Weiyi Wang

activity

20162026

most citedCoexistence of ferromagnetic and stripe antiferromagnetic spin fluctuations in SrCo

_{2}

_{2}

33 citations · 266 across the 21 of their papers we have counts for

collaborators

21 papers

cond-mat.str-el2026

Quasi-one-dimensional spin excitations in the iron pnictide NaFe $_{0.53}$ Cu $_{0.47}$ As

Yifan Wang, David W. Tam, Weiyi Wang +8

Spectroscopic measurements in model one-dimensional (1D) correlated systems offer insights for understanding their two-dimensional counterparts, which include the cuprate and iron…

cond-mat.str-el2021★ 11 cited

High-energy magnetic excitations from heavy quasiparticles in CeCu $_{2}$ Si $_{2}$

Yu Song, Weiyi Wang, Chongde Cao +8

Magnetic fluctuations is the leading candidate for pairing in cuprate, iron-based and heavy fermion superconductors. This view is challenged by the recent discovery of nodeless sup…

cond-mat.str-el2021★ 4 cited

Spin dynamics in NaFeAs and NaFe $_{0.53}$ Cu $_{0.47}$ As probed by resonant inelastic X-ray scattering

Yu Song, Weiyi Wang, Eugenio Paris +11

The parent compounds of iron-based superconductors are magnetically-ordered bad metals, with superconductivity appearing near a putative magnetic quantum critical point. The presen…

cond-mat.str-el2020★ 2 cited

Magnetic order and fluctuations in quasi-two-dimensional planar magnet Sr(Co $_{1 - x}$ Ni $_{x}$ ) $_{2}$ As $_{2}$

Yaofeng Xie, Yu Li, Zhiping Yin +9

We use neutron scattering to investigate spin excitations in Sr(Co $_{1 - x}$ Ni $_{x})_{2}$ As $_{2}$ , which has a $c$ -axis incommensurate helical structure of the two-dimensional (2D) in-pl…

cond-mat.supr-con2020★ 17 cited

Orbital-selective spin waves in detwinned NaFeAs

David W. Tam, Zhiping Yin, Yaofeng Xie +6

The existence of orbital-dependent electronic correlations has been recognized as an essential ingredient to describe the physics of iron-based superconductors. NaFeAs, a parent co…

cond-mat.supr-con2020★ 21 cited

Nature of the spin resonance mode in CeCoIn $_{5}$

Yu Song, Weiyi Wang, John S. Van Dyke +9

Spin-fluctuation-mediated unconventional superconductivity can emerge at the border of magnetism, featuring a superconducting order parameter that changes sign in momentum space. D…

cond-mat.str-el2019★ 19 cited

Flat band magnetism and helical magnetic order in Ni-doped SrCo $_{2}$ As $_{2}$

Yu Li, Zhonghao Liu, Zhuang Xu +15

A series of Sr(Co $_{1 - x}$ Ni $_{x}$ ) $_{2}$ As $_{2}$ single crystals was synthesized allowing a comprehensive phase diagram with respect to field, temperature, and chemical substitution to b…

cond-mat.supr-con2019★ 7 cited

Impact of the first order antiferromagnetic phase transition on the paramagnetic spin excitations and nematic phase of SrFe $_{2}$ As $_{2}$

David W. Tam, Weiyi Wang, Li Zhang +7

Understanding the nature of the electronic nematic phase in iron pnictide superconductors is important for elucidating its impact on high-temperature superconductivity. Here we use…

cond-mat.str-el2019★ 33 cited

Coexistence of ferromagnetic and stripe antiferromagnetic spin fluctuations in SrCo $_{2}$ As $_{2}$

Yu Li, Zhiping Yin, Zhonghao Liu +16

We use inelastic neutron scattering to study energy and wave vector dependence of spin fluctuations in SrCo $_{2}$ As $_{2}$ , derived from SrFe $_{2 - x}$ Co $_{x}$ As $_{2}$ iron pnictide supercond…

cond-mat.supr-con2018★ 14 cited

Neutron spin resonance as a probe of Fermi surface nesting and superconducting gap symmetry in Ba $_{0.67}$ K $_{0.33}$ (Fe $_{1 - x}$ Co $_{x}$ ) $_{2}$ As $_{2}$

Rui Zhang, Weiyi Wang, Thomas Maier +5

We use inelastic neutron scattering to study energy and wave vector dependence of the superconductivity-induced resonance in hole-doped Ba $_{0.67}$ K $_{0.33}$ (Fe $_{1 - x}$ Co $_{x}$ )$_{…

cond-mat.supr-con2018★ 4 cited

c-axis pressure induced antiferromagnetic order in optimally P-doped BaFe2(As0.70P0.30)2 superconductor

Ding Hu, Weiyi Wang, Wenliang Zhang +14

Superconductivity in BaFe2(As1-xPx)2 iron pnictides emerges when its in-plane two-dimensional (2D) orthorhombic lattice distortion associated with nematic phase at Ts and three-dim…

cond-mat.supr-con2018★ 30 cited

Local orthorhombic lattice distortions in the paramagnetic tetragonal phase of superconducting NaFe $_{1 - x}$ Ni $_{x}$ As

Weiyi Wang, Yu Song, Chongde Cao +9

Understanding the interplay between nematicity, magnetism and superconductivity is pivotal for elucidating the physics of iron-based superconductors. Here we use neutron scattering…

cond-mat.str-el2018★ 14 cited

Dynamic spin-lattice coupling and nematic fluctuations in NaFeAs

Yu Li, 1 Zahra Yamani, 2 Yu Song +14

We use inelastic neutron scattering to study acoustic phonons and spin excitations in single crystals of NaFeAs, a parent compound of iron pnictide superconductors. NaFeAs exhibits…

cond-mat.supr-con2018★ 13 cited

Disentangling superconducting and magnetic orders in NaFe_1-xNi_xAs using muon spin rotation

Sky C. Cheung, Zurab Guguchia, Benjamin A. Frandsen +24

Muon spin rotation and relaxation studies have been performed on a "111" family of iron-based superconductors NaFe_1-xNi_xAs. Static magnetic order was characterized by obtaining t…

cond-mat.supr-con2017★ 6 cited

Temperature and polarization dependence of low-energy magnetic fluctuations in nearly-optimal-doped NaFe $_{0.9785}$ Co $_{0.0215}$ As

Yu Song, Weiyi Wang, Chenglin Zhang +8

We use unpolarized and polarized neutron scattering to study the temperature and polarization dependence of low-energy magnetic fluctuations in nearly-optimal-doped NaFe $_{0.9785}$ …

cond-mat.supr-con2017★ 10 cited

Local breaking of four-fold rotational symmetry by short-range magnetic order in heavily overdoped Ba(Fe $_{1 - x}$ Cu $_{x}$ ) $_{2}$ As $_{2}$

Weiyi Wang, Yu Song, Ding Hu +6

We investigate Cu-doped Ba(Fe $_{1 - x}$ Cu $_{x}$ ) $_{2}$ As $_{2}$ with transport, magnetic susceptibility, and elastic neutron scattering measurements. In the heavily Cu-doped regime where lo…

cond-mat.supr-con2017★ 10 cited

Spin excitation anisotropy in the paramagnetic tetragonal phase of BaFe2 As2

Yu Li, Weiyi Wang, Yu Song +4

We use neutron polarization analysis to study temperature dependence of the spin excitation anisotropy in BaFe $_{2}$ As $_{2}$ , which has a tetragonal-to-orthorhombic structural distorti…

cond-mat.supr-con2017★ 9 cited

Orbital selective neutron spin resonance in underdoped superconducting NaFe $_{0.985}$ Co $_{0.015}$ As

Weiyi Wang, J. T. Park, Rong Yu +6

We use neutron scattering to study the electron-doped superconducting NaFe $_{0.985}$ Co $_{0.015}$ As ( $T_{c} = 14$ K), which has co-existing static antiferromagnetic (AF) order ( $T_{N} = 31$ …

cond-mat.supr-con2017★ 25 cited

Uniaxial pressure effect on the magnetic ordered moment and transition temperatures in BaFe $_{2 - x} T_{x}$ As $_{2}$ ( $T =$ Co, Ni)

David W. Tam, Yu Song, Haoran Man +22

We use neutron diffraction and muon spin relaxation to study the effect of in-plane uniaxial pressure on the antiferromagnetic (AF) orthorhombic phase in BaFe $_{2}$ As $_{2}$ and its Co-…

cond-mat.supr-con2017★ 17 cited

Spin excitations and the Fermi surface of superconducting FeS

Haoran Man, Jiangang Guo, Rui Zhang +17

High-temperature superconductivity occurs near antiferromagnetic instabilities and nematic state. Debate remains on the origin of nematic order in FeSe and its relation with superc…

cond-mat.supr-con2016

Absence of long wavelength nematic fluctuations in LiFeAs

Adrian Merritt, Jose Rodriguez-Rivera, Yu Li +4

We investigated long-wavelength nematic fluctuations in an Fe-based superconductor LiFeAs near q=(0.05,0,0) by measuring temperature-dependent renormalization of acoustic phonons t…

Quasi-one-dimensional spin excitations in the iron pnictide NaFe0.53​Cu0.47​As

High-energy magnetic excitations from heavy quasiparticles in CeCu2​Si2​

Spin dynamics in NaFeAs and NaFe0.53​Cu0.47​As probed by resonant inelastic X-ray scattering

Magnetic order and fluctuations in quasi-two-dimensional planar magnet Sr(Co1−x​Nix​)2​As2​

Orbital-selective spin waves in detwinned NaFeAs

Nature of the spin resonance mode in CeCoIn5​

Flat band magnetism and helical magnetic order in Ni-doped SrCo2​As2​

Impact of the first order antiferromagnetic phase transition on the paramagnetic spin excitations and nematic phase of SrFe2​As2​

Coexistence of ferromagnetic and stripe antiferromagnetic spin fluctuations in SrCo2​As2​

Neutron spin resonance as a probe of Fermi surface nesting and superconducting gap symmetry in Ba0.67​K0.33​(Fe1−x​Cox​)2​As2​