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Physics

Condensed matter

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Displaying 276 - 300 of 1260

Magnetic proximity effect in magnetic-insulator/heavy-metal heterostructures across the compensation temperature

September 1, 2021
Author(s)
Jackson Bauer, Patrick Quarterman, Alexander Grutter, Bharat Khurana, Subhajit Kundu, K. Mkhoyan, Julie A. Borchers, Caroline Ross
The magnetic proximity effect in Pt and W thin films grown on Dy3Fe5O12 (DyIG) is examined at temperatures above and below the magnetic compensation temperature of the ferrimagnetic insulator. Polarized neutron reflectometry indicates that the proximity

X-ray spectroscopic and first principles investigation of lead tungstate under pressure

August 26, 2021
Author(s)
Eric L. Shirley, Eric J. Cockayne, Joseph Woicik, James M. Ablett
High-energy-resolution fluorescence-detected (HERFD) near-edge x-ray absorption fine structure measurements performed at the Pb and W L3 absorption edges has been used to study the pressure dependence of the local atomic structure of PbWO4 from 0 GPa to 22

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

Weyl-mediated helical magnetism in NdAlSi

August 19, 2021
Author(s)
Jonathan Gaudet, Hung-Yu Yang, Santu Baidya, Baozhu Lu, Guangyong Xu, Yang Zhao, Jose Rodriguez Rivera, Christina M. Hoffman, David E. Graf, Darius H. Torchinsky, Predrag Nikolic, David Vanderbilt, Fazel Tafti, Collin L. Broholm
Emergent relativistic quasiparticles in Weyl semimetals are the source of exotic electronic properties such as surface Fermi arcs, the anomalous Hall effect and negative magnetoresistance, all observed in real materials. Whereas these phenomena highlight

E 8 Spectra of Quasi-One-Dimensional Antiferromagnet BaCo 2 V 2 O 8 under Transverse Field

August 9, 2021
Author(s)
Haiyuan Zou, Y. Cui, Xiao Wang, Z. Zhang, J. Yang, Guangyong Xu, A. Okutani, M. Hagiwara, M. Matsuda, G. Wang, Giuseppe Mussardo, K. Hodsagi, M. Kormos, Zhangzhen He, S. Kimura, Rong Yu, Weiqiang Yu, Jie Ma, Jianda Wu
Exotic excitations can emerge in the vicinity of a quantum phase transition. When the quantum critical point of the one-dimensional (1D) transverse field Ising model is perturbed by a longitudinal magnetic field, it was predicted that its massive

Evaluating the Effects of Structural Disorder on the Magnetic Properties of Nd 2 Zr 2 O 7

August 9, 2021
Author(s)
Eli Zoghlin, Julian Schmehr, Collin Holgate, Rebecca Dally, Yaohua Liu, Geneva Laurita, Stephen Wilson
Motivated by the variation in reported lattice parameters of floating-zone-grown Nd 2Zr 2O 7 crystals, we have performed a detailed study of the relationship between synthesis environment, structural disorder, and magnetic properties. Using a combination

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

De-excitation dynamics of muonic atoms revealed by high precision spectroscopy of electronic K x rays using a superconducting transition-edge sensor microcalorimeter

July 27, 2021
Author(s)
Douglas Bennett, W.Bertrand (Randy) Doriese, Malcolm Durkin, Joseph Fowler, Johnathon Gard, Gene C. Hilton, Kelsey Morgan, Galen O'Neil, Carl D. Reintsema, Dan Schmidt, Daniel Swetz, Joel Ullom, Toshiyuki Azuma, Pietro Caradonna, I-Huan Chiu, Tadashi Hashimoto, Ryota Hayakawa, Yuto Ichinohe, Paul Indelicato, TadaAki Isobe, Sohtaro Kanda, Daiji Kato, Miho Katsuragawa, Naritoshi Kawamura, Yasushi Kino, Kenya Kubo, Kairi Mine, Yasuhiro Miyake, Kazuhiko Ninomiya, Hirofumi Noda, Shinji Okada, Takuma Okumura, Kenichi Okutsu, Takahito Osawa, Nancy Paul, Kouichiro Shimomura, Patrick Strasser, Hirotaka Suda, Tadayuki Takahashi, Shinichiro Takeda, Soshi Takeshita, Motonobu Tampo, Hideyuki Tatsuno, XiaoMin Tong, Yasuhiro Ueno, Shin Watanabe, Shinya Yamada
We observed electronic K x rays emitted from muonic iron atoms using a superconducting transition-edge-type sensor microcalorimeter. The energy resolution of 5.2 eV in FWHM allowed us to observe the asymmetric broad profile of the electronic characteristic

Magnetic Structure, Excitations and Short-Range order in Honeycomb Na 2 Ni 2 TeO 6

July 15, 2021
Author(s)
Nathan Episcopo, Po-Hao Chang, Thomas W. Heitmann, Kinley Wangmo, James M. Guthrie, Magdalena Fitta, Ryan Klein, Narayan Poudel, Krzysztof Gofryk, Rajendra R. Zope, Craig Brown, Harikrishnan S. Nair
Na 2Ni 2TeO 6 has a layered hexagonal structure with a honeycomb lattice constituted by Ni 2+ and a chiral charge distribution of Na + that resides between the Ni layers. In the present work, the antiferromagnetic transition temperature of Na 2Ni 2TeO 6 is

Dynamic Crossover in Fluids: From Hard Spheres to Molecules

July 7, 2021
Author(s)
Ian Bell, Stephanie Delage-Santacreu, Hai Hoang, Guillaume Galliero
We propose a simple and generic definition of a demarcation reconciling structural and dynamic frameworks when combined with the entropy scaling framework. This crossover line between gas- and liquid-like behaviors is defined as the curve for which an

Coulombically-stabilized oxygen hole polarons enable fully reversible oxygen redox

July 1, 2021
Author(s)
Iwnetim I. Abate, Chaitanya D. Pemmaraju, Se-Young Kim, Sami Sainio, Brian Moritz, John Vinson, Michael F. Toney, Wanli Yang, William E. Gent, Thomas P. Devereaux, Linda F. Nazar, William C. Chueh
Stabilizing high-valent redox couples and exotic electronic states necessitates an understanding of the stabilization mechanism. In oxides, whether they are being considered for energy storage or computing, highly oxidized oxide-anion species rehybridize

Polarization Effects of X-ray Monochromators Modeled Using Dynamical Scattering Theory

July 1, 2021
Author(s)
Marcus Mendenhall, David R. Black, Donald Windover, James Cline
The difference in the diffracted intensity of the sigma-and pi-polarized components of an X-ray beam in powder diffraction has generally been treated according to equations based on dipole scattering, also known as kinematic X-ray scattering. Although this

Two-Dimensional Overdamped Fluctuations of the Soft Perovskite Lattice in CsPbBr 3

July 1, 2021
Author(s)
T. Lanigan-Atkins, X. He, M. Krogstad, D. M. Pajerowski, D. Abernathy, Guangyong Xu, Zhijun Xu, D.-Y. Chung, M. G. Kanatzidis, S. Rosenkranz, R. Osborn, O. Delaire
Lead halide perovskites exhibit structural instabilities and large atomic fluctuations thought to impact their optical and thermal properties, yet detailed structural and temporal correlations of their atomic motions remain poorly understood. Here, these

Freezing of a Disorder Induced Spin Liquid with Strong Quantum Fluctuations

June 29, 2021
Author(s)
Xiao Hu, Daniel M. Pajerowski, Depei Zhang, Andrey Podlesnyak, Yiming Qiu, Qing Huang, Haidong Zhou, Israel Klich, Alexander I. Kolesnikov, M. B. Stone, Seung-Hun Lee
Sr 2CuTe 0.5W 0.5O 6 is a square-lattice magnet with super-exchange between S = 1/2 Cu 2+ spins mediated by randomly distributed Te and W ions. Here, using sub-K temperature and 20 µeV energy resolution neutron scattering experiments we show that this

A Large Beam High Efficiency Radio Frequency Neutron Spin Flipper

June 21, 2021
Author(s)
Wangchun Chen, Ross W. Erwin, Peter Tsai, Md. T. Hassan, Nancy Hadad, Charles F. Majkrzak
A design for a radio-frequency (RF) neutron spin flipper obtained from magneto-static and neutron spin transport simulations is presented. The RF flipper constructed from this design provides a flipping probability of 0.999 or better for a beam size 6 cm
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