Article
Materials Science, Multidisciplinary
T. M. Batistel, J. Brandao
Summary: In this work, we investigate the nucleation and stability of spin textures in synthetic antiferromagnetic nanodot-shaped systems. By using micromagnetic simulations, we identify different spin textures such as antiferromagnetic single domain, skyrmion, and skyrmionium states, depending on the magnetic and geometric parameters of the circular disk. We also explore the stability of magnetization reversal under out-of-plane magnetic fields and find that AFM skyrmionic textures can be preserved under specific conditions in the absence of magnetic fields.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Souren Adhikary, Sudipta Dutta, Sasmita Mohakud
Summary: Researchers have discovered a new antiferromagnetic ground state in two-dimensional materials, achieved through elemental substitution to induce Fermi instability, resulting in a unique spin structure in defect-free two-dimensional materials made of only p-block elements.
NANOSCALE ADVANCES
(2021)
Article
Nanoscience & Nanotechnology
Kang Wang, Vineetha Bheemarasetty, Gang Xiao
Summary: Spin textures, such as magnetic domain walls and skyrmions, have the potential to revolutionize electronic devices by encoding information bits. Antiferromagnetic spin textures offer a solution to material-related drawbacks in ferromagnetic films, paving the way for faster, smaller, more energy-efficient, and more robust electronics. Synthetic antiferromagnets, comprised of two or more magnetic layers separated by spacers, can have their functionality easily manipulated through different materials and interface engineering.
Article
Multidisciplinary Sciences
Aurore Finco, Angela Haykal, Rana Tanos, Florentin Fabre, Saddem Chouaieb, Waseem Akhtar, Isabelle Robert-Philip, William Legrand, Fernando Ajejas, Karim Bouzehouane, Nicolas Reyren, Thibaut Devolder, Jean-Paul Adam, Joo-Von Kim, Vincent Cros, Vincent Jacques
Summary: By utilizing a quantum magnetometer based on a single NV center, the researchers have successfully demonstrated the all-optical imaging of antiferromagnetic spin textures. Through variations in the NV spin relaxation rate, they were able to image AFM domain walls and skyrmions.
NATURE COMMUNICATIONS
(2021)
Article
Physics, Applied
Moh. Adhib Ulil Absor, Iman Santoso
Summary: The recent discovery of materials hosting persistent spin texture (PST) opens up new possibilities for energy-saving spintronics. However, the stability of PST is affected by symmetry breaking induced by external perturbations like electric fields. In this paper, the authors report the emergence of a stable PST in a two-dimensional ferroelectric bilayer WTe2, which can be effectively controlled by an out-of-plane external electric field. These findings offer a promising platform for highly efficient and non-volatile spintronic devices.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Physics, Multidisciplinary
Shutaro Karube, Takahiro Tanaka, Daichi Sugawara, Naohiro Kadoguchi, Makoto Kohda, Junsaku Nitta
Summary: The study investigates the generation of spin-splitter torque in collinear antiferromagnetic RuO2, revealing different spin current polarizations on various crystal planes. By utilizing this spin-splitter torque, field-free switching of ferromagnetic materials can be achieved, contributing to the development of antiferromagnetic spin-orbitronics.
PHYSICAL REVIEW LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Xinran Liu, Hong Jian Zhao, Laurent Bellaiche, Yanming Ma
Summary: This article demonstrates the occurrence of sizable Zeeman spin splittings with persistent spin textures in antiferromagnetic semiconductors. By symmetry analysis, the magnetic point groups that can exhibit this effect are identified, providing theoretical guidelines for screening suitable antiferromagnetic materials. First-principles calculations confirm CaTcO3 as an antiferromagnetic semiconductor showcasing sizable Zeeman spin splittings that may be controllable by a magnetic field and accompanied by persistent spin textures.
Article
Multidisciplinary Sciences
Ruwan Senaratne, Danyel Cavazos-Cavazos, Sheng Wang, Feng He, Ya-Ting Chang, Aashish Kafle, Han Pu, Xi-Wen Guan, Randall G. Hulet
Summary: Confining ultracold atoms to periodic potentials is a powerful method for simulating complex many-body systems. In this study, we confined fermions to one dimension to realize the Tomonaga-Luttinger liquid model and observed a velocity shift of spin and charge excitations in opposite directions, indicating the existence of spin-charge separation.
Article
Chemistry, Physical
Amal Aldarawsheh, Moritz Sallermann, Muayad Abusaa, Samir Lounis
Summary: Topological antiferromagnetism is a vibrant research field aiming to identify topologically protected magnetic states. This study predicts new chiral particles, exchange-frustrated multimeronic spin textures, hosted by a Ne'el magnetic state in single AFM materials. These structures have distinct topological charges and enhanced stability against external magnetic fields.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Optics
Peng Shi, Luping Du, Mingjie Li, Xiaocong Yuan
Summary: This research proposes a theoretical framework to show that photonic chiral spin textures in optical interfaces originate from the system's symmetry and relativity. The analysis of rotational symmetry in optical systems reveals the crucial role of the local spin momentum distribution in the chiral twisting of local spin vectors.
LASER & PHOTONICS REVIEWS
(2021)
Article
Optics
Zheng Gao, Lianyi He, Huaisong Zhao, Shi-Guo Peng, Peng Zou
Summary: We calculate the density dynamic structure factor of one-dimensional Fermi superfluid with Raman-type spin-orbit coupling and analyze its main dynamical characteristics during the phase transition between Bardeen-Cooper-Schrieffer superfluid and topological superfluid. Our results show four types of single-particle excitations induced by the two-branch structure of the single-particle spectrum, and the cross single-particle excitation is more easily observed in the spin dynamic structure factor at a small transferred momentum. Additionally, we observe a new rotonlike collective mode at a fixed transferred momentum q similar to 2(k)F, which only appears in the topological superfluid state.
Article
Nanoscience & Nanotechnology
Ssu-Yuan Wang, Sheng-Huai Chen, Hao-Kai Chang, Yi-Ting Li, Chih-Hsiang Tseng, Po-Chuan Chen, Chao-Yao Yang, Chih-Huang Lai
Summary: This study investigates how to activate stochasticity/memristivity in a spin-orbit torque device. By manipulating the antiferromagnetic order, the strength of Dzyaloshinskii-Moriya interaction in the device can be controlled to behave as either a stochastic cell or a memristive cell.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Physics, Multidisciplinary
Annabelle Bohrdt, Lukas Homeier, Immanuel Bloch, Eugene Demler, Fabian Grusdt
Summary: Studies suggest that high-temperature pairing of fermions can be achieved in bilayer models, utilizing the energy gained by one charge when it follows the path created by another charge.
Article
Physics, Multidisciplinary
Genwang Fan, Xiao-Long Chen, Peng Zou
Summary: In this theoretical study, we investigate the Higgs oscillation in a one-dimensional Raman-type spin-orbit-coupled Fermi superfluid using the time-dependent Bogoliubov-de Gennes equations. By linearly ramping or abruptly changing the effective Zeeman field in both the Bardeen-Cooper-Schrieffer state and the topological superfluid state, we find that the amplitude of the order parameter exhibits an oscillating behavior over time with two different frequencies. We further verify the existence of these two Higgs oscillations using a periodic ramp strategy with theoretically calculated driving frequency. Our predictions would be useful for further theoretical and experimental studies of these Higgs oscillations in spin-orbit-coupled systems.
FRONTIERS OF PHYSICS
(2022)
Article
Physics, Applied
Hui Zhang, Zengtai Zhu, Yungu Zhu, Xiaobing Chen, Qisheng Jiang, Jinwu Wei, Chenbo Zhao, Jine Zhang, Furong Han, Huaiwen Yang, Dapeng Zhu, Hao Wu, Yuansha Chen, Fengxia Hu, Baogen Shen, Weisheng Zhao, Jing Zhang, Guoqiang Yu, Jirong Sun
Summary: This study investigates metallic 2DEGs in gamma-Al2O3/KTaO3 heterostructures and explores the impact of Fermi level on charge-to-spin conversion. The results show that optimizing the Fermi level can greatly enhance the conversion efficiency.
PHYSICAL REVIEW APPLIED
(2023)
Article
Physics, Multidisciplinary
Jiri Minar, Sebnem Gunes Soyler, Pietro Rotondo, Igor Lesanovsky
NEW JOURNAL OF PHYSICS
(2017)
Article
Physics, Multidisciplinary
Maike Ostmann, Jiri Minar, Matteo Marcuzzi, Emanuele Levi, Igor Lesanovsky
NEW JOURNAL OF PHYSICS
(2017)
Article
Physics, Multidisciplinary
Matteo Marcuzzi, Jiri Minar, Daniel Barredo, Sylvain de Leseleuc, Henning Labuhn, Thierry Lahaye, Antoine Browaeys, Emanuele Levi, Igor Lesanovsky
PHYSICAL REVIEW LETTERS
(2017)
Article
Physics, Multidisciplinary
Natalia Chepiga, Jiri Minar, Kareljan Schoutens
Summary: In this study, a superfrustrated model is deformed from the supersymmetric point to explore the exotic phenomena and ground state degeneracy in constrained fermion lattice models. The phase diagram reveals a rich phenomenology with features such as period-4 and period-5 density waves connected by a floating phase, and a multicritical point at the supersymmetric point. The transitions out of density-wave phases show consistency with the Pokrovsky-Talapov universality class, and a period-3 phase with a competition between single and two-particle instabilities is identified.
Article
Physics, Multidisciplinary
Jiri Minar, Bart van Voorden, Kareljan Schoutens
PHYSICAL REVIEW LETTERS
(2020)
Article
Multidisciplinary Sciences
Chun-Chia Chen, Rodrigo Gonzalez Escudero, Jiri Minar, Benjamin Pasquiou, Shayne Bennetts, Florian Schreck
Summary: This study demonstrates the continuous existence of Bose-Einstein condensates by continuously amplifying atoms from a thermal bath. By steadily replenishing the bath and increasing the phase-space density, this experiment provides a missing piece for the construction of continuous coherent-matter-wave devices.
Article
Optics
Aaron Merlin Mueller, Miklos Lajko, Florian Schreck, Frederic Mila, Jiri Minar
Summary: The study investigates species-selective cooling of a trapped SU(N) Fermi gas through entropy redistribution during adiabatic loading of an optical lattice, demonstrating improved cooling effects. Optimal performance is achieved when all atomic levels experience the same potential, outside of a specific dimple region. Specific quantitative discussions on achieving state-selective trapping in Sr-87 and Yb-173 using existing experimental techniques are provided.
Article
Materials Science, Multidisciplinary
Bart van Voorden, Matteo Marcuzzi, Kareljan Schoutens, Jiri Minar
Summary: The model considers facilitated Rydberg chains with positional disorder, featuring a Hilbert space with the topology of a d-dimensional hypercube. Integrability-breaking disorder enhances scars and inhibits dynamics due to strong localization of eigenstates in the large disorder limit. Mapping the model to the spin-1/2 XX Heisenberg chain provides a geometrical perspective on the Onsager scars, identifying them with scars on the edge of the Hilbert space and revealing their insensitivity to certain types of disorder perturbations.
Article
Materials Science, Multidisciplinary
Bart van Voorden, Jiri Minar, Kareljan Schoutens
Article
Optics
Andreas Kouzelis, Katarzyna Macieszczak, Jiri Minar, Igor Lesanovsky
Proceedings Paper
Mechanics
C. Burrage, C. Kading, P. Millington, J. Minar
9TH INTERNATIONAL WORKSHOP DICE2018: SPACETIME - MATTER - QUANTUM MECHANICS
(2019)
Article
Astronomy & Astrophysics
Clare Burrage, Christian Kading, Peter Millington, Jiri Minar
Article
Quantum Science & Technology
Maike Ostmann, Matteo Marcuzzi, Jiri Minar, Igor Lesanovsky
QUANTUM SCIENCE AND TECHNOLOGY
(2019)
Article
Materials Science, Multidisciplinary
P. Rotondo, J. Minar, J. P. Garrahan, I Lesanovsky, M. Marcuzzi
Article
Optics
Robert J. Bettles, Jiri Minar, Charles S. Adams, Igor Lesanovsky, Beatriz Olmos