594 citations · 4.9k across the 97 of their papers we have counts for
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Stripe Helical Magnetism and Two Regimes of Anomalous Hall Effect in NdAlGe
Hung-Yu Yang, Jonathan Gaudet, Rahul Verma +11
We report the magnetic and electronic transport properties of the inversion and time-reversal symmetry breaking Weyl semimetal NdAlGe. This material is analogous to NdAlSi, whose h…
Large change of interlayer vibrational coupling with stacking in MoWTe
John A. Schneeloch, Yu Tao, Jaime A. Fernandez-Baca +2
Stacking variations in quasi-2D materials can have an important influence on material properties, such as changing the topology of the band structure. Unfortunately, the weakness o…
Gapless Dirac magnons in CrCl
John A. Schneeloch, Yu Tao, Yongqiang Cheng +4
Bosonic Dirac materials are testbeds for dissipationless spin-based electronics. In the quasi two-dimensional honeycomb lattice of CrX (X=Cl, Br, I), Dirac magnons have been…
A new noncollinear ferromagnetic Weyl semimetal with anisotropic anomalous Hall effect
Hung-Yu Yang, Bahadur Singh, Jonathan Gaudet +18
A developing frontier in condensed matter physics is the emergence of novel electromagnetic responses, such as topological and anomalous Hall effect (AHE), in ferromagnetic Weyl se…
Evolution of the structural transition in MoWTe
John A. Schneeloch, Yu Tao, Chunruo Duan +7
The composition dependence of the structural transition between the monoclinic 1T and orthorhombic T phases in the MoWTe Weyl semimetal was inv…
Broadband critical dynamics in disordered lead-based perovskites
C. Stock, M. Songvilay, P. M. Gehring +2
Materials based on the cubic perovskite unit cell continue to provide the basis for technologically important materials with two notable recent examples being lead-based relaxor pi…
Decoupled molecular and inorganic framework dynamics in CHNHPbCl
M. Songvilay, Zitian Wang, V. Garcia Sakai +7
The organic-inorganic lead halide perovskites are composed of organic molecules imbedded in an inorganic framework. The compounds with general formula CHNHPbX (MA…
Common acoustic phonon lifetimes in inorganic and hybrid lead halide perovskites
M. Songvilay, N. Giles-Donovan, M. Bari +12
The acoustic phonons in the organic-inorganic lead halide perovskites have been reported to have anomalously short lifetimes over a large part of the Brillouin zone. The resulting…
Electric field effect on short-range polar orders in a relaxor ferroelectric system
Zhijun Xu, Fei Li, Shujun Zhang +4
Short-range polar orders in the relaxor ferroelectric material PbMgNbO-PbTiO (PMN-28PT) have been studied using neutron diffuse scattering. An externa…
Lifetime-shortened acoustic phonons and static order at the Brillouin zone boundary in the organic-inorganic perovskite CHNHPbCl
M. Songvilay, M. Bari, Z. -G. Ye +7
Lead halide hybrid perovskites consist of an inorganic framework hosting a molecular cation located in the interstitial space. These compounds have been extensively studied as they…
Spin-wave induced phonon resonance in multiferroic BiFeO
Zhijun Xu, J. A. Schneeloch, Jinsheng Wen +13
We report the direct observation of a "resonance" mode in the lowest-energy optic phonon very near the zone center around (111) in the multiferroic BiFeO using neutron scatteri…
Spontaneous decay of a soft optical phonon in the relaxor ferroelectric PbMgNbO
C. Stock, P. M. Gehring, R. A. Ewings +4
We report the spontaneous decay of a soft, optical phonon in a solid. Using neutron spectroscopy, we find that specific phonon lifetimes in the relaxor PbMgNbO$_{3}…
Phonon coupling to dynamic short-range polar order in a relaxor ferroelectric near the morphotropic phase boundary
John A. Schneeloch, Zhijun Xu, B. Winn +4
We report neutron inelastic scattering experiments on single crystal PbMgNbO doped with 32\% PbTiO, a relaxor ferroelectric that lies close to the morph…
Neutron inelastic scattering measurements of low energy phonons in the multiferroic BiFeO3
John A. Schneeloch, Zhijun Xu Jinsheng Wen, P. M. Gehring +11
We present neutron inelastic scattering measurements of the low-energy phonons in single crystal BiFeO3. The dispersions of the three acoustic phonon modes (LA along [100], TA1 alo…
Thermal evolution of the full three-dimensional magnetic excitations in the multiferroic BiFeO3
Zhijun Xu, Jinsheng Wen, Tom Berlijn +8
The idea of embedding and transmitting information within the fluctuations of the magnetic moments of spins (spin waves) has been recently proposed and experimentally tested. The c…
Freezing of the local dynamics in the relaxor ferroelectric PZN-4.5PT
Zhijun Xu, Jinsheng Wen, E. Mamontov +3
We report measurements of the neutron diffuse scattering in a single crystal of the relaxor ferroelectric material 95.5%Pb(Zn1/3Nb2/3)O3-4.5%PbTiO3 (PZN-4.5%PT). We show that the d…
A two-component model of the neutron diffuse scattering in the relaxor ferroelectric PZN-4.5%PT
Zhijun Xu, Jinsheng Wen, Guangyong Xu +3
We report measurements of the neutron diffuse scattering in a single crystal of the relaxor ferroelectric material 95.5%Pb(ZnNb)O-4.5%PbTiO (PZN-4.5%PT). Ou…
Interplay between static and dynamic polar correlations in relaxor Pb(Mg_{1/3}Nb_{2/3})O_{3}
C. Stock, L. Van Eijck, P. Fouquet +7
We have characterized the dynamics of the polar nanoregions in Pb(MgNb)O (PMN) through high-resolution neutron backscattering and spin-echo measurements of th…
Robust charge and magnetic order under electric field and current in the multiferroic LuFe(2)O(4)
Jinsheng Wen, Guangyong Xu, Genda Gu +1
We performed elastic neutron scattering measurements on the charge- and magnetically-ordered multiferroic material LuFe(2)O(4). An external electric field along the [001] direction…
Competing orders in PZN-xPT and PMN-xPT relaxor ferroelectrics
Guangyong Xu
Neutron and x-ray scattering studies on relaxor ferroelectric systems Pb(ZnNb)O (PZN), Pb(MgNb)O (PMN), and their solid solutions with PbTiO…
Soft phonon columns on the edge of the Brillouin zone in the relaxor PbMg1/3Nb2/3O3
I. P. Swainson, C. Stock, P. M. Gehring +7
We report lattice dynamical measurements, made using neutron inelastic scattering methods, of the relaxor perovskite PbMg1/3Nb2/3O3 (PMN) at momentum transfers near the edge of the…
Dynamic origin of the morphotropic phase boundary - Soft modes and phase instability in 0.68Pb(Mg1/3Nb2/3O3)-0.32PbTiO3
Hu Cao, Chris Stock, Guangyong Xu +3
We report neutron inelastic scattering on single crystal 0.68Pb(Mg1/3Nb2/3O3)-0.32PbTiO3 (PMN-0.32PT), a relaxor ferroelectric material that lies within the compositional range of…
The effect of local dipole moments on the structure and lattice dynamics of K0.98Li0.02TaO3
Jinsheng Wen, Guangyong Xu, C. Stock +5
We present high energy x-ray (67 keV) and neutron scattering measurements on a single crystal of KLiTaO for which the Li content () is less than $x_c = 0.02…
Response of polar nanoregions in 68%Pb(Mg1/3Nb2/3)O3-32%PbTiO3 to a [001] electric field
Jinsheng Wen, Guangyong Xu, C. Stock +1
We report neutron diffuse scattering measurements on a single crystal of 68%Pb(Mg1/3Nb2/3)O3-32%PbTiO3. Strong diffuse scattering is observed at low temperatures. An external field…