Joel Helton

Publications

Three-Dimensional Magnetism and the Dzyaloshinskii-Moriya Interaction in S=3/2 Kagome Staircase Co₃V₂O₈

May 1, 2020

Author(s)

Joel Helton, Nicholas P. Butch, Daniel M. Pajerowski, Sergei N. Barilo, Jeffrey W. Lynn

Time-of-flight neutron spectroscopy reveals spin waves in the ferromagnetic ground state of the kagome staircase material Co32V2O8. While previous work has

Damping and Softening of Transverse Acoustic Phonons in Colossal Magnetoresistive La_0.7Cad0.3^MnO₃ and La_0.7Sr_0.3MnO₃

January 7, 2019

Author(s)

Joel Helton, Yang Zhao, Dmitry A. Shulyatev, Jeffrey W. Lynn

Neutron spectroscopy is used to probe transverse acoustic phonons near the (2,2,0) Bragg position in colossal magnetoresistive La0.7Ca0.3MnO3. Upon warming to

Spin Wave Damping Arising from Phase Coexistence below Τ_c in Colossal Magnetoresistive La_0.7Ca_.03MnO₃

September 13, 2017

Author(s)

Joel Helton, Susumu K. Jones, Daniel E Parshall, Matthew B. Stone, Dmitry A. Shulyatev, Jeffrey W. Lynn

While the spin dynamics of La0.7Cad0.3MnO3 in the ferromagnetic phase are known to be unconventional, previous measurements have yielded contradictory results

Correlated Impurities and Intrinsic Spin-Liquid Physics in the Kagome Material Herbertsmithite

August 18, 2016

Author(s)

Tian-Heng Han, M. R. Norman, J.-J. Wen, Jose Rodriguez Rivera, Joel Helton, Collin L. Broholm, Young S. Lee

New low energy inelastic neutron scattering data on the kagome spin liquid ZnCu3(OD)6Cl2 (Herbertsmithite) reveals diffuse spots near wavevectors (100) and 003

Magnetic Transitions in the Topological Magnon Insulator Cu(1,3-bdc)

June 2, 2016

Author(s)

Robin Michael Daub Chisnell, Joel Helton, D. E. Freedman, D. K. Singh, F. Demmel, Chris Stock, D. G. Nocera, Y. S. Lee

Topological magnon insulators are a new class of magnetic materials that posses topologically nontrivial magnon bands. As a result, magnons in these materials

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Joel Helton (Fed)

Publications