two rigid-plane shear-mode phonon branches in trilayer gra…
Temperature-activated layer-breathing vibrations in few-layer graphene
Chun Hung Lui, Zhipeng Ye, Courtney Keiser +2
We investigated the low-frequency Raman spectra of freestanding few-layer graphene (FLG) at varying temperatures (400 - 900 K) controlled by laser heating. At high temperature, we…