Article
Physics, Multidisciplinary
Emil Vinas Bostroem, Tahereh Sadat Parvini, James W. McIver, Angel Rubio, Silvia Viola Kusminskiy, Michael A. Sentef
Summary: Controlling edge states of topological magnon insulators is a promising route to stable spintronics devices. However, experimentally determining the topology of magnon bands is challenging. In this study, we establish a fundamental relationship between light-matter coupling and the quantum geometry of magnon states. We propose the use of two-magnon Raman circular dichroism as an optical probe of magnon topology in honeycomb magnets, including the Chern number and topological gap. Our findings open up possibilities for integrating light and topological magnons in functional quantum devices.
PHYSICAL REVIEW LETTERS
(2023)
Article
Multidisciplinary Sciences
Thuc T. Mai, Kevin F. Garrity, Amber McCreary, Joshua Argo, Jeffrey R. Simpson, Vicky Doan-Nguyen, Rolando Valdes Aguilar, Angela R. Hight Walker
Summary: Magnetic excitations in van der Waals materials, particularly in the 2D limit, have been studied using temperature-dependent magnetoRaman spectroscopy. The researchers identified hybridization of two-magnon excitations with two phonons in manganese phosphorus triselenide, and constructed a model to explain the observations. This work demonstrates the strong hybridization between phonons and a two-magnon continuum, providing insight into interactions in 2D magnetic materials.
Article
Chemistry, Physical
Muyun Li, Yan Zhou, Kai Zhang, Guangyong Xu, Genda Gu, Fuhai Su, Xiaojia Chen
Summary: This study reveals the evolution of the coupling between electrons and phonons in FeTe0.5Se0.5 under pressure through ultrafast photocarrier dynamics and Raman scattering studies.
Article
Physics, Applied
V. A. Shestakov, M. M. Korshunov, Yu N. Togushova, O. Dolgov
Summary: The study reveals that with the increase of nonmagnetic disorders, the unconventional s(+/-) state in iron-based superconductors may transform into the s(++) state, and specific signatures of this transition process exist.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
M. A. Prosnikov
Summary: The study presented the linear spin-wave theory of PbFeBO4 spin dynamics, showing that the observed magnetic excitations in Raman scattering experiments are optical magnon and two-magnon modes. The results suggest a negligible role of magnon-magnon interactions, with only a small deviation in the two-magnon band from the one-magnon density of states.
Article
Materials Science, Multidisciplinary
Bin Wei, Jia-Ji Zhu, Yun Song, Kai Chang
Summary: We developed a self-consistent renormalized spin-wave theory for two-dimensional ferromagnetic MnBi2Te4 monolayer and studied the magnon spectrum, including magnon-magnon interactions at finite temperatures. Exchange anisotropy and single-ion anisotropy were found to be important in describing the monolayer MnBi2Te4. A significant renormalization of the magnon spectrum was discovered to be momentum dependent, especially near high-symmetry points, as the temperature approaches the Curie temperature. A notable increase in both the Curie temperature and magnetic anisotropy was observed under magnetic fields, with energy gaps increasing significantly as magnetic fields increased. Our results align well with recent experiments, providing deeper insights into the magnetic properties of two-dimensional magnets.
Article
Materials Science, Multidisciplinary
Sayandip Ghosh, Guido Menichetti, Mikhail I. Katsnelson, Marco Polini
Summary: Two-dimensional honeycomb ferromagnets provide opportunities to study interactions that are not observed in standard bulk ferromagnets. They have an optical spin-wave branch and a plasmonic mode, and when these two branches meet, interactions between charge and spin sectors can occur.
Article
Multidisciplinary Sciences
Jun Cui, Emil Vinas Bostroem, Mykhaylo Ozerov, Fangliang Wu, Qianni Jiang, Jiun-Haw Chu, Changcun Li, Fucai Liu, Xiaodong Xu, Angel Rubio, Qi Zhang
Summary: The research team observed magnon-induced chiral phonons and chirality selective magnon-phonon hybridization in the antiferromagnet FePSe3, which provides new insights for the development of angular momentum-based hybrid phononic and magnonic devices.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Amit Pawbake, Thomas Pelini, Alex Delhomme, Davide Romanin, Diana Vaclavkova, Gerard Martinez, Matteo Calandra, Marie-Aude Measson, Martin Veis, Marek Potemski, Milan Orlita, Clement Faugeras
Summary: Magnetic layered materials have shown potential in introducing magnetism in two-dimensional structures. This study successfully manipulated the magnon-phonon resonance by applying high hydrostatic pressures and high magnetic fields, leading to the formation of magnon-polarons.
Article
Multidisciplinary Sciences
Soumyadeep Ghosh, Haranath Ghosh
Summary: This work provides a detailed theoretical calculation of Fe/As K-edge X-ray absorption spectra for six different iron-based superconducting compounds. The study reveals that the core-hole effect has a significant impact on the Fe K-edge absorption spectrum in iron chalcogenides, while its influence on the As K-edge absorption spectrum is relatively small.
ADVANCED THEORY AND SIMULATIONS
(2022)
Article
Materials Science, Multidisciplinary
Kira Deltenre, Davide Bossini, Frithjof B. Anders, Gotz S. Uhrig
Summary: The light-induced femtosecond dynamics of the sublattice magnetizations in the antiferromagnetically ordered phase of the semiconductor alpha-MnTe is investigated theoretically as a function of an external driving field. The coherent longitudinal oscillations of the antiferromagnetic order parameter determined by the external driving frequency decay due to dephasing, and relaxation back to thermal equilibrium occurs through a dissipative term. Analytic solutions are provided to understand the effect of the driving light pulse on the coherent spin dynamics.
Article
Materials Science, Multidisciplinary
Tommaso Gorni, Diego Florez-Ablan, Luca de'Medici
Summary: In this study, we calculate the electronic properties of the normal state of uncollapsed LaFe2As2, considering local dynamical correlations. Our results show that LaFe2As2 has a reduced bare bandwidth, which explains the substantial correlations despite its nominal valence d6.5.
Article
Physics, Multidisciplinary
Thi Huyen Nguyen, Jaeseok Son, Soyeun Kim, Hwanbeom Cho, Choong H. Kim, Y. P. Wang, Kenneth S. Burch, In-Sang Yang, Jaehong Jeong, Je-Geun Park, S. J. Moon, T. W. Noh
Summary: Topological magnonic materials have potential for dissipationless spintronic applications, with pyrochlore iridates considered good candidates for designing topological magnon bands. Through Raman spectroscopy on Y2Ir2O7, it was confirmed that the material hosts a distinct nontrivial magnon band topology, demonstrating the potential for tailored magnon band topology in pyrochlore iridates.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Qianni Jiang, Yue Shi, Morten H. Christensen, Joshua J. Sanchez, Bevin Huang, Zhong Lin, Zhaoyu Liu, Paul Malinowski, Xiaodong Xu, Rafael M. Fernandes, Jiun-Haw Chu
Summary: In this study, the authors investigate the nematic susceptibility and its relationship with spin fluctuations in Fe1+yTe1-xSex using elastoresistivity measurement. They find that the nematic fluctuations in two symmetry channels are closely linked to the corresponding spin fluctuations, and observe an unusual temperature dependence of the nematic susceptibility attributed to the loss of coherence of the d(xy) orbital. The research highlights the importance of orbital differentiation on the nematic properties of iron-based materials.
COMMUNICATIONS PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Mehdi Hesani, Kourosh Rahimi, Ahmad Yazdani
Summary: The study investigated the relationship between charge doping and correlations in BaFe2As2 using DFT+DMFT, showing that electronic correlations strengthen systematically from electron-doping to hole-doping regimes. Due to its multi-orbital nature, correlations in BaFe2As2 are orbital-dependent, with the Fe-3d(xy) orbital exhibiting the most correlation.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Quantum Science & Technology
Mekena Metcalf, Emma Stone, Katherine Klymko, Alexander F. Kemper, Mohan Sarovar, Wibe A. de Jong
Summary: This article presents a digital quantum algorithm that simulates interaction with an environment using a small number of ancilla qubits, allowing the generation of thermal states. The algorithm has a wide range of applications, including the simulation of thermal state preparation in many-body systems and sampling Gibbs distributions.
QUANTUM SCIENCE AND TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
S. Wandel, F. Boschini, E. H. da Silva Neto, L. Shen, M. X. Na, S. Zohar, Y. Wang, S. B. Welch, M. H. Seaberg, J. D. Koralek, G. L. Dakovski, W. Hettel, M-F Lin, S. P. Moeller, W. F. Schlotter, A. H. Reid, M. P. Minitti, T. Boyle, F. He, R. Sutarto, R. Liang, D. Bonn, W. Hardy, R. A. Kaindl, D. G. Hawthorn, J-S Lee, A. F. Kemper, A. Damascelli, C. Giannetti, J. J. Turner, G. Coslovich
Summary: In this study, the transient evolution of charge density wave (CDW) correlations in cuprate superconductors after the quench of superconductivity was tracked using ultrafast resonant soft x-ray scattering. The results showed a nonthermal response of CDW order characterized by a doubling of the correlation length within approximately 1 picosecond of the superconducting quench. These findings suggest that the interaction between superconductivity and CDWs manifests inhomogeneously through disruption of spatial coherence.
Article
Chemistry, Physical
Seth Iwan, Chia-Min Lin, Christopher Perreault, Kallol Chakrabarty, Cheng-Chien Chen, Yogesh Vohra, Rostislav Hrubiak, Guoyin Shen, Nenad Velisavljevic
Summary: High-entropy transition metal borides offer novel opportunities for designing materials with crystalline phase stability, high strength, and thermal oxidation resistance under extreme conditions. The comprehensive theoretical and experimental investigation of prototypical high-entropy boride materials showed excellent performance in terms of compressive strength and phase stability, making them suitable for structural applications in nuclear and aerospace fields.
Article
Chemistry, Physical
Kaleb Burrage, Chia-Min Lin, Cheng-Chien Chen, Yogesh K. Vohra
Summary: The compression behavior and deformation behavior of Hafnium Diboride (HfB2) were studied through experimental and theoretical methods. The measurements of compression curve and compressive yield strength were obtained using X-ray diffraction. The results suggest that HfB2 has the potential to be used as a high strength material in extreme environments.
Article
Multidisciplinary Sciences
Akhil Francis, Ephrata Zelleke, Ziyue Zhang, Alexander F. Kemper, James K. Freericks
Summary: In this work, a local adiabatic ramp for state preparation is used to directly compute ground-state phase diagrams of the XY model on a quantum computer. Accurate phase diagrams were calculated for both two- and three-site systems using IBM quantum machines.
Article
Physics, Multidisciplinary
Efekan Koekcue, Thomas Steckmann, Yan Wang, J. K. Freericks, Eugene F. Dumitrescu, Alexander F. Kemper
Summary: This study presents a constructive algorithm based on Cartan decomposition for generating quantum circuits with time-independent depth. By applying this algorithm to specific models, it significantly improves simulation precision compared to traditional product formulas and provides in-depth analysis and numerical insight into optimal Hamiltonian simulations.
PHYSICAL REVIEW LETTERS
(2022)
Article
Mathematics, Applied
Daan Camps, Efekan Kokcou, Lindsay Bassman, Wibe A. De Jong, Alexander E. Kemper, Roel Van Beeumen
Summary: Quantum computing is a promising technology, but current NISQ computers are limited in terms of chip size and error rates. Shallow quantum circuits with simple topologies are important for successful applications in the NISQ era. Using matrix analysis, we have developed a circuit compression algorithm that efficiently compresses quantum circuits and simulates spin Hamiltonians. The algorithm is stable and can handle circuits with more than O(10(3)) spins.
SIAM JOURNAL ON MATRIX ANALYSIS AND APPLICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Wei-Chih Chen, Yogesh K. Vohra, Cheng-Chien Chen
Summary: This study utilizes an iterative machine learning procedure to search for new superhard B-N-O compounds. The results suggest that Bx+2NxO3 compounds with specific compositions could be potentially superhard and thermodynamically stable, as they also exhibit a wide bandgap.
Article
Materials Science, Multidisciplinary
Ekaterina M. Paerschke, Wei-Chih Chen, Rajyavardhan Ray, Cheng-Chien Chen
Summary: Motivated by the potential to control properties through strain, this study investigates the strain dependence of structure, electronic, and magnetic properties of Sr2IrO4. The findings show that strain affects both Ir-Ir distance and Ir-O-Ir angle, with the rigid octahedra picture being irrelevant. The study also reveals fundamentally different behavior for compressive and tensile strain, including the formation of subsets of bond- and orbital-dependent carriers under compression.
NPJ QUANTUM MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Qian Xiao, Wenliang Zhang, Teguh Citra Asmara, Dong Li, Qizhi Li, Shilong Zhang, Yi Tseng, Xiaoli Dong, Yao Wang, Cheng-Chien Chen, Thorsten Schmitt, Yingying Peng
Summary: The research found that the superconducting critical temperature of intercalated iron-selenide superconductor can be increased by insertion, which provides a bulk counterpart to investigate enhanced superconductivity. Using resonant inelastic x-ray scattering, the researchers observed several Raman-like excitations and assigned them to specific orbital excitations. The results also highlight the importance of the orbital degree of freedom in high-Tc iron selenides.
NPJ QUANTUM MATERIALS
(2022)
Article
Multidisciplinary Sciences
Woo Jin Kim, Michelle A. Smeaton, Chunjing Jia, Berit H. Goodge, Byeong-Gwan Cho, Kyuho Lee, Motoki Osada, Daniel Jost, Anton V. Ievlev, Brian Moritz, Lena F. Kourkoutis, Thomas P. Devereaux, Harold Y. Hwang
Summary: The article investigates the manifestation of the Jahn-Teller effect in square-planar anion coordination, and finds a distorted infinite-layer structure in CaCoO2 thin films. This distortion is attributed to the Jahn-Teller degeneracy of the d(xz) and d(yz) orbitals along with ligand-transition metal mixing.
Article
Multidisciplinary Sciences
Yekai Song, Chunjing Jia, Hongyu Xiong, Binbin Wang, Zhicheng Jiang, Kui Huang, Jinwoong Hwang, Zhuojun Li, Choongyu Hwang, Zhongkai Liu, Dawei Shen, Jonathan A. Sobota, Patrick Kirchmann, Jiamin Xue, Thomas P. Devereaux, Sung-Kwan Mo, Zhi-Xun Shen, Shujie Tang
Summary: The authors report electronic properties of monolayer ZrTe2 from ARPES and STM measurements that are consistent with the preformed exciton gas phase, a precursor for the excitonic insulator.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Bria Storr, Carolina Amezaga, Luke Moore, Seth Iwan, Yogesh K. Vohra, Cheng-Chien Chen, Shane A. Catledge
Summary: Metal oxide thermal reduction using microwave-induced plasma was employed to synthesize high entropy borides (HEBs). The ability of the microwave plasma to efficiently transfer thermal energy in an argon-rich plasma facilitated the chemical reactions. The predominantly single-phase hexagonal AlB2-type HEBs were obtained by boro/carbothermal reduction and borothermal reduction. A comparison of microstructural, mechanical, and oxidation resistance properties revealed that HEBs synthesized with carbon exhibited reduced porosity, higher density, and higher hardness.
Article
Materials Science, Multidisciplinary
J. Qu, X. Han, S. Sakamoto, C. J. Jia, J. Liu, H. Li, D. Guan, Y. -J. Zeng, M. Schuler, P. S. Kirchmann, B. Moritz, Z. Hussain, T. P. Devereaux, Z. -X Shen, J. A. Sobota
Summary: Spin-orbit coupling is the foundation for quantum materials with non-trivial topology and potential spintronics applications. The Rashba interaction is a representative model of spin-orbit interactions, and BiTeX (X = Cl, Br, I) semiconductors have been identified as exemplary Rashba materials. However, a detailed investigation of their spin textures and their relationship to local crystal symmetry is currently lacking. In this study, we directly image the spin texture of surface states of BiTeCl and find deviations from ideal behavior, including spin-polarization reversal near the Fermi level. These effects are described by higher-order contributions to the canonical Rashba model.
NPJ QUANTUM MATERIALS
(2023)
Article
Optics
Efekan Kokcu, Daan Camps, Lindsay Bassman, J. K. Freericks, Wibe A. de Jong, Roel Van Beeumen, Alexander F. Kemper
Summary: Unitary evolution is essential for quantum hardware simulation. This article presents an algorithm that compresses Trotter steps into a single block using algebraic relations, leading to fixed-depth time evolution for certain types of Hamiltonians.