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Search Publications by: Yiming Qiu (Fed)

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Displaying 1 - 25 of 155

Time evolution of a pumped molecular magnet - a time resolved inelastic neutron scattering study

January 1, 2025
Author(s)
T. Reeder, Paraj Titum, J. Kindervater, Qiang Ye, Jose Rodriguez Rivera, Yiming Qiu, Nicholas C. Maliszewskyj, T. McQueen, Collin L. Broholm
ntroducing an experimental technique of time-resolved inelastic neutron scattering (TRINS), we explore the time-dependent effects of resonant pulsed microwaves on the molecular magnet Cr8F8Piv16. The octagonal rings of magnetic Cr3+ atoms with

Continuum of magnetic excitations in the Kitaev honeycomb iridate D3LiIr2O6

February 12, 2024
Author(s)
Thomas Halloran, Yishu Wang, Kemp Plumb, M. B. Stone, Barry Winn, M. K. Graves-Brook, Jose Rodriguez Rivera, Yiming Qiu, Prashant Chauhan, N. Armitage, Tomohiro Takayama, Hidenori Takagi, Collin L. Broholm
Inelastic neutron scattering (INS) measurements of powder D3(7Li)(193Ir)2O6 reveal low energy magnetic excitations with a scattering cross section that is featureless versus |Q| and consistent with a Kitaev spin-liquid (KSL) state. The magnetic nature of

Bootstrapped Dimensional Crossover of a Spin Density Wave

August 17, 2022
Author(s)
Anjana Samarakoon, J. Strempfer, Junjie Zhang, Feng Ye, Yiming Qiu, J.-W. Kim, H. Zheng, S. Rosenkranz, M. Norman, J. Mitchell, D. Phelan
Quantum materials display rich and myriad types of magnetic, electronic, and structural ordering, often with these ordering modes either competing with one another or 'intertwining,' that is, reinforcing one another. Low dimensional quantum materials

Disorder-Induced Excitation Continuum in a Spin-1/2 Cobaltate on a Triangular Lattice

July 31, 2023
Author(s)
Bin Gao, Tong Chen, Chien-Lung Huang, Yiming Qiu, Guangyong Xu, Jesse Liebman, Lebing Chen, Matthew B. Stone, Erxi Feng, Huibo Cao, Xiaoping Wang, Xianghan Xu, Sang-Wook Cheong, Stephen Winter, Pengcheng Dai
A spin-1/2 triangular-lattice antiferromagnet is a prototypical frustrated quantum magnet, which exhibits remarkable quantum many-body effects that arise from the synergy between geometric spin frustration and quantum fluctuations. It can host quantum

Magnetic Ground State of the Kitaev Na 2 Co 2 TeO 6 Spin Liquid Candidate

June 2, 2023
Author(s)
Weiliang Yao, Yang Zhao, Yiming Qiu, Christian Balz, Ross Stewart, Jeffrey Lynn, Yuan Li
As a candidate Kitaev material, Na 2Co 2TeO 6 exhibits intriguing magnetism on a honeycomb lattice that is believed to be C 3-symmetric. Here we report a neutron diffraction study of its high-quality single crystals under a-axis magnetic fields. While

Beyond Single Tetrahedron Physics of the Breathing Pyrochlore Compound Ba 3 Yb 2 Zn 5 O 11

April 20, 2023
Author(s)
Rabindranath Bag, Sachith Dissanayake, Han Yan, Zhenzhong Shi, David Graf, Eun S. Choi, Casey Marjerrison, Franz Lang, Tom Lancaster, Yiming Qiu, Wangchun Chen, Stephen J. Blundell, Andriy H. Nevidomskyy, Sara Haravifard
Recently a new class of quantum magnets, the so-called breathing pyrochlore systems, have attracted much attention due to their potential to host exotic emergent phenomena. Here, we present magnetometry, thermal, muon-spin relaxation, and polarized

Geometrical Frustration Versus Kitaev Interactions in BaCo 2 (AsO 4 ) 2

January 10, 2023
Author(s)
Thomas Halloran, Felix Desrochers, Emily Zhang, Tong Chen, Li E. Chern, Zhijun Xu, Barry Winn, Melissa Graves-Brook, M. B. Stone, Alexander I. Kolesnikov, Yiming Qiu, Ruidan Zhong, Robert Cava, Yong Kim, Collin L. Broholm
Recently, Co-based honeycomb magnets have been proposed as promising candidate materials to host the Kitaev spin liquid state. One of the front-runners is BaCo 2(AsO 4) 2 (BCAO), where it was suggested that the exchange processes between Co 2+ ions via the

Highly Tunable Magnetic Phases in Transition-Metal Dichalcogenide Fe 1/3+d NbS 2

April 5, 2022
Author(s)
Shan Wu, Zhijun Xu, Shannon Haley, Sophie Weber, Arani Acharya, Eran Maniv, Yiming Qiu, A. A. Aczel, Nicholas S. Settineri, Jeffrey Neaton, James Analytis, Robert Birgeneau
Layered transition metal dichalcogenides (TMDCs) host a plethora of interesting physical phenomena ranging from charge order to superconductivity. By introducing magnetic ions into 2H-NbS 2, the material forms a family of magnetic intercalated TMDCs T xNbS

Non-magnetic ion site disorder effects on the quantum magnetism of a spin-1/2 equilateral triangular lattice antiferromagnet

March 10, 2022
Author(s)
Qing Huang, R. Rawl, W. W. Xie, E. S. Chou, V. S. Zapf, X. X. Ding, C. Mauws, C. R. Wiebe, E. X. Feng, H. B. Cao, W. Tian, J. Ma, Yiming Qiu, Nicholas Butch, H. D. Zhou
With the motivation to study how non-magnetic ion site disorder affects the quantum magnetism of Ba3CoSb2O9, a spin-1/2 equilateral triangular lattice antiferromagnet, we performed DC and AC susceptibility, specific heat, elastic and inelastic neutron

Spin Dynamics in the Skyrmion-Host Lacunar Spinel GaV 4 S 8

December 20, 2021
Author(s)
G. Pokharel, H. Arachchige, S. Gao, S.-H. Do, R. Fishman, G. Ehlers, Yiming Qiu, Jose Rodriguez Rivera, M. B. Stone, H. Zhang, Stephen Wilson, D. Mandrus, A. Christianson
In the lacunar spinel GaV 4S 8, the interplay of spin, charge, and orbital degrees of freedom produces a rich phase diagram that includes an unusual Neel-type skyrmion phase composed of molecular spins. To provide ´ insight into the interactions underlying

Freezing of a Disorder Induced Spin Liquid with Strong Quantum Fluctuations

June 29, 2021
Author(s)
Xiao Hu, Daniel M. Pajerowski, Depei Zhang, Andrey Podlesnyak, Yiming Qiu, Qing Huang, Haidong Zhou, Israel Klich, Alexander I. Kolesnikov, M. B. Stone, Seung-Hun Lee
Sr 2CuTe 0.5W 0.5O 6 is a square-lattice magnet with super-exchange between S = 1/2 Cu 2+ spins mediated by randomly distributed Te and W ions. Here, using sub-K temperature and 20 µeV energy resolution neutron scattering experiments we show that this

High-Energy Magnetic Excitations from Heavy Quasiparticles in CeCu 2 Si 2

June 18, 2021
Author(s)
Yu Song, Weiyi Wang, Chongde Cao, Zahra Yamani, Yuanji Xu, Yutao Sheng, Wolfgang Loser, Yiming Qiu, Yi-Feng Yang, Robert J. Birgeneau, Pengcheng Dai
The heavy fermion superconductor CeCu 2Si 2 is located near an antiferromagnetic quantum critical point, indicating significant interplay between magnetism and superconductivity. Using inelastic neutron scattering, we show magnetic excitations in CeCu 2Si

Monopolar and dipolar relaxation in spin ice Ho2Ti2O7

June 16, 2021
Author(s)
Yishu Wang, T. Reeder, Y. Karaki, J. Kindervater, T. Halloran, Nicholas C. Maliszewskyj, Yiming Qiu, Jose Rodriguez Rivera, Sergiy Gladchenko, S. M. Koohpayeh, S. Nakatsuji, Collin L. Broholm
Ferromagnetically interacting Ising spins on the pyrochlore lattice of corner-sharing tetrahedra form a highly degenerate manifold of low-energy states. A spin flip relative to this "spin-ice" manifold can fractionalize into two oppositely charged magnetic

Pristine Quantum Criticality in a Kondo Semimetal

May 19, 2021
Author(s)
Wesley T. Fuhrman, Andrey Sidorenko, Jonathan Hanel, Hannes Winkler, Andrey Prokofiev, Jose Rodriguez Rivera, Yiming Qiu, Peter Blaha, Qimiao Si, Collin L. Broholm, Silke Paschen
The observation of quantum criticality in diverse classes of strongly correlated electron systems has been instrumental in establishing ordering principles, discovering new phases, and identifying the relevant degrees of freedom and interactions. At focus

Dynamical Ground State in the XY Pyrochlore Yb 2 GaSbO 7

May 5, 2021
Author(s)
P. M. Sarte, K. Cruz-Kan, B. R. Ortiz, K. H. Hong, M. M. Bordelon, D. Reig-i-Plessis, M. Lee, E. S. Choi, Matthew Stone, S. Calder, D. M. Pajerowski, L. Mangin-Thro, Yiming Qiu, J. P. Attfield, S. D. Wilson, C. Stock, H. D. Zhou, A. M. Hallas, J. A. Paddison, A. A. Aczel, C. R. Wiebe
The magnetic ground state of the pyrochlore Yb 2GaSbO 7 has remained an enigma for nearly a decade. The persistent spin fluctuations observed by muon spin relaxation measurements at low temperatures have not been adequately explained for this material

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