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Physics

Condensed matter

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Displaying 251 - 275 of 1260

Understanding Reentrance in Frustrated Magnets: The Case of the Er 2 Sn 2 O 7 Pyrochlore

December 30, 2021
Author(s)
D. R. Yahne, D. Pereira, L. D. Jaubert, L. D. Sanjeewa, M. Powell, J. W. Kolis, Guangyong Xu, M. Enjalran, M. J. Gingras, K. A. Ross
Reentrance is a recurring theme found in a variety of physical systems, including spin glasses and black hole thermodynamics, yet the underlying microscopic mechanisms leading to it are rarely investigated in detail. Here we provide a detailed

Growth and Characterization of Large (Y,La)TiO 3 and (Y,Ca)TiO 3 Single Crystals

December 29, 2021
Author(s)
Sajna Hameed, Joseph Joe, Laxman Thoutam, Javier Garcia Barriocanal, Biqiong Yu, Guichuan Yu, S. Chi, Tao Hong, Travis Williams, John W. Freeland, Peter M. Gehring, Zhijun Xu, Masaaki Matsuda, Bharat Jalan, Martin Greven
The Mott-insulating rare-earth titanates (RTiO 3, R being a rare-earth ion) are an important class of materials that encompasses interesting spin-orbital phases, ferromagnet-antiferromagnet and insulator-metal transitions. The growth of these materials has

Spin Dynamics in the Skyrmion-Host Lacunar Spinel GaV 4 S 8

December 20, 2021
Author(s)
G. Pokharel, H. Arachchige, S. Gao, S.-H. Do, R. Fishman, G. Ehlers, Yiming Qiu, Jose Rodriguez Rivera, M. B. Stone, H. Zhang, Stephen Wilson, D. Mandrus, A. Christianson
In the lacunar spinel GaV 4S 8, the interplay of spin, charge, and orbital degrees of freedom produces a rich phase diagram that includes an unusual Neel-type skyrmion phase composed of molecular spins. To provide ´ insight into the interactions underlying

Elucidating the local atomic and electronic structure of amorphous oxidized superconducting niobium films

December 16, 2021
Author(s)
Thomas Harrelson, Evan Sheridan, Ellis Kennedy, John Vinson, Alpha N'Diaye, M. Altoe, Alex Weber-Bargioni, Adam Schwartzberg, Irfan Siddiqi, D. Ogletree, Mary Scott, Sinead Griffin
Qubits made from superconducting materials are a mature platform for quantum information science application such as quantum computing. However, materials-based losses are now a limiting factor in reaching the coherence times needed for applications. In

Universal Dynamics of Magnetic Monopoles in Two-Dimensional Kagome Ice

December 15, 2021
Author(s)
Hiroshi Takatsu, Kazuki Goto, Taku J. Sato, Jeffrey W. Lynn, Kazuyuki Matsubayashi, Yoshiya Uwatoko, Ryuji Higashinaka, Kazuyuki Matsuhira, Zenji Hiroi, Hiroaki Kadowaki
A magnetic monopole in spin ice is a novel quasiparticle excitation in condensed matter physics, and we found that the AC frequency dependent magnetic susceptibility X(ω) in the two-dimensional (2D) spin ice (so-called kagome ice) of Dy 2Ti 2O 7 shows a

Spin and Charge Interconversion in Dirac-Semimetal Thin Films

November 16, 2021
Author(s)
Wilson Yanez, Yongxi Ou, Run Xiao, Jahyun Koo, Jacob T. Held, Supriya Ghosh, Jeffrey Rable, Timothy Pillsbury, Enrique Gonzalez Delgado, Kezhou Yang, Juan Chamorro, Alexander Grutter, Patrick Quarterman, Anthony Richardella, Abhronil Sengupta, Tyrel M. McQueen, Julie Borchers, K. A. Mkhoyan, Binghai Yan, Nitin Samarth
We report spin-to-charge and charge-to-spin conversion at room temperature in heterostructure devices that interface an archetypal Dirac semimetal, Cd 3As 2, with a metallic ferromagnet,Ni 0.80Fe 0.20 (permalloy). The spin-charge interconversion is

Dual current anomalies and quantum transport within extended reservoir simulations

October 19, 2021
Author(s)
Gabriela Wojtowicz, Justin E. Elenewski, Marek Rams, Michael P. Zwolak
Quantum transport simulations are rapidly evolving, including the development of well–controlled tensor network techniques for many– body transport calculations. One particularly powerful approach combines matrix product states with extended reservoirs —

Magnetic Field-Induced Non-Trivial Electronic Topology in Fe 3-x GeTe 2

October 7, 2021
Author(s)
Juan Macy, Danilo Ratkovski, Purnima P. Balakrishnan, Mara Strungaru, Yu-Che Chiu, Aikaterini Flessa, Alex Moon, Wenkai Zheng, Ashley Weiland, Gregory T. McCandless, Julia Y. Chan, Govind S. Kumar, Michael Shatruk, Alexander Grutter, Julie Borchers, William D. Ratcliff, Eun S. Choi, Elton J. Santos, Luis Balicas
The anomalous Hall, Nernst and thermal Hall coefficients of the itinerant ferromagnet Fe 3−xGeTe 2 display several features upon cooling, like a reversal in the Nernst signal below T = 50 K pointing to a topological transition possibly associated to the

Performance of Reservoir Discretizations in Quantum Transport Simulations

September 29, 2021
Author(s)
Justin E. Elenewski, Gabriela Wojtowicz, Marek Rams, Michael P. Zwolak
Quantum transport simulations require a level of discretization, often achieved through an explicit representation of the electronic reservoirs. These representations should converge to the same continuum limit, though there is a trade-off between a given

Magnetic Properties and Signatures of Ordering in Triangular Lattice Antiferromagnet KCeO 2

September 15, 2021
Author(s)
Mitchell M. Bordelon, Xiaoling Wang, Daniel M. Pajerowski, Arnab Banerjee, Mark Sherwin, Craig Brown, M. Eldeeb, T. Petersen, L. Hozoi, U. Robler, Martin Mourigal
The magnetic ground state and the crystalline electric field level scheme of the triangular lattice antiferromagnet KCeO 2are investigated. Below T N = 300 mK, KCeO 2 develops signatures of magnetic order in specific heat measurements and low energy

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

Experimental confirmation of long hyperbolic polariton lifetimes in monoisotopic (10B) hexagonal boron nitride at room temperature

September 14, 2021
Author(s)
Georges Pavlidis, Jeffrey Schwartz, Joseph Matson, Thomas Folland, Song Liu, James Edgar, Joshua Caldwell, Andrea Centrone
Hyperbolic phonon polaritons (HPhPs) enable arbitrarily high confinements, low losses, and directional propagation – providing opportunities from hyperlensing to flat optics, and other advanced nanophotonics applications. In this work, two near-field

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
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