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Search Publications by: Nicholas Butch (Fed)

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Displaying 51 - 75 of 96

Quantum Versus Classical Spin Fragmentation in Dipolar Kagome Ice Ho 3 Mg 2 Sb 3 O 14

September 29, 2020
Author(s)
Zhiling Dun, Xiaojian Bai, Jospeh A. Paddison, Emily Hollingworth, Nicholas Butch, Clarina D. Cruz, Matthew Stone, Tao Hong, Franz Demmel, Martin Mourigal, Haidong Zhou
A promising route to realize entangled magnetic states combines geometrical frustration with quantum-tunneling effects. Spin-ice materials are canonical examples of frustration, and Ising spins in a transverse magnetic field are the simplest many-body

Enhancement and Reentrance of Spin Triplet Superconductivity in UTe 2 under Pressure

April 14, 2020
Author(s)
Sheng NMN Ran, Hyunsoo Kim, I-Lin Liu, Shanta Ranjan Saha, Ian Hayes, Tristin Metz, Yun Suk Eo, Johnpierre N. Paglione, Nicholas Butch
In a Kondo lattice system, suppression of effective Kondo coupling leads to the breakdown of the heavy-electron metal and a change in the electronic structure^1-4^. Spin triplet superconductivity in the Kondo lattice UTe 2 5 appears to be associated with

Quasi-two-dimensional magnon identification in antiferromagnetic FePS3 via magneto-Raman spectroscopy

February 18, 2020
Author(s)
Amber D. McCreary, Jeffrey R. Simpson, Thuc T. Mai, Robert D. McMichael, Jason E. Douglas, Nicholas P. Butch, Cindi L. Dennis, Rolando Valdes Aguilar, Angela R. Hight Walker
Recently it was discovered that van der Waals-bonded magnets retain long range magnetic ordering even down to a monolayer thickness, opening many avenues in fundamental physics and potential applications of these fascinating materials. One example is FePS3

Valence Instability Across the Magnetostructural Transition in USb 2

February 14, 2020
Author(s)
Z. E. Brubaker, Y. Xiao, P. Chow, C. Kenney-Benson, J. S. Smith, H. Cynn, C. Reynolds, Nicholas Butch, R. J. Zieve, J. R. Jeffries
We have performed pressure dependent X-ray diffraction and resonant X-ray emission spectroscopy experiments on USb 2 to further characterize the AFM-FM transition occuring near 8 GPa. We have found the magnetic transition coincides with a tetragonal to

Ungapped Magnetic Excitations Beyond Hidden Order in URu 2-x Re x Si 2

February 12, 2020
Author(s)
Nicholas P. Butch, Jose A. Rodriguez, M. Brian Maple
We use inelastic neutron scattering measurements to show that the energy gap in the magnetic excitations of URu 2Si 2, induced by the Hidden Order transition, is closed by Re substitution. The magnetic excitations remain ungapped in compositions where the

Point-Node Gap Structure of Spin-Triplet Superconductor UTe 2

December 19, 2019
Author(s)
Tristin Metz, Seokjin Bae, Sheng NMN Ran, I-Lin Liu, Yun Suk Eo, Wesley T. Fuhrman, Daniel F. Agterberg, Steven M. Anlage, Nicholas Butch, Johnpierre Paglione
Low-temperature electrical and thermal transport, heat capacity and magnetic penetration depth measurements were performed on single crystals of the actinide superconductor UTe 2 to determine the structure of the superconducting energy gap. Millikelvin

Extreme Magnetic Field-Boosted Superconductivity

December 1, 2019
Author(s)
Sheng NMN Ran, I Lin NMN Liu, Yun Suk Eo, Daniel J. Campbell, Paul M. Neves, Wesley T. Fuhrman, Shanta Ranjan Saha, Christoper Eckberg, Hyunsoo Kim, David Graf, Fedor Balakirev, John Singleton, Johnpierre N. Paglione, Nicholas Butch
Applied magnetic fields underlie exotic quantum states, such as the fractional quantum Hall effect 1 and Bose-Einstein condensation of spin excitations 2. Superconductivity, on the other hand, is inherently antagonistic towards magnetic fields. Only in

Coexistence of Ferromagnetic Fluctuations and Superconductivity in the Actinide Superconductor UTe 2

October 23, 2019
Author(s)
Shyam Sundar, S. Gheidi, K. Akintola, A. M. Cote, S. R. Dunsiger, S. Ran, Nicholas Butch, S. R. Saha, J. Paglione, J. E. Sonier
We report low-temperature muon spin relaxation/rotation (υSR) measurements on single crystals of the actinide superconductor UTe 2. Below 5 K we observe a continuous slowing down of magnetic fluctuations, which persists through the superconducting

Polarization-resolved Raman spectroscopy of \alpha-RuCl3 and evidence of room temperature two-dimensional magnetic scattering

October 14, 2019
Author(s)
Thuc T. Mai, Amber D. McCreary, P. Lampen-Kelley, Nicholas P. Butch, Jeffrey R. Simpson, J.-Q. Yan, S. E. Nagler, D. Mandrus, Angela R. Hight Walker, Rolando Valdes Aguilar
Polarization-resolved Raman spectroscopy was performed and analyzed from large, high quality, mono-domain single crystal of \alpha-RuCl3, a proximate Kitaev quantum spin liquid. Spectra were collected with laser polarizations parallel and perpendicular to

Field-Tunable Quantum Disordered Ground State in the Triangular-Lattice Antiferromagnet NaYbO 2

October 1, 2019
Author(s)
Mitchell M. Bordelon, Eric Kenney, Chunxiao Liu, Tom Hogan, Lorenzo Posthuma, Marzieh Kavand, Yuangqi Lyu, Mark Sherwin, Nicholas Butch, Craig Brown, M. J. Graf, Leon Balents, Stephen D. Wilson
One of the simplest routes to pursuing magnets with strong quantum fluctuations that quench conventional order is via decorating a triangular lattice with antiferromagnetically coupled S=1/2 moments. As disorder and anisotropies inherent in materials

Phonon Dispersion of Mo-stabilized -g-U measured using Inelastic X-ray Scattering

September 30, 2019
Author(s)
Z. E. Brubaker, Sheng NMN Ran, A. H. Said, M. E. Manley, P. Soderlind, D. Rosas, Y. Idell, R. J. Zieve, Nicholas Butch, J. R. Jeffries
We have measured the room-temperature phonon spectrum of Mo-stabilized γ−U. The dispersion curves show unusual softening near the H point, q=[1/2,1/2,1/2], which may derive from the metastability of the γ−U phase or from strong electron-phonon coupling

Nearly Ferromagnetic Spin-Triplet Superconductivity

August 18, 2019
Author(s)
Sheng N. Ran, Christoper Eckberg, Qing-Ping Ding, Yuji Furukawa, Tristin Metz, Shanta R. Saha, I Lin NMN Liu, Mark Zic, Hyunsoo Kim, Johnpierre N. Paglione, Nicholas Butch
One of the most interesting differences between spin triplet superconductors and the conventional spin singlet variety is the two-component triplet order parameter that allows spin up and down electrons to couple with different strength. Such nonunitary

Observation of Plasmon-Phonons in a Metamaterial Superconductor using Inelastic Neutron Scattering

July 24, 2019
Author(s)
Vera N. Smolyaninova, Jeffrey W. Lynn, Nicholas Butch, Heather H. Chen-Mayer, Joseph C. Prestigiacomo, M. S. Osofsky, Igor I. Smolyaninov
Recent experiments have demonstrated that the metamaterial approach is capable of drastically increasing the critical temperature, T c, of composite metal-dielectric epsilon near zero (ENZ) metamaterial superconductors. For example, a tripling of the

Quantum Spin Ice Dynamics in the Dipole-Octupole Pyrochlore Magnet Ce 2 Zr 2 O 7

May 7, 2019
Author(s)
Jonathan Gaudet, E. M. Smith, J. Dudemaine, J. Beare, C.R.C. Buhariwalla, Nicholas Butch, M. B. Stone, A. I. Kolesniko, Guangyong Xu, D. R. Yahne, K. A. Ross, C. A. Marjerrison, J. D. Garrett, G. M. Luke, A. D. Bianchi, B. D. Gaulin
Neutron scattering measurements on the pyrochlore magnet Ce 2Zr 2O 7 reveal an unusual crystal field splitting of its lowest J=5/2 multiplet, such that its ground state doublet is composed of m j= ± 3/2, giving these doublets a dipole - octupole (DO)

New Insights into Water Dynamics of Portland Cement Paste with Nano-Additives using Quasielastic Neutron Scattering

March 1, 2019
Author(s)
Kunal Kupwade-Patil, Ali Bumajdad, Craig Brown, Madhu Sudan Tyagi, Nicholas Butch, Abdullah F. Jamsheer, Oral Buyukozturk
Early age hydration kinetics of Portland cement with nano additives such as nano-silica (NS) was examined using quasielastic neutron scattering (QENS). Cement pastes with different ratios of Portland cement to NS was prepared. The concentration of the NS

High Temperature Singlet-Based Magnetism from Hund's Rule Correlations

February 7, 2019
Author(s)
Lin Miao, Rourav Basak, Sheng NMN Ran, Yishuai Xu, Erica Kotta, Haowei He, Jonathan D. Denlinger, Yi-De Chuang, Yang Zhao, Zhijun Xu, Jeffrey W. Lynn, J. R. Jeffries, Shanta Ranjan Saha, Ioannis Giannakis, Pegor Aynajian, Chang-Jong Kang, Yilin Wang, Gabriel Kotliar, Nicholas Butch, L. Andrew Wray
Novel electronic phenomena frequently form in heavy fermions as a consequence of the mutual nature of localization and itineracy of f-electrons. On the magnetically ordered side of the heavy fermion phase diagram, f-moments are expected to be localized and

Behavior of the Breathing Pyrochlore Lattice Ba 3 Yb 2 Zn 5 O 11 in Applied Magnetic Field

October 19, 2018
Author(s)
J. G. Rau, L. S. Wu, A. F. May, A. E. Taylor, I-Lin Liu, J. Higgins, Nicholas Butch, K. A. Ross, H. S. Nair, M. D. Lumsden, M. J. P. Gingras, A. D. Christianson
The breathing pyrochlore lattice material Ba 3Yb 2Zn 5O 11 exists in the nearly decoupled limit, in contrast to most other well-studied breathing pyrochlore compounds. Here we study the magnetic field dependent behavior of Ba 3Yb 2Zn 5O 11 at low

Mechanical Control of Crystal Symmetry and Superconductivity in Weyl Semimetal MoTe 2

July 30, 2018
Author(s)
Colin A Heikes, I Lin NMN Liu, Tristin Metz, Christoper Eckberg, Paul Michael Neves, Yan Wu, Linda NMN Hung, Phil Piccoli, Huibo Cao, Juscelino Leao, Johnpierre Paglione, Taner Yildirim, Nicholas P. Butch, William D. Ratcliff
The concept of topological order applied to condensed matter systems has inspired extensive experimental and theoretical searches for novel types of quantum matter. Topological superconductivity, where a bulk superconducting state and non-trivial topology
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