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Search Publications by: Nicholas Butch (Fed)

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Displaying 1 - 25 of 80

Single-Component Superconductivity in UTe2 at Ambient Pressure

July 21, 2023
Author(s)
Florian Theuss, Avi Shragai, Gael Grissonnanche, Ian Hayes, Shanta Saha, Yun Eo, Alonso Suaraz, Tatsuya Shishidou, Nicholas Butch, Johnpierre Paglione, B. Ramshaw
The microscopic mechanism of Cooper pairing in a superconductor leaves its fingerprint on the symmetry of the order parameter. UTe2 has been inferred to have a multi-component order parameter that entails exotic effects like time reversal symmetry breaking

Single-Component Superconductivity in UTe2 at Ambient Pressure

July 21, 2023
Author(s)
Florian Theuss, Avi Shragai, Gael Grissonnanche, Ian Hayes, Shanta Saha, Yun Eo, Alonso Suarez, Tatsuya Shishidou, Nicholas Butch, Johnpierre Paglione, B. Ramshaw
The microscopic mechanism of Cooper pairing in a superconductor leaves its fingerprint on the symmetry of the order parameter. UTe2 has been inferred to have a multi-component order parameter that entails exotic effects like time reversal symmetry breaking

Tuning a magnetic energy scale with pressure in UTe2

July 1, 2023
Author(s)
Hyunsoo Kim, I-Lin Liu, Wen-Chen Lin, Yun Eo, Sheng Ran, Nicholas Butch, Johnpierre Paglione
A fragile ordered state can be easily tuned by various external parameters. When the ordered state is suppressed to zero temperature, a quantum phase transition occurs, which is often marked by the appearance of unconventional superconductivity. While the

Detection of a Pair Density Wavestate in UTe2

June 28, 2023
Author(s)
Qiangqiang Gu, Joseph Carroll, Shuqiu Wang, Sheng Ran, Christopher Broyles, Hasan Siddiquee, Nicholas Butch, Shanta Saha, Johnpierre Paglione, J. Davis, Xiaolong Liu

Visualizing the melting of the charge density wave in UTe2 by generation of pairs of topological defects with opposite winding

June 15, 2023
Author(s)
Anuva Aishwarya, Julian May-Mann, Avior Almoalem, Sheng Ran, Shanta Saha, Johnpierre Paglione, Nicholas Butch, Eduardo Fradkin, Vidya Madhavan
Topological defects are singularities in an ordered phase that can have a profound effect on phase transitions and serve as a window into the order parameter. In this work we use scanning tunneling microscopy to visualize the role of topological defects in

Ubiquitous Spin Freezing in the Superconducting State of UTe2

February 1, 2023
Author(s)
Shyam Sundar, Nasrin Azari, Mariah Goeks, Shayan Gheidi, Mae Abedi, Michael Yakovlev, Sarah Dunsiger, John Wilkinson, Stephen Blundell, Tristin Metz, Ian Hayes, Shanta Saha, Sangyun Lee, Andrew Woods, Roman Movshovich, Sean Thomas, Nicholas Butch, Priscila Rosa, Johnpierre Paglione, Jeff Sonier

c-axis Transport in UTe2: Evidence of Three-Dimensional Conductivity Component

August 24, 2022
Author(s)
Yun S. Eo, Shouzheng Liu, Shanta Saha, Hyunsoo Kim, Sheng Ran, Jarryd A. Horn, Halyna Hodovanets, John Collini, Tristin Metz, Wesley T. Fuhrman, Andriy H. Nevidomskyy, Jonathan D. Denlinger, Nicholas Butch, Michael S. Fuhrer, L. A. Wray, Johnpierre Paglione
We study the temperature dependence of electrical resistivity for currents directed along all crystallographic axes of the spin-triplet superconductor UTe 2. We focus particularly on an accurate determination of the resistivity along the c-axis (ρ c) by

Towards Understanding the Magnetic Properties of the Breathing Pyrochlore Compound Ba 3 Yb 2 Zn 5 O 11 through Single-Crystal Studies

August 10, 2022
Author(s)
Sachith Dissanayake, Zhenzhong Shi, Jeffrey Rau, Rabindranath Bag, William Steinhardt, Nicholas Butch, Matthias Frontzek, Andrey Podlesnyak, David Graf, Casey Marjerrison, Jue Liu, Michel J. Gingras, Sara Haravifard
Ba 3Yb 2Zn 5O 11 is unique among breathing pyrochlore compounds for being in the nearly-decoupled limit where inter-tetrahedra interactions are weak, hosting isolated clusters or molecular magnet like tetrahedra of magnetic ytterbium (Ybu3+^) ions. In this

Magnetic-field sensitive charge density wave orders in the superconducting phase of UTe2

July 19, 2022
Author(s)
Anuva Aishwarya, Julian May-Mann, Arjun Raghavan, Laimei Nie, Marisa Romanelli, Sheng Ran, Shanta Saha, Johnpierre Paglione, Nicholas Butch, Eduardo Fradkin, Vidya Madhavan
The intense interest in triplet superconductivity partly stems from theoretical predictions of exotic excitations such as non-abelian Majorana modes, chiral supercurrents, and half-quantum vortices. However, fundamentally new, and unexpected states may

CHESS: The Future Direct Geometry Spectrometer at the Second Target Station

June 1, 2022
Author(s)
G. Sala, M. Mourigal, C. Boone, Nicholas Butch, A. Christianson, O. Delaire, A. J. DeSantis, C. L. Hart, R. Hermann, T. Huegle, D. N. Kent, J. Y. Lin, M. Lumsden, M. Manley, D. G. Quirinale, M. B. Stone, Y. Z.
CHESS is a planned direct geometry neutron chopper spectrometer designed to detect and analyze weak signals intrinsic to small cross-sections (e.g., small mass, small magnetic moments or neutron absorbing materials) in powders, liquids and crystals. CHESS

Symmetry of Magnetic Correlations in Spin-Triplet Superconductor UTe2

April 5, 2022
Author(s)
Nicholas Butch, Sheng Ran, Shanta Saha, Paul Neves, Mark P. Zic, Johnpierre N. Paglione, Yegor N. Vekhov, Sergiy Gladchenko, Jose Rodriguez Rivera
The temperature dependence of the low-energy magnetic excitations in the spin-triplet superconductor UTe2 was measured via inelastic neutron scattering in the normal and superconducting states. These excitations have a peak instensity at 4 meV, follow the

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

Global perspectives of the bulk electronic structure of URu2Si2 from angle-resolved photoemission

January 11, 2022
Author(s)
Jonathan Denlinger, J.-S. Kang, L. Dudy, J. Allen, Kyoo Kim, J.-H. Shim, Kristjan Haule, J. Sarrao, Nicholas Butch, M. Maple
Previous high-resolution angle-resolved photoemission (ARPES) studies of URu 2Si 2 have characterized the temperature-dependent behavior of narrow-band states close to the Fermi level (E F) at low photon energies near the zone center, with an emphasis on

Phase Diagram of YbZnGaO 4 in Applied Magnetic Field

September 15, 2021
Author(s)
William Steinhardt, P. A. Maksimov, Sachith Dissanayake, Zhenzhong Shi, Nicholas Butch, David Graf, Andrey Podlesnyak, Yaohua Liu, Yang Zhao, Guangyong Xu, Jeffrey Lynn, Casey Marjerrison, A. L. Chernyshev, Sara Haravifard
Recently, Yb-based triangular lattice antiferromagnets have garnered significant interest as possible quantum spin liquid candidates. One example is YbMgGaO 4, which showed many promising spin liquid features, but also possesses a high degree of disorder

The case for a U(1) p Quantum Spin Liquid Ground State in the Dipole-Octupole Pyrochlore Ce 2 Zr 2 O 7

September 7, 2021
Author(s)
E. Smith, O. Benton, D. Yahne, B. Placke, Jonathan Gaudet, J. Dudemaine, A. Fitterman, J. Beare, A. Wildes, S. Bhattacharya, T. DeLazzer, C.R.C. Buhariwalla, Nicholas Butch, R. Movshovich, J. Garrett, C. Marjerrison, J. Clancy, E. Kermarrec, G. Luke, A. Bianchi, K. A. Ross, B. Gaulin
The Ce3 + pseudospin-1/2 degrees of freedom in the pyrochlore magnet Ce 2Zr 2O 7 are known to possess dipole-octupole (DO) character, making it a candidate for novel quantum spin liquid (QSL) ground states at low temperatures. We report new heat capacity

Expansion of the High Field-Boosted Superconductivity in UTe 2 under Pressure

September 6, 2021
Author(s)
Sheng N. Ran, Shanta R. Saha, I-Lin Liu, David Graf, Johnpierre N. Paglione, Nicholas Butch
In semiclassical theory, the effect of quantized Landau levels on the critical magnetic field that destroys superconductivity is usually ignored. However, it has been theorized that the sharply enhanced density of states that occurs in extreme magnetic

Interplay between Magnetism and Superconductivity in UTe 2

August 22, 2021
Author(s)
Di Wei, David Saykin, Oliver Miller, Sheng Ran, Shanta Saha, Daniel Agterberg, Jorg Schmalian, Nicholas Butch, Johnpierre N. Paglione, Aharon Kapitulnik
Time-reversal symmetry breaking (TRSB) in UTe 2 was inferred from observations of a spontaneous Kerr response in the superconducting state after cooling in zero magnetic field, while a finite c-axis magnetic field training was further used to determine the

Evolution of Magnetic Interactions in Sb-Substituted MnBi 2 Te 4

August 2, 2021
Author(s)
S. Riberolles, Q. Zhang, Elijah Gordon, Nicholas Butch, Liqin Ke, J.-Q. Yan, R. McQueeney
The Mn(Bi 1−xSb x) 2Te 4 series is purported to span from antiferromagnetic (AF) topological insulator at x = 0 to a trivial AF insulator at x = 1. Here we report on neutron diffraction and inelastic neutron scattering studies of the magnetic interactions

Effects of aluminum content on thermoelectric performance of Al CoCrFeNi high-entropy alloys

June 15, 2021
Author(s)
Md Abdullah Al Hasan, Jiaqi Wang, Seungha Shin, Dustin A. Gilbert, Peter K. Liaw, Nan Tang, W. L. N. C. Liyanage, Louis Santodonato, Lisa Debeer-Schmitt, Nicholas Butch
Introducing a non-regular distribution in the mass and bonding by including distinctly different elements can reduce the phonon transport even within structurally well-ordered materials. These distributions are a quality of all high-entropy alloys (HEAs)