Article
Physics, Multidisciplinary
Edwin Herrera, Victor Barrena, Isabel Guillamon, Jose Augusto Galvis, William J. Herrera, Jose Castilla, Dai Aoki, Jacques Flouquet, Hermann Suderow
Summary: The researchers used scanning tunnelling microscopy to reveal a 1D charge density wave in URu2Si2, demonstrating a potential connection with the hidden order state and indicating that charge interactions are among the most relevant features competing with hidden order in URu2Si2.
COMMUNICATIONS PHYSICS
(2021)
Letter
Materials Science, Multidisciplinary
Xingyu Ji, Yun Zhang, Xiaoying Wang, Yi Liu
Summary: The study demonstrates power-law behavior in the electrical resistivity, magnetic susceptibility, and specific heat of high-quality URu2Si2 single crystals in the hidden-order region, consistent with the Griffiths model. The Griffiths phase is characterized by residual short-range correlations on the collapse of the long-range large-moment antiferromagnetic phase, with evidence of cluster-like spins.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Multidisciplinary Sciences
Emmanouil Frantzeskakis, Ji Dai, Cedric Bareille, Tobias C. Roedel, Monika Guettler, Sheng Ran, Noravee Kanchanavatee, Kevin Huang, Naveen Pouse, Christian T. Wolowiec, Emile D. L. Rienks, Pascal Lejay, Franck Fortuna, M. Brian Maple, Andres F. Santander-Syro
Summary: Spontaneous symmetry breaking leads to phase transitions characterized by an order parameter, with phase transitions involving unknown order parameters being rare but intriguing. The transition of the heavy fermion compound URu2Si2 into the hidden-order phase is still unsolved, with research showing the interaction between heavy fermions and conduction band states near the Fermi level playing a crucial role. Analysis using angle-resolved photoemission spectroscopy reveals that the nonrigid change in the electronic structure between the hidden-order and antiferromagnetic phases suggests a change in the interaction strength between states near the Fermi level is crucial for the phase transition.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Multidisciplinary Sciences
Christian T. Wolowiec, Noravee Kanchanavatee, Kevin Huang, Sheng Ran, Alexander J. Breindel, Naveen Pouse, Kalyan Sasmal, Ryan E. Baumbach, Greta Chappell, Peter S. Riseborough, M. Brian Maple
Summary: Electrical resistivity measurements were performed on single crystals of URu2-xOsxSi(2) up to x = 0.28 under hydrostatic pressure up to 2 GPa, revealing that increasing Os concentration leads to lattice expansion, enhanced hidden-order (HO) phase, and a shift towards a large-moment antiferromagnetic (LMAFM) phase. Pressure, Fe substitution, and Os substitution are the only known perturbations that enhance the HO phase and induce the first-order transition to the LMAFM phase in URu2Si2.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Physics, Multidisciplinary
Xingyu Wang, Dongliang Gong, Bo Liu, Xiaoyan Ma, Jinyu Zhao, Pengyu Wang, Yutao Sheng, Jing Guo, Liling Sun, Wen Zhang, Xinchun Lai, Shiyong Tan, Yi-feng Yang, Shiliang Li
Summary: The resistivity of URu2-xFexSi2 samples is influenced by uniaxial pressure, revealing qualitative differences between the hidden order and large-moment antiferromagnetic phases.
CHINESE PHYSICS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
M. C. Rahn, A. Gallagher, F. Orlandi, D. D. Khalyavin, C. Hoffmann, P. Manuel, R. Baumbach, M. Janoschek
Summary: The hidden order phase in URu2Si2 is highly sensitive to electronic doping, and the substitution of silicon with phosphorus can isolate the effects of tuning the chemical potential to some extent. This substitution induces a new antiferromagnetic phase with localized magnetic moments, and enhanced exchange interactions due to chemical pressure lead to magnetic order. Comparison with other tuning studies of URu2Si2 helps delineate the mechanisms by which silicon-to-phosphorus substitution affects the system.
Article
Materials Science, Multidisciplinary
Wen Zhang, Wei Feng, Xuebing Luo, Shiyong Tan, Donghua Xie, Yi Liu, Yun Zhang, Qunqing Hao, Qiang Zhang, Xiegang Zhu, Qin Liu, Qiuyun Chen, Xinchun Lai
Summary: Despite extensive research, the nature of the hidden order phase transition in the heavy fermion superconductor URu2Si2 remains ambiguous. This study used scanning tunneling microscopy/spectroscopy to investigate different terminations of the parent URu2Si2 and Fe-doped samples. It was found that the small gap previously attributed to the hidden order parameter appeared in both the hidden order and large moment antiferromagnetic phases on the U terminations, indicating it is not unique to the hidden order parameter. Additionally, a peak-gap-peak structure was observed on the Si terminations. The changes in spectral features with Fe concentration and temperature suggest alterations in f-c hybridization. The higher vanishing temperatures and larger sizes of the gap in the Fe-substituted samples indicate stronger f-c hybridization compared to URu2Si2. These findings demonstrate that hybridization is not the driving force for the hidden order phase transition.
Article
Chemistry, Physical
Anis Biswas, Tyler Del Rose, Yaroslav Mudryk, P. O. Ribeiro, B. P. Alho, V. S. R. de Sousa, E. P. Nobrega, P. J. von Ranke, Vitalij K. Pecharsky
Summary: In this study, a large magnetocaloric effect was reported in a series of rare earth intermetallic compounds GdNi1-xCox, with tunability between 70 and 115 K. The materials exhibit unconventional second-order phase transitions and a model based on mean field theory was formulated to describe the magnetic and magnetocaloric properties in qualitative agreement with experimental results.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Neurosciences
Harrison Ritz, Conor J. Wild, Ingrid S. Johnsrude
Summary: This study used functional magnetic resonance imaging to assess the processing of spoken sentences under distraction, and found that more cognitive effort is required when dealing with degraded speech. Moreover, the study showed that attention-related regions are affected when speech quality declines during processing of clear speech.
JOURNAL OF NEUROSCIENCE
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
M. Muge Karaman, Lei Tang, Ziyu Li, Yu Sun, Jia-Zheng Li, Xiaohong Joe Zhou
Summary: The study demonstrates that the fractional order calculus diffusion model can effectively differentiate between different types of gastric adenocarcinoma lesions, providing a new promising approach for non-invasive assessment.
EUROPEAN RADIOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Tao Qin, Lingyun Zhou, Shuai Chen, Zhengxiang Chen
Summary: This paper proposes a magnetic anomaly recognition method based on fourth-order aperiodic stochastic resonance, which can effectively detect and identify weak magnetic anomaly signals generated by targets in the background of strong interference noise.
IEEE SENSORS JOURNAL
(2022)
Article
Mathematics, Interdisciplinary Applications
Mariam Sultana, Uroosa Arshad, Muhammad Khalid, Ali Akgul, Wedad Albalawi, Heba Y. Zahran
Summary: This research presents a new iterative predictor-corrector algorithm for solving fractional nuclear magnetic resonance flow equations. The algorithm shows higher accuracy and requires less computational time compared to previous numerical methods. It has a great potential for application in other chaotic systems of fractional differential equations.
FRACTAL AND FRACTIONAL
(2022)
Article
Physics, Particles & Fields
Xin Jin, Yuheng Wu, Xuejie Liu, Hongxia Huang, Jialun Ping, Bin Zhong
Summary: No bound state was found in the investigation of strange hidden-charm tetraquark systems, but two potential resonance states were identified. The coupling calculation is essential to provide the necessary information for experiments to search for exotic hadron states.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Physics, Multidisciplinary
Dominic J. Skinner, Boya Song, Hannah Jeckel, Eric Jelli, Knut Drescher, Joern Dunkel
Summary: Recent advances in microscopy techniques allow for studying complex biophysical systems at single-cell resolution, distinguishing structurally different cellular materials through a topological earth mover's (TEM) distance, and revealing a topological optimal transport problem in fruit fly wing development.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Yuanjian Zheng, Anshul D. S. Parmar, Massimo Pica Ciamarra
Summary: The study demonstrates the existence of hidden order beyond hyperuniformity in complex disordered systems, which is manifested through higher moments of the probability distribution of local density and extends to longer length scales at a faster divergence rate near the critical point.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Condensed Matter
Zihao Shen, X. D. Zhu, Rahim R. Ullah, Peter Klavins, Valentin Taufour
Summary: In this study, we present the results of bulk magnetization measurements and spatially resolved measurements of magnetic domains in Co3Sn2S2.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Physics, Multidisciplinary
M. Zhu, D. J. Voneshen, S. Raymond, O. J. Lipscombe, C. C. Tam, S. M. Hayden
Summary: In this study, we demonstrate through inelastic neutron scattering that there are low-energy collective spin fluctuations near the superconducting critical temperature and near the doping p* in cuprate superconductors. These spin fluctuations are attributed to the collapse of the pseudogap combined with an underlying tendency to magnetic order. They exist across the superconducting phase diagram and may be related to the strange metal behavior observed in overdoped cuprates.
Article
Materials Science, Multidisciplinary
Kazuaki Iwasa, Kazuya Suyama, Seiko Ohira-Kawamura, Kenji Nakajima, Stephane Raymond, Paul Steffens, Akira Yamada, Tatsuma D. Matsuda, Yuji Aoki, Ikuto Kawasaki, Shin-ichi Fujimori, Hiroshi Yamagami, Makoto Yokoyama
Summary: This study investigates the spin dynamics, crystalline-electric-field (CEF) level scheme, specific heat, and x-ray photoemission spectra (XPS) of Ce3Rh4Sn13, a material that exhibits anomalous semimetal transport in the chiral crystallographic phase. The observed CEF excitations of approximately 7 and 39 meV align with the two different Ce-ion sites in the chiral structure. The hybridized Ce 4f electrons contribute to the semimetal carriers due to broader CEF excitations and a strong 4f(1) peak at the Fermi level. Additionally, the spin fluctuation associated with the Kramers doublet ground state is characterized by a peak at 0.15 meV, and the electronic state involving this spin fluctuation causes the T-3 behavior of specific heat below 0.6 K, attributed to linear dispersion relations of electrons in the Weyl-Kondo semimetal in the chiral-lattice symmetry.
PHYSICAL REVIEW MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Ashlee K. Hauble, Kamil Ciesielski, Valentin Taufour, Eric S. Toberer, Susan M. Kauzlarich
Summary: In this study, Ba2-xEuxZnSb2 was synthesized by substituting Eu for Ba to improve the stability of the material in air and to characterize its thermal and electronic properties. The samples exhibited low thermal conductivity (<0.8 W/m K), high Seebeck coefficient (350-550 mu V/K), and high charge carrier mobility (20-35 cm2/V) from 300 to 500 K, consistent with predictions of high thermoelectric efficiency. Evaluation of the thermoelectric quality factor suggests that a higher zT can be achieved by increasing the carrier concentration through doping.
INORGANIC CHEMISTRY
(2023)
Article
Physics, Multidisciplinary
Arvind Maurya, Hisatomo Harima, Fuminori Honda, Yusei Shimizu, Yoshiki J. Sato, Ai Nakamura, Dexin Li, Yoshiya Homma, Dai Aoki
Summary: In this study, we observed bulk superconductivity in LaNiZn below Tc = 1.5 K, as confirmed by its electrical transport and specific heat capacity (Delta Cel/gamma Tc = 1.41). The upper critical fields along the hexagonal crystallographic c-axis and in the basal plane at 30 mK were found to be 0.36 and 0.24 T, respectively, suggesting mainly an orbital mechanism for field-induced depairing and a negligible spin triplet component in the superconducting order parameter. The angular dependence of Hc2 is explained by an effective mass model with an oblate-shaped effective Fermi surface. Our experimental and band calculation under local density approximation results suggested that LaNiZn is a Bardeen- Cooper-Schrieffer s-wave-type superconductor in the dirty limit, possibly involving multiple bands.
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
(2023)
Article
Physics, Multidisciplinary
Shiki Ogata, Shunsaku Kitagawa, Katsuki Kinjo, Kenji Ishida, Manuel Brando, Elena Hassinger, Christoph Geibel, Seunghyun Khim
Summary: CeRh2As2 is the first example of multiple superconducting phases due to the sublattice degrees of freedom. In this study, the spin susceptibility of CeRh2As2 at two crystallographically inequivalent As sites was measured using nuclear magnetic resonance. The results strongly indicate that both superconducting phases are spin-singlet states, and there is no sign of magnetic ordering in the high-field superconducting phase.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Multidisciplinary
A. Rosuel, C. Marcenat, G. Knebel, T. Klein, A. Pourret, N. Marquardt, Q. Niu, S. Rousseau, A. Demuer, G. Seyfarth, G. Lapertot, D. Aoki, D. Braithwaite, J. Flouquet, J. P. Brison
Summary: The recently discovered superconductor UTe2, with a superconducting transition temperature Tc between 1.5 and 2 K, has raised great attention due to its strong suspicion of spin-triplet and topological superconductivity. The properties of UTe2 under a magnetic field are also remarkable, showing field-reinforced and field-induced superconducting phases. This study provides the first complete thermodynamic determination of the phase diagram for fields applied along different crystallographic directions, revealing a strong negative curvature of the upper critical field along the easy axis and the existence of a phase transition line within the superconducting phase.
Article
Physics, Applied
Joshua F. Belot, Valentin Taufour, Stefano Sanvito, Gus L. W. Hart
Summary: Researchers developed machine-learning models based on the chemical composition of materials to predict Curie temperatures. A random-forest model provided the most accurate predictions and did not require dimensionality reduction or complex descriptors. Cobalt-rich and iron-rich materials showed the highest Curie temperatures among binary and ternary compounds.
APPLIED PHYSICS LETTERS
(2023)
Article
Nanoscience & Nanotechnology
N. Biniskos, F. J. dos Santos, M. dos Santos Dias, S. Raymond, K. Schmalzl, P. Steffens, J. Persson, N. Marzari, S. Bluegel, S. Lounis, T. Brueckel
Summary: In this study, we investigate the spin-excitation spectrum of bulk Mn5Si3 using inelastic neutron scattering measurements and density functional theory calculations. We find that the spin dynamics of each phase in Mn5Si3 is robust against any combination of temperature and magnetic field. The high-energy spin dynamics exhibit distinctive characteristics of either spin waves or broad fluctuation patterns in different phases.
Article
Materials Science, Multidisciplinary
R. R. Ullah, P. Klavins, X. D. Zhu, V. Taufour
Summary: Two ferromagnetic phases, FM1 and FM2, were found to exist in LaCrGe3, and the domain structure undergoes a substantial change between these two phases. The measurements of the coercive field and magnetization curves reveal unconventional magnetic domain behavior in the FM1 phase, followed by a depinning region as the system transitions into the FM2 phase.
Article
Materials Science, Multidisciplinary
Arvind Maurya, Atsushi Miyake, Hisashi Kotegawa, Yusei Shimizu, Yoshiki J. Sato, Ai Nakamura, Dexin Li, Yoshiya Homma, Fuminori Honda, Masashi Tokunaga, Dai Aoki
Summary: We report the single-crystal growth of UNi4P2 and demonstrate its Ising-type ferromagnetism with a Curie temperature of 25 K through magnetization, electrical transport, and specific heat measurements. The strong anisotropy between the c axis and the tetragonal basal plane is maintained up to 57 T, while the intraplane anisotropy gradually disappears at higher fields. Our findings suggest that anisotropic electron correlations may stabilize Ising-type ferromagnetic order in one dimension at nonzero temperatures, potentially with its own characteristic universality class.
Article
Chemistry, Physical
Luke M. McClintock, Long Yuan, Ziyi Song, Michael T. Pettes, Dmitry Yarotski, Rijan Karkee, David A. Strubbe, Liang Z. Tan, Azza Ben-Akacha, Biwu Ma, Yunshu Shi, Valentin Taufour, Dong Yu
Summary: 1D organic metal halide hybrids (OMHHs) exhibit promising optical properties for photodetection and lighting applications, but the governing mechanisms and surface effects are not well understood. This study investigates the optical properties of 1D C4N2H14PbBr4 through polarization-dependent time-averaged and time-resolved photoluminescence spectroscopy. The results reveal an excitation-energy-dependent anisotropic emission, which is attributed to fast surface recombination confirmed by first-principles calculations and experimental measurements.
Article
Materials Science, Multidisciplinary
K. Kinjo, H. Fujibayashi, S. Kitagawa, K. Ishida, Y. Tokunaga, H. Sakai, S. Kambe, A. Nakamura, Y. Shimizu, Y. Homma, D. X. Li, F. Honda, D. Aoki, K. Hiraki, M. Kimata, T. Sasaki
Summary: UTe2 is a recently discovered spin-triplet superconductor with a magnetic field (H)-boosted superconductivity >16 T when H is applied exactly parallel to the b axis. The high-H superconducting (HHSC) phase of UTe2 has not been thoroughly investigated, and its SC properties as well as the spin state are not well understood. In this study, AC magnetic susceptibility and nuclear magnetic resonance measurements were performed, revealing that the HHSC state has bulk nature and is sensitive to the H angle, with different SC character compared to the low-H superconducting (LHSC) state. The dominant spin component of the spin-triplet pair also changes from the LHSC state (along the a axis) to the HHSC state (along the b axis). Our findings suggest that the H-induced multiple SC states originate from the remaining spin degrees of freedom.
Article
Materials Science, Multidisciplinary
V. Baledent, A. Vaunat, S. Petit, L. Nataf, S. Chattopadhyay, S. Raymond, P. Foury-Leylekian
Summary: This paper investigates the physical properties of the type-II multiferroic GdMn2O5 material using neutron scattering, electric polarization, and magnetization measurements. A complex (T,H) phase diagram is observed, with a field-induced magnetic transition occurring at around 11 T at low temperature. In the high-field phase, an additional electric polarization along both the a and b directions is observed, which is allowed by symmetry but has never been experimentally observed before. While the magnetic properties return to their initial states after the field is driven back to zero, the polarization along the a direction shows a significant increase. This behavior, observed for all directions of the magnetic field, represents a novel and striking manifestation of magnetoelectric coupling, resulting in the establishment of a new ground state at zero magnetic field.
Article
Materials Science, Multidisciplinary
Benoit Fauque, Philippe Bourges, Alaska Subedi, Kamran Behnia, Benoit Baptiste, Bertrand Roessli, Tom Fennell, Stephane Raymond, Paul Steffens
Summary: Spatial correlations between atoms induce depletion in the energy dispersion of phonons, leading to significant softening of the transverse acoustic mode in SrTiO3. This softening occurs at a small wave vector, with spatial correlations extending over a distance of 40 lattice parameters. It is attributed to the formation of mesoscopic fluctuating domains due to the coupling between local strain and ferroelectric fluctuations.
