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Search Publications by: Nicholas Butch (Fed)

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Displaying 51 - 75 of 149

Quantum Phase Transitions in a Quasi-One-Dimensional Ising Quantum Magnet in Transverse Fields

April 15, 2021
Author(s)
Xiaowen Zhang, Zheng He, Yiqing Hao, Yao Shen, Shoudong Shen, Yu Feng, Guangyong Xu, Nicholas Butch, Goran J. Nilsen, Wenbin Wang, Jun Zhao
We report neutron scattering and thermodynamic measurements of the quasi-one-dimensional Ising magnet SrCo 2V 2O 8 under transverse fields along the tetragonal a/b direction. Our experiments reveal a Neel-type magnetic order in zero field, which

Frustrated Heisenberg J 1 -J 2 Model within the Stretched Diamond Lattice of LiYbO 2

January 14, 2021
Author(s)
Mitchell M. Bordelon, Chunxiao Liu, Lorenzo Posthuma, Eric Kenney, M. J. Graf, Nicholas Butch, Arnab Banerjee, Stuart Calder, Leon Balents, Stephen Wilson
We investigate the magnetic properties of LiYbO 2, containing a three-dimensionally frustrated, diamondlike lattice via neutron scattering, magnetization, and heat capacity measurements. The stretched diamond network of Yb 3+ ions in LiYbO 2 enters a long

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