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Search Publications by: Collin L. Broholm (Assoc)

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Displaying 1 - 25 of 29

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

Noncollinear Ferromagnetic Weyl Semimetal with Anisotropic Anomalous Hall Effect

March 24, 2021
Author(s)
Hung-Yu Yang, Bahadur Singh, Jonathan Gaudet, Baozhu Lu, Cheng-Yi Huang, Wei-Chi Chiu, Shin-Ming Huang, Baokai Wang, Faranak Bahrami, Bochao Xu, Jacob Franklin, Ilya Sochnikov, David Graf, Guangyong Xu, Yang Zhao, Christina Hoffman, Hsin Lin, Darius Torchinsky, Collin L. Broholm, Arun Bansil, Fazel Tafti

Multiphase Magnetism in Yb 2 Ti 2 O 7

November 3, 2020
Author(s)
Allen Scheie, Jonas Kindervater, Shu Zhang, Hitesh Changlani, G. Sala, Georg Ehlers, Andre Heinemann, Gregory Tucker, Seyed Koohpayeh, Collin L. Broholm

Antichiral Spin Order, its Soft Modes, and their Hybridization with Phonons in the Topological Semimetal Mn 3 Ge

August 3, 2020
Author(s)
Y. Chen, Jonathan Gaudet, S. Dasgupta, G. G. Marcus, J. Lin, T. Chen, T. Tomita, M. Ikhlas, Yang Zhao, Wangchun Chen, Matthew B. Stone, O. Tchernyshyov, S. Nakatsuji, Collin L. Broholm
Quantum materials with strong transport responses to disparate physical quantities are of great fundamental significance and may hold technological potentials. The interplay between interactions and topology drive such responses through the effects of

Orientation Dependence of the Magnetic Phase Diagram of Yb 2 Ti 2 O 7

May 21, 2020
Author(s)
S. Saubert, A. Scheie, C. Duvinage, J. Kindervater, S. Zhang, H. J. Changlani, Guangyong Xu, S. M. Koohpayeh, O. Tchernyshyov, Collin L. Broholm, C. Pfleiderer
In the quest to realize a quantum spin liquid (QSL), magnetic long-range order is hardly welcome. Yet it can offer deep insights into a complex world of strong correlations and fluctuations. Much hope was placed in the cubic pyrochlore Yb 2 Ti 2 O 7 as a

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 2 OSeO 3 . Fully documenting the four lowest energy magnetic modes that leave the ferrimagnetic configuration of the "strong

Homogeneous Reduced Moment in a Gapful Scalar Chiral Kagome Antiferromagnet

July 12, 2019
Author(s)
A. Scheie, S. Dasgupta, M. Sanders, A. Sakai, Y. Matsumoto, Timothy R Prisk, S. Nakatsuji, R. J. Cava, Collin L. Broholm
We present a quantitative experimental investigation of the scalar chiral magnetic order with in Nd 3 Sb 3 Mg 2 O 14 . Static magnetization reveals a net ferromagnetic ground state, and inelastic neutron scattering from the hyperfine coupled nuclear spin

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

Incommensurate Magnetism near Quantum Criticality in CeNiAsO

May 15, 2019
Author(s)
Shan Wu, W. A. Phelan, L. Liu, J. R. Morey, J. A. Tutmaher, J. C. Neuefeind, Ashfia Huq, Matthew B. Stone, M. Feygenson, David W. Tam, Benjamin A. Frandsen, Benjamin Trump, Cheng Wan, S. R. Dunsiger, Tyrel M. McQueen, Y. J. Uemura, Collin L. Broholm

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

Screened Moments and Extrinsic In-Gap States in Samarium Hexaboride

April 18, 2018
Author(s)
W. T. Fuhrman, J. R. Chamorro, P. A. Alekseev, J.-M. Mignot, T. Keller, Jose Rodriguez Rivera, Yiming Qiu, P. Nikolic, T. M. McQueen, Collin L. Broholm
The Kondo impurity effect in metals is the result of quantum-mechanical scattering of conduction electrons by magnetic impurities. 1 This process leads to exotic effects such as unconventional superconductivity and an effective electron mass enhanced by 2

Reentrant Phase Diagram of Yb 2 Ti 2 O 7 in a [111] Magnetic Field

September 22, 2017
Author(s)
A. Scheie, J. Kindervater, S. Saubert, C. Duvinage, C. Pfleiderer, H. J. Changlani, S. Zhang, Leland Harriger, K. Arpino, S. M. Koohpayeh, Collin L. Broholm
We present a phase diagram of rare-earth pyrochlore Yb 2 Ti 2 O 7 in a (111) magnetic field. Using heat capacity, magnetization, and neutron scattering data, we show an unusual field-dependence of a first-order phase boundary, wherein a small applied field

Gapped Excitations in the High-Pressure Antiferromagnetic Phase of URu 2 Si 2

May 31, 2017
Author(s)
T. J. Williams, H. Barath, Z. Yamani, Jose Rodriguez Rivera, Juscelino Leao, J. D. Garrett, G. M. Luke, W.J. L. Buyers, Collin L. Broholm
We report a neutron scattering study of the magnetic excitation spectrum in each of the three temperature and pressure phases of URu 2 Si 2 . We find qualitatively similar excitations throughout the (H0L)scattering plane in the hidden order and large

Spin Excitations and the Fermi Surface of Superconducting FeS

March 10, 2017
Author(s)
Haoran Man, Jiangang Guo, Rui Zhang, Rico U. Schonemann, Zhiping Yin, Mingxuan Fu, Matthew B. Stone, Qingzhen Huang, Yu Song, Weiyi Wang, David J. Singh, Felix Lochner, Tillman Hickel, Ilya Eremin, Leland Harriger, Jeffrey W. Lynn, Collin L. Broholm, Luis Balicas, Qimiao Si, Pengcheng Dai

Disordered Route to the Coulomb Quantum Spin Liquid: Random Transverse Fields on Spin Ice in Pr 2 Zr 2 O 7

March 8, 2017
Author(s)
J.-J. Wen, S.M. Koohpayeh, K. A. Ross, B. A. Trump, T. M. McQueen, K. Kimura, S. Nakatsuji, Yiming Qiu, D. M. Pajerowski, John R. Copley, Collin L. Broholm
Inelastic neutron scattering reveals a broad continuum of excitations in Pr 2 Zr 2 O 7 , the temperature and magnetic field dependence of which indicate a continuous distribution of quenched transverse fields (Δ}) acting on the non-Kramers Pr 3+ crystal

Modulated Magnetism and Anomalous Electronic Transport in Ce 3 Cu 4 As 4 O 2

August 29, 2016
Author(s)
Jiakui K. Wang, Shan Wu, Yiming Qiu, Jose Rodriguez Rivera, Qingzhen Huang, Collin L. Broholm, E. Morosan
The complex magnetism and transport properties of tetragonal Ce 3 Cu 4 As 4 O 2 were examined through neutron scattering and physical properties measurements on polycrystalline samples. The lamellar structure consists of alternating layers of CeCu 4 As 4

Modulated Magnetism and Anomalous Electronic Transport in Ce 3 Cu 4 As 4 O 2

August 29, 2016
Author(s)
Jiakui K. Wang, Shan Wu, Yiming Qiu, Jose Rodriguez Rivera, Qingzhen Huang, Collin L. Broholm, E. Morosan
The complex magnetism and transport properties of tetragonal Ce 3 Cu 4 As 4 O 2 were examined through neutron scattering and physical properties measurements on polycrystalline samples. We find a lamellar structure consisting of alternating layers of CeCu

Effective Spin-1/2 Scalar Chiral Order on Kagome Lattices in Nd 3 Sb 3 Mg 2 O 14

May 20, 2016
Author(s)
A. Scheie, M. Sanders, J. Krizan, Yiming Qiu, R. J. Cava, Collin L. Broholm
We introduce Nd 3 Sb 3 Mg 2 O 14 with ideal kagome lattices of neodymium ions in ABC stacking. Thermodynamic measurements show a Curie-Weiss temperature of θ cw = -0.12 Jm a Bd 3+ spin 1/2 Kramers doublet ground state, and as second order phase transition

Static and Dynamic XY-Like Short-Range Order in a Frustrated Magnet with Exchange Disorder

January 22, 2016
Author(s)
K. A. Ross, J. W. Krizan, Jose Rodriguez Rivera, R. J. Cava, Collin L. Broholm
A single crystal of NaCaCo 2F d7^ was studied using elastic and inelastic neutron scattering. NaCaCo 2 F 7 is a newly synthesized A 2 B 2 X 7 type pyrochlore, hosting magnetic Co 2+ ions on the Bsite and mixed non-magnetic Na + /Ca 2+ ions on the a A-site

Disorder from Order Among Anisotropic Next-Nearest-Neighbor Ising Spin Chains in SrHo 2 O 4

February 26, 2015
Author(s)
J.-J. Wen, W. Tian, V. O. Garlea, S. M. Koohpayeh, T. M. McQueen, H.-F. Li, J.-Q. Yan, Jose Rodriguez Rivera, D. Vaknin, Collin L. Broholm
We describe why Ising spin chains with competing interactions in SrHo 2 O 4 segregate into ordered and disordered ensembles at low temperatures (T). Using elastic neutron scattering, magnetization, and specific heat measurements, the two distinct spin

Ghost Modes and Continuum Scattering in the Dimerized Distorted Kagome Lattice Antiferromagnet Rb 2 Cu 3 SnF 12

January 21, 2014
Author(s)
K. Matan, Y. Nambu, Yang Zhao, T.J. Sato, Y. Fukumoto, T. Ono, H. Tanaka, Collin L. Broholm, A. Podlesnyak, G. Ehlers
Magnetic excitations of the pinwheel valence bond solid state in the distorted kagome lattice antiferromagnet Rb 2 Cu 3 SnF 12 were studied using high-resolution inelastic neutron scattering. A weakly dispersive mode around 5 meV and duplicate triplet

Molecular Quantum Magnetism in LiZn 2 Mo 3 O 8

January 15, 2014
Author(s)
M. Mourigal, W. T. Fuhrman, J. P. Sheckelton, A. Wartelle, Jose Rodriguez Rivera, D. L. Abernathy, T. M. McQueen, Collin L. Broholm
Inelastic neutron scattering at temperatures below 30 K from a powder of LiZn 2 Mo 3 O 8 demonstrates this triangular-lattice antiferromagnet hosts collective magnetic excitations from spin 1⁄2 Mo 3 O 13 molecules. The excitation spectrum, that appears