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Search Publications by: Yiming Qiu (Fed)

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Displaying 26 - 50 of 155

A Spin Hamiltonian for BaCdVO(PO 4 ) 2

April 1, 2021
Author(s)
V. K. Bhartiya, S. Hayashida, K. Yu. Povarov, Z. Yan, Yiming Qiu, S. Raymond, A. Zheludev
Single crystal inelastic neutron scattering is used to study spin wave excitations in the fully polarized state of the frustrated quantum ferro-antiferromagnet BaCdVO(PO 4) 2. The data analysis is based on a Heisenberg spin Hamiltonian that includes as

Intertwined Density Waves in a Metallic Nickelate

November 26, 2020
Author(s)
Junjie Zhang, D. Phelan, A. S. Botana, Yu-Sheng Chen, Hong Zheng, M. Krogstad, Suyin G. Wang, Yiming Qiu, Jose Rodriguez Rivera, R. Osborn, S. Rosenkranz, M. R. Norman, J. F. Mitchell
Nickelates are a rich class of materials, ranging from insulating magnets to superconductors. But for stoichiometric materials, insulating behavior is the norm, as for most late transition metal oxides. Notable exceptions are the 3D perovskite LaNiO 3, an

Nature of the Spin Resonance Mode in CeCoIn 5

May 29, 2020
Author(s)
Yu Song, Weiyi Wang, John S. Van Dyke, Naveen Pouse, Sheng Ran, Duygu Yazici, Astrid Schneidewind, Petr Cermak, Yiming Qiu, M. B. Maple, Dirk K. Morr, Pengcheng Dai
Complex intertwined orders often emerge in strongly correlated electron materials in the vicinity of unconventional superconductivity. Superconductivity is typically optimized when such orders are suppressed, although associated fluctuations remain intense

Anisotropic Effect of a Magnetic Field on the Neutron Spin Resonance in FeSe

April 16, 2020
Author(s)
Tong Chen, Youzhe Chen, David W. Tam, Bin Gao, Yiming Qiu, Astrid Schneidewind, Igor Radelytskyi, Karel Prokes, Songxue Chi, Masaaki Matsuda, Collin L. Broholm, Pengcheng Dai
We use inelastic neutron scattering to study the effect of a magnetic field on the neutron spin resonance (Er = 3.6 meV) of superconducting FeSe (Tc = 9 K). While a field aligned along the in-plane direction broadens and suppresses the resonance, a c-axis

Low-Energy Magnons in the Chiral Ferrimagnet Cu 2 OSeO 3 : A Coarse-Grained Approach

April 8, 2020
Author(s)
Yi Luo, G. G. Marcus, Benjamin Trump, J. Kindervater, M. B. Stone, Jose Rodriguez Rivera, Yiming Qiu, T. M. McQueen, O. Tchernyshyov, Collin L. Broholm
We report a comprehensive neutron scattering study of low energy magnetic excitations in the breathing pyrochlore helimagnetic Cu 2OSeO 3. Fully documenting the four lowest energy magnetic modes that leave the ferrimagnetic configuration of the "strong

Modification of Spin-Ice Physics in Ho 2 Ti 2 O 7 Thin Films

August 16, 2019
Author(s)
Kevin Barry, Biwen Zhang, Naween Anand, Yan Xin, Arturas Vailionis, Jennifer Neu, Colin A. Heikes, Charis Cochran, Haidong Zhou, Yiming Qiu, William D. Ratcliff, Theo Siegrist, Christianne Beekman
We report on a study of the structural and magnetic properties of strained Ho 2Ti 2O 7 thin films. Structural characterization via synchrotron x-ray diffraction confirms good crystallinity of our films and shows a critical thickness slightly below 50 nm

Anisotropic Spin Fluctuations in Detwinned FeSe

July 1, 2019
Author(s)
Tong Chen, Youzhe Chen, Andreas Kreisel, Xingye Lu, Astrid Schneidewind, Yiming Qiu, J. T. Park, Toby G. Perring, J. Ross Stewart, Huibo Cao, Rui Zhang, Yu Li, Yan Rong, Yuan Wei, Brian M. Andersen, P. J. Hirschfeld, Collin L. Broholm, Pengcheng Dai
Superconductivity in iron selenide (FeSe) emerges from a nematic phase that breaks four-fold rotational symmetry in the iron plane [Fig. 1(a)] [1-4]. Although this phase in FeSe is established below a tetragonal-to-orthorhombic transition temperature Τ s

Wide-Angle Polarization Analysis on the Multi-Axis Crystal Spectrometer for the Study of Collective and Single Particle Dynamics of Methanol at its Prepeak

July 1, 2019
Author(s)
Wangchun Chen, Shannon M. Watson, Yiming Qiu, Jose Rodriguez Rivera, Antonio Faraone
Neutron polarization analysis capability with a large scattering angle and momentum transfer coverage has not been widely implemented for the separation of coherent and incoherent quasi-elastic neutron scattering (QENS) spectra. A feasibility test for soft

Magnetic Structure and Spin Waves in the Frustrated Ferro-Antiferro Magnet Pb 2 VO(PO 4 ) 2

May 28, 2019
Author(s)
S. Bettler, F. Landolt, O. M. Aksoy, Z. Yan, S. Gvasaliya, Yiming Qiu, E. Ressouche, K. Beauvois, S. Raymond, A. N. Ponomaryov, S. A. Zvyagin, A. Zheludev
Single crystal neutron diffraction, inelastic neutron scattering and electron spin resonance experiments are used to study the magnetic structure and spin waves in Pb 2VO(PO 4) 2, a prototypical layered S =1/2 ferromagnet with frustrating next nearest

Quantum Critical Behavior in Ce(Fe 0.76 Ru 0.24 ) 2 Ge 2

May 7, 2019
Author(s)
Wouter Montfrooij, Tom Heitmann, Yiming Qiu, Shannon M. Watson, Ross Erwin, Wangchun Chen, Yang Zhao, Meigan Aronson, Yingkai Huang, Anne de Visser
Systems with embedded magnetic ions that exhibit a competition between magnetic order and disorder down to absolute zero can display unusual low temperature behaviors of the resistivity, hyperscaling behavior in which the relaxation back to equilibrium

Spinon Confinement and a Sharp Longitudinal Mode in Yb 2 Pt 2 Pb in Magnetic Fields

March 8, 2019
Author(s)
W. J. Gannon, I. A. Zaliznyak, L. S. Wu, A. E. Feiguin, A. M. Tsvelik, F. Demmel, Yiming Qiu, John R. Copley, M. S. Kim, M. C. Aronson
The fundamental excitation of spin chain systems is the spinon, which is a deconfined quasiparticle with fractionalized spin. Coupling spin chains leads to the confinement of these spinons, a condensed matter analog of quark confinement in quantum

Continuum of Quantum Fluctuations in a Three-Dimensional S = 1 Heisenberg Magnet

January 1, 2019
Author(s)
K. W. Plumb, Hitesh J. Changlani, A. Scheie, Shu Zhang, J. W. Krizan, Jose Rodriguez Rivera, Yiming Qiu, B. Winn, R. J. Cava, Collin L. Broholm
Spin liquids are a fundamentally new phase of matter that cannot be described by a broken symmetry and have no order parameter. While the quantum entanglement that characterizes a quantum spin liquid is not directly accessible to any current measurement