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Physics

Condensed matter

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Displaying 126 - 150 of 2290

Exchange-Biased Quantum Anomalous Hall Effect

May 19, 2023
Author(s)
Peng Zhang, Purnima P. Balakrishnan, Christopher Eckberg, Peng Deng, Tomohiro Nozaki, Sukong Chong, Patrick Quarterman, Megan Holtz, Brian B. Maranville, Gang Qiu, Lei Pan, Eve Emmanouilidou, Ni Ni, Masashi Sahashi, Alexander Grutter, Kang L. Wang
The quantum anomalous Hall (QAH) effect is characterized by a dissipationless chiral edge state with a quantized Hall resistance at zero magnetic field. Manipulating the QAH state is of great importance in both the understanding of topological quantum

The Nature of Dynamic Local Order in CH 3 NH 3 Pbl 3 and CH 3 NH 3 PbBr 3

May 17, 2023
Author(s)
Nicholas Weadock, Tyler C. Sterling, Julian A. Vigil, Aryeh Gold-Parker, Ian C. Smith, Ballal Ahammed, Matthew Krogstad, Feng Ye, David Voneshen, Peter M. Gehring, Andrew M. Rappe, Hans-Georg Steinruck, Elif Ertekin, Hemamala I. Karunadasa, Dmitry Reznik, Michael F. Toney
Hybrid lead halide perovskites (LHPs) are a class of semiconductor with novel physical properties and impressive optoelectronic performance that are distinctively governed by structural fluctuations. [1, 2] Diffraction experiments sensitive to average

Orbital Character of the Spin-Reorientation Transition in TbMn6Sn6

May 9, 2023
Author(s)
S. X. Riberolles, Tyler Slade, Rebecca Dally, P. Sarte, Bing Li, Tianxiong Han, H. Lane, C. Stock, H. Bhandari, N. J. Ghimire, D. Abernathy, P. Canfield, Jeffrey Lynn, B. Ueland, R. McQueeney
TbMn 6Sn 6 is a topological ferrimagnet where the uniaxial anisotropy of the Tb 3+ ion generates out-of-plane magnetization of the ferromagnetic Mn kagome layer, resulting in the emergence of a two-dimensional Chern state. TbMn 6Sn 6 is also known to

Three-Dimensional Structure of Hybrid Magnetic Skyrmions Determined by Neutron Scattering

May 5, 2023
Author(s)
W. L. N. C. Liyanage, Nan Tang, Lizabeth J. Quigley, Julie A. Borchers, Alexander Grutter, Brian B. Maranville, Sunil Sinha, Nicolas Reyren, Sergio A. Montoya, Eric E. Fullerton, Lisa Debeer-Schmitt, Dustin A. Gilbert
Magnetic skyrmions are topologically protected chiral spin structures which present opportunities for next-generation magnetic data storage and logic information technologies. The topology of these structures originates in the geometric configuration of

Model Validation for Scanning Electron Microscopy

April 27, 2023
Author(s)
Olga Ridzel, Wataru Yamane, Ishiaka Mansaray, John S. Villarrubia
We are beginning projects to validate the physics models used for interpretation of electron microscopy images. In one, we will measure electron yields and energy spectra from cleaned well-characterized samples subjected to electron bombardment inside of a

Beyond Single Tetrahedron Physics of the Breathing Pyrochlore Compound Ba 3 Yb 2 Zn 5 O 11

April 20, 2023
Author(s)
Rabindranath Bag, Sachith Dissanayake, Han Yan, Zhenzhong Shi, David Graf, Eun S. Choi, Casey Marjerrison, Franz Lang, Tom Lancaster, Yiming Qiu, Wangchun Chen, Stephen J. Blundell, Andriy H. Nevidomskyy, Sara Haravifard
Recently a new class of quantum magnets, the so-called breathing pyrochlore systems, have attracted much attention due to their potential to host exotic emergent phenomena. Here, we present magnetometry, thermal, muon-spin relaxation, and polarized

Rydberg Excitons and Trions in Monolayer MoTe2

April 12, 2023
Author(s)
Souvik Biswas, Aurelie Champagne, Jonah Haber, supavit pokawanvit, Joeson Wong, Hamidreza Akbari, Sergiy Krylyuk, Kenji Watanabe, Albert Davydov, Zakaria Al Balushi, Felipe H. da Jornada, Diana Qiu, Jeffrey Neaton, Harry Atwater
Monolayer transition metal dichalcogenide (TMDC) semiconductors exhibit strong excitonic optical resonances which serve as a microscopic, non-invasive probe into their fundamental properties. Like the hydrogen atom, such excitons can exhibit an entire

Antiferromagnetic Metal Phase in an Electron-Doped Rare-Earth Nickelate

April 1, 2023
Author(s)
Qi Song, Spencer Doyle, Grace Pan, Ismail El Baggari, Dan Segedin, Denisse Cordova Carrizales, Johanna Nordlander, Christian Tzschaschel, James Ehrets, Zubia Hasan, Hesham El-Sherif, Jyoti Krishna, Chase Hanson, Harrison LaBollita, Aaron Bostwick, Chris Jozwiak, Eli Rotenberg, Su-Yang Xu, Alessandra Lanzara, Alpha N'Diaye, Colin Heikes, Yaohua Liu, Hanjong Paik, Charles Brooks, Betul Pamuk, John Heron, Padraic Shafer, William D. Ratcliff, Antia Botana, Luca Moreschini, Julia A. Mundy
Long viewed as passive elements, antiferromagnetic materials emerged as promising candidates for spintronic devices due to their insensitivity to external fields and potential for high-speed switching. Recent work in spin orbitronics has identified ways to

Absence of Magnetic Interactions in Ni-Nb Ferromagnet-Superconductor Bilayers

March 28, 2023
Author(s)
Nathan Satchell, Patrick Quarterman, Julie A. Borchers, Gavin Burnell, Norman Birge
Studies of ferromagnet-superconductor hybrid systems have uncovered magnetic interactions between the competing electronic orderings. The Electromagnetic Proximity Effect predicts the formation of a spontaneous vector potential inside a superconductor

Interference induced anisotropy in a two-dimensional dark state optical lattice

March 27, 2023
Author(s)
Ian Spielman, Gediminas Juzeliunas, Edvinas Gvozdiovas
We describe a two-dimensional optical lattice for ultracold atoms with spatial structure below the diffraction limit created by a bichromatic optical standing wave. At every point in space these fields couple the internal atomic states in a three-level

Stripe Helical Magnetism and Two Regimes of Anomalous Hall Effect in NdAlGe

March 27, 2023
Author(s)
Hung-Yu Yang, Jonathan N. Gaudet, Rahul Verma, Santu Baidya, Faranak Bahrami, Xiaohan Yao, Cheng-Yi Huang, Lisa Debeer-Schmitt, Adam A. Aczel, Guangyong Xu, Hsin Lin, Arun Bansil, Bahadur Singh, Fazel Tafti
We report the magnetic and electronic transport properties of the inversion and time-reversal symmetry breaking Weyl semimetal NdAlGe. This material is analogous to NdAlSi whose helicalmagnetism is a rare example of a Weyl-mediated collective phenomenon

Spin-orbital order and excitons in magnetoresistive HoBi

March 22, 2023
Author(s)
Jonathan N. Gaudet, H. Yang, E. Smith, T. Halloran, J. Clancy, Jose Rodriguez Rivera, Guangyong Xu, Yang Zhao, Wangchun Chen, G. Sala, Adam A. Aczel, B. Gaulin, Fazel Tafti, Collin L. Broholm
The magnetism of the rock-salt fcc rare-earth monopnictide HoBi, a candidate topological material with extreme magnetoresistance, is investigated. From the Ho3+ non-Kramers J=8 spin-orbital multiplet, the cubic crystal electric field yields six near
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