107 citations · 933 across the 41 of their papers we have counts for
21 papers · 1 filter
Double and Quadruple Flat Bands tuned by Alternative magnetic Fluxes in Twisted Bilayer Graphene
Congcong Le, Qiang Zhang, Cui Fan +2
Twisted bilayer graphene (TBG) can host the moiré energy flat bands with two-fold degeneracy serving as a fruitful playground for strong correlations and topological phases. Howeve…
Field-tunable toroidal moment in a chiral-lattice magnet
Lei Ding, Xianghan Xu, Harald O. Jeschke +13
A toroidal dipole moment appears independent of the electric and magnetic dipole moment in the multipole expansion of electrodynamics. It arises naturally from vortex-like arrangem…
A catastrophic charge density wave in BaFeAl
William R. Meier, Bryan C. Chakoumakos, Satoshi Okamoto +8
Charge density waves (CDW) are modulations of the electron density and the atomic lattice that develop in some crystalline materials at low temperature. We report an unusual exampl…
Unusual exchange couplings and intermediate temperature Weyl state in Co3Sn2S2
Qiang Zhang, Satoshi Okamoto, German D. Samolyuk +7
Understanding the magnetism and its possible correlations to the topological properties has emerged as a forefront and difficult topic in studying magnetic Weyl semimetals. Co$_{3}…
Hierarchical excitations from correlated spin tetrahedra on the breathing pyrochlore lattice
Shang Gao, Andrew F. May, Mao-Hua Du +10
The hierarchy of the coupling strengths in a physical system often engenders an effective model at low energies where the decoupled high-energy modes are integrated out. Here, usin…
Antiferromagnetism and crystalline-electric field excitations in tetragonal NaCeO2
Mitchell M. Bordelon, Joshua D. Bocarsly, Lorenzo Posthuma +3
We investigate the crystal structure, magnetic properties, and crystalline-electric field of tetragonal, , NaCeO. In this compound, Ce ions form a tetragonally…
Complex magnetic phases in polar tetragonal intermetallic NdCoGe
Binod K. Rai, Ganesh Pokharel, Hasitha Suriya Arachchige +8
Polar materials can host a variety of topologically significant magnetic phases, which often emerge from a modulated magnetic ground state. Relatively few noncentrosymmetric tetrag…
Tuning quantum transport by controlling spin reorientations in Dirac semimetal candidates EuSrMnSb
Qiang Zhang, Jinyu Liu, Huibo Cao +4
Magnetic topological semimetals have attracted intense attention recently since these materials carry a great promise for potential applications in novel spintronic devices. Here,…
Weakly coupled alternating chains in the distorted honeycomb lattice compound NaCuTeO
Shang Gao, Ling-Fang Lin, Andrew F. May +5
Spin-1/2 chains with alternating antiferromagnetic (AF) and ferromagnetic (FM) couplings exhibit quantum entanglement like the integer-spin Haldane chains and might be similarly ut…
Structure, Magnetism and First Principles Modeling of the Na0.5La0.5RuO3 Perovskite
Loi T. Nguyen, Matthieu Saubanère, Robert J. Cava
High purity polycrystalline Na0.5La0.5RuO3 was synthesized by a solid state method, and its properties were studied by magnetic susceptibility, heat capacity and resistivity measur…
Anomalous Magnetic Behavior in Ba2CoO4 with Isolated CoO4 Tetrahedra
Qiang Zhang, Guixin Cao, Feng Ye +9
The dimensionality of the electronic and magnetic structure of a given material is generally predetermined by its crystal structure. Here, using elastic and inelastic neutron scatt…
Quasi-2D magnetism and origin of the Dirac semimetallic behavior in nonstoichiometric SrMnSb (y, z~0.1)
Qiang Zhang, Satoshi Okamoto, Matthew B. Stone +5
Nonstoichiometric SrMnSb (y, z~0.1) is known to exhibit a coexistence of magnetic order and the nontrivial semimetallic behavior related to Dirac or Weyl f…
Ni-based transition-metal trichalcogenide monolayer: a strongly correlated quadruple-layer graphene
Yuhao Gu, Qiang Zhang, Congcong Le +3
We investigate the electronic physics of layered Ni-based trichalcogenide NiPX (X=S, Se), a member of transition-metal trichalcogenides (TMTs) with the chemical formula, ABX$_3…
Mn-induced magnetic symmetry breaking and its correlation with the metal-insulator transition in bilayered Sr3(Ru1-xMnx)2O7
Qiang Zhang, Feng Ye, Wei Tian +8
Bilayered Sr3Ru2O7 is an unusual metamagnetic metal with inherently antiferromagnetic (AFM) and ferromagnetic (FM) fluctuations. Partial substitution of Ru by Mn results in the est…
Structure and magnetic properties of {\it Ln}MnSbO ({\it Ln} = La and Ce) and CeMnAsO
Qiang Zhang, C. M. N. Kumar, Wei Tian +3
Neutron powder diffraction (NPD) study of \textit{Ln}MnSbO (\textit{Ln } La or Ce) reveals differences between the magnetic ground state of the two compounds due to the strong C…
Spin reorientation and Ce-Mn coupling in antiferromagnetic oxypnictide CeMnAsO
Qiang Zhang, Wei Tian, Spencer G. Peterson +2
Structure and magnetic properties of high-quality polycrystlline CeMnAsO, a parent compound of the "1111"-type oxypnictides, have been investigated using neutron powder diffraction…
Neutron-scattering measurements of the spin excitations in LaFeAsO and Ba(FeCo)As: Evidence for a sharp enhancement of spin fluctuations by nematic order
Qiang Zhang, Rafael M. Fernandes, Jagat Lamsal +11
Inelastic neutron scattering was employed to investigate the impact of electronic nematic order on the magnetic spectra of LaFeAsO and Ba(FeCo)As. T…
Magnetic excitations and anomalous spin wave broadening in multiferroic FeV2O4
Qiang Zhang, Mehmet Ramazanoglu, Songxue Chi +3
We report on the different roles of two orbital-active Fe at the A site and V at the B site in the magnetic excitations and on the anomalous spin wave broadening in F…
Magnetic structures and the Ce-Fe coupling induced Fe spin reorientation in CeFeAsO single crystal
Qiang Zhang, Wei Tian, Haifeng Li +8
Neutron and synchrotron resonant X-ray magnetic scattering (RXMS) complemented by heat capacity and resistivity measurements reveal the evolution of the magnetic structures of Fe a…
Experimental evidence of a collinear antiferromagnetic ordering in the frustrated CoAl2O4 spinel
B. Roy, Abhishek Pandey, Q. Zhang +4
Nuclear magnetic resonance (NMR), neutron diffaction (ND), x-ray diffraction, magnetic susceptibility and specific heat measurements on the frustrated A-site spinel CoAl2O4 compoun…
Magnetoelastic coupling and charge correlation lengths in a twin domain of Ba(FeCo)As (): A high-resolution X-ray diffraction study
Qiang Zhang, Wenjie Wang, Jong-Woo Kim +6
The interplay between structure, magnetism and superconductivity in single crystal Ba(FeCo)As (x=0.047) has been studied using high-resolution X-ray diffr…