Article
Physics, Applied
A. Sherman
Summary: This paper investigates the correlation between negative electron compressibility (NEC) regions and the observed phase separation in crystals with strong electron correlations. The NEC regions are found in several models describing strong electron correlations and lead to the separation of the system into electron-rich and electron-poor domains. Phonons play a role in absorbing the energy released during this separation and shaping lattice distortions and domains of different electron concentrations.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2022)
Article
Physics, Multidisciplinary
Houfei Yuan, Zhen Zhang, Walter Kob, Yujie Wang
Summary: Using computed x-ray tomography, the study reveals the three-dimensional structure of binary hard sphere mixtures, showcasing a surprisingly regular order on intermediate and large length scales. The symmetry of this structure is found to depend on the size ratio of the particles q, and an efficient packing of particles is associated with a locally maximally disordered structure.
PHYSICAL REVIEW LETTERS
(2021)
Article
Materials Science, Multidisciplinary
F. Museur, E. Lhotel, P. C. W. Holdsworth
Summary: The fragmentation description is used to analyze calculated neutron scattering intensities from kagome ice and spin ice systems, where different fragments contribute independently to the scattering intensity. This framework is employed to study the ordering behavior induced by quantum fluctuations in kagome ice and spin ice. By restricting quantum fluctuations to the transverse fragment, a double-q structure with different ordering wave vectors of longitudinal and transverse fragments is observed. The intensity reduction of transverse fragments' Bragg peaks can serve as a diagnostic tool for quantum fluctuations, which is consistent with quantum Monte Carlo data for spin ice in a [111] field.
Article
Materials Science, Multidisciplinary
M. S. Bahovadinov, D. Kurlov, S. Matveenko, B. L. Altshuler, G. Shlyapnikov
Summary: In this study, evidence of many-body localization (MBL) transition in a one-dimensional isotropic XY chain with next-nearest-neighbor frustration in a random magnetic field is presented. By performing finite-size exact diagonalization calculations and analyzing level-spacing statistics and fractal dimensions, the MBL transition with increasing random field amplitude is characterized. The presence of a delocalized phase is explained by the appearance of an effective nonlocal interaction between the fermions due to frustration provided by the next-nearest-neighbor hopping.
Article
Multidisciplinary Sciences
Mariam Kavai, Joel Friedman, Kyle Sherman, Mingda Gong, Ioannis Giannakis, Samad Hajinazar, Haoyu Hu, Sarah E. Grefe, Justin Leshen, Qiu Yang, Satoru Nakatsuji, Aleksey N. Kolmogorov, Qimiao Si, Michael Lawler, Pegor Aynajian
Summary: The research reveals an electronic phase separation in single crystalline Pr2Ir2O7, with well-defined Kondo resonances interweaved with a non-magnetic metallic phase with Kondo-destruction.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Yiqing Gu, Qisi Wang, Hongliang Wo, Zheng He, Helen C. Walker, Jitae T. Park, Mechthild Enderle, Andrew D. Christianson, Wenbin Wang, Jun Zhao
Summary: FeSe is a structurally simple high-temperature superconductor with an intriguing superconducting nematic paramagnetic phase and unusual spin excitation spectra. Neutron scattering measurements reveal highly frustrated nearest-neighbor and next-nearest-neighbor exchange couplings in FeSe, providing a natural explanation for its highly tunable superconductivity and nematicity.
Article
Materials Science, Multidisciplinary
Shuai Chen, Tian Wang, Xiaoyan Li, Yuan Cheng, Gang Zhang, Huajian Gao
Summary: The effects of elemental concentration, short-range ordering, and atomic segregation on the melting temperature of high-entropy alloys (HEAs) were studied. It was found that the melting temperature of HEAs increases with decreasing Cu concentration, and Cu atoms tend to break bonds more readily during heating. The reduced melting temperature is attributed to the formation of more short-range ordering and atomic segregation with increasing Cu concentration.
Article
Chemistry, Inorganic & Nuclear
Lei Wang, Ying Chen, Jun Ni, Feng Ye, Cong Wang
Summary: This study investigates the negative thermal expansion (NTE) property of CaTiF6 using a combination of quasi-harmonic approximation (QHA) and anharmonic interaction. The results show that low-frequency phonons, especially acoustic phonons, contribute significantly to the NTE behavior of CaTiF6. The improved self-consistent phonon approximation (ISCPA) improves the quantitative consistency of NTE behavior compared to QHA. Furthermore, the study explores the NTE mechanism through phonon lifetimes and predicts the lattice thermal conductivity (LTC).
INORGANIC CHEMISTRY
(2022)
Article
Physics, Nuclear
Michal Barej, Adam Bzdak
Summary: In this study, we calculate the baryon factorial cumulants assuming arbitrary short-range correlations and global baryon number conservation, and derive the general factorial cumulant generating function. We observe that the short-range correlations of more than n particles are suppressed with increasing number of particles.
Article
Chemistry, Multidisciplinary
Ahmed Al Harraq, Aubry A. Hymel, Emily Lin, Thomas M. Truskett, Bhuvnesh Bharti
Summary: Competition between attractive and repulsive interactions between colloidal particles drives the formation of complex assemblies. In this study, the dual functionality of magnetic nanoparticle dispersions is exploited to simultaneously drive attraction and repulsion between suspended non-magnetic microspheres, allowing for precise tuning of the interaction energy landscape of colloidal particles.
COMMUNICATIONS CHEMISTRY
(2022)
Article
Chemistry, Physical
Yili Cao, Haowei Zhou, Sergii Khmelevskyi, Kun Lin, Maxim Avdeev, Chin-Wei Wang, Bingjie Wang, Fengxia Hu, Kenichi Kato, Takanori Hattori, Jun Abe, Koji Ohara, Saori Kawaguchi, Qiang Li, Masayuki Fukuda, Takumi Nishikubo, Koomok Lee, Takehiro Koike, Qiumin Liu, Jun Miao, Jinxia Deng, Baogen Shen, Masaki Azuma, Xianran Xing
Summary: In this study, the effect of hydrostatic and chemical pressure on the crystal structure and magnetic properties of intermetallic compounds for permanent magnets was investigated. It was found that aluminum doping in Ho2Fe17 resulted in negative chemical pressure, which had a negative impact on the material's properties. By comparing the effects of chemical pressure and hydrostatic pressure, it was observed that pressure could be used to control the suppression and enhancement of negative thermal expansion (NTE) in the material.
CHEMISTRY OF MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Ruoshi Jiang, Zi-Jian Lang, Tom Berlijn, Wei Ku
Summary: Carrier density is a key factor in controlling material properties, especially in strongly correlated materials. In correlated semimetals, the carrier density can vary sensitively against weak external controls such as temperature, magnetic field, and pressure. Through simulation, it has been discovered that short-range correlation can reversely modulate the carrier density in semimetals, which opens up new possibilities for functionalizing these materials.
Article
Multidisciplinary Sciences
J. Khatua, T. Arh, Shashi B. Mishra, H. Luetkens, A. Zorko, B. Sana, M. S. Ramachandra Rao, B. R. K. Nanda, P. Khuntia
Summary: The frustrated magnet Ba2MnTeO6 exhibits strong antiferromagnetic interactions, novel electronic structure, and a three-dimensional magnetic ordering mechanism, which are characterized through muon spin relaxation, thermodynamic measurements, and theoretical studies.
SCIENTIFIC REPORTS
(2021)
Article
Physics, Multidisciplinary
K. T. K. Chung, J. S. K. Goh, A. Mukherjee, W. Jin, D. Lozano-Gomez, M. J. P. Gingras
Summary: This Letter demonstrates the use of polarized neutron scattering to isolate spin-spin correlations in a frustrated magnetic system with a classical spin liquid phase. The study shows that the non-spin-flip polarized neutron scattering is highly sensitive to correlations induced by weak perturbations in systems with flat bands. Experimental results from the dipolar spin ice compound Ho2Ti2O7 are used to support the findings.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Leonid Burakovsky, Dean L. Preston, Scott D. D. Ramsey, Charles E. E. Starrett, Roy S. S. Baty
Summary: Although copper and silver are polymorphic materials, they are reliable Hugoniot standards. This study presents an accurate analytic model of their principal Hugoniots, as well as those of iridium and platinum, over a wide range of pressures. The comparison with experimental and theoretical data demonstrates excellent agreement, making the new model a reliable standard for copper and silver.
MATTER AND RADIATION AT EXTREMES
(2023)
Article
Materials Science, Multidisciplinary
Francisco J. J. Rescalvo, Cristian Timbolmas, Rafael Bravo, Maria Portela, Jose Lorenzana
Summary: Digital Image Correlation (DIC) is a technique used to analyze the strain field distribution on the surface of solids. This study analyzes the nonlinear bonding interaction between poplar timber and Carbon Fiber Reinforced Polymers (CFRP) reinforcement under mixed mode I&II. The experiments show that the strain distributions consist of two lateral transfer zones where bonding mode II dominates and a central zone of constant strain where bonding mode I is dominant. The maximum load capacity increases with the bond length until it reaches the effective bond length.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Giulia Venditti, Maria Eleonora Temperini, Paolo Barone, Jose Lorenzana, Maria N. Gastiasoro
Summary: Motivated by the discovery of superconductivity in KTaO3-based heterostructures, this study proposes a pairing mechanism based on spin-orbit assisted coupling between conduction electrons and ferroelectric modes. Ab initio frozen-phonon computations show a linear-in-momentum Rashba-like coupling, with a strong angular dependence, in the lower j = 3/2 manifold, deviating from the conventional isotropic Rashba model. The anisotropy of the Rashba interaction is captured by a microscopic toy model for the t(2g) electrons, and additional symmetry allowed terms beyond odd-parity spin-conserving inter-orbital hopping processes are needed to describe the Rashba-like polar interaction.
JOURNAL OF PHYSICS-MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
D. Jezierski, K. Koteras, M. Domanski, P. Polczynski, Z. Mazej, J. Lorenzana, W. Grochala
Summary: High-temperature solid-state reaction between orthorhombic AgF2 and monoclinic CuF2 resulted in coexisting solid solutions with stoichiometry Ag1-xCuxF2. The mutual solubility in AgF2 and CuF2 deviates from Vegard's law. The magnetic properties and electrical conductivity of Ag1-xCuxF2 were influenced by the Cu content.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Physical
Edouard Lesne, Yildiz G. Saglam, Raffaele Battilomo, Maria Teresa Mercaldo, Thierry C. van Thiel, Ulderico Filippozzi, Canio Noce, Mario Cuoco, Gary A. Steele, Carmine Ortix, Andrea D. Caviglia
Summary: In this article, the discovery of Berry curvature (BC) in LaAlO3/SrTiO3 interfaces grown along the [111] direction is reported, which originates from both spin and orbital sources. The BC associated with the spin quantum number is detected through the measurements of an anomalous planar Hall effect. The presence of a nonlinear Hall effect with time-reversal symmetry indicates the existence of large orbital-mediated BC dipoles. The coexistence of different forms of BC allows for the integration of spintronic and optoelectronic functionalities in a single material.
Article
Materials Science, Multidisciplinary
Maria Teresa Mercaldo, Canio Noce, Andrea D. D. Caviglia, Mario Cuoco, Carmine Ortix
Summary: The Berry curvature (BC), which encodes the geometric properties of electronic wavefunctions, is essential for various Hall-like transport phenomena. This study shows that BC concentrations can arise even without hole excitations in materials with orbital degrees of freedom. The crystals fields in low-symmetric structures trigger BCs characterized by hot-spots and singular pinch points, leading to giant BC dipoles and large non-linear transport responses.
NPJ QUANTUM MATERIALS
(2023)
Article
Quantum Science & Technology
Maria Teresa Mercaldo, Carmine Ortix, Mario Cuoco
Summary: The pairing structure of superconducting materials is determined by the point group symmetries of the crystal. Materials with low crystalline symmetry can exhibit spin-singlet multiorbital superconductivity, which allows for even-parity Cooper pairs with high orbital moment. The lack of mirror and rotation symmetries enables pairing states with quintet orbital angular momentum symmetry. The study explores how an intrinsic orbital dependent phase can lead to anomalous Josephson couplings by using superconducting leads with nonequivalent breaking of crystalline symmetry.
ADVANCED QUANTUM TECHNOLOGIES
(2023)
Article
Chemistry, Multidisciplinary
Athby H. H. Al-Tawhid, Samuel J. J. Poage, Salva Salmani-Rezaie, Antonio Gonzalez, Shalinee Chikara, David A. A. Muller, DivineP. P. Kumah, Maria N. N. Gastiasoro, Josei Lorenzana, Kaveh Ahadi
Summary: In this study, epitaxial LaMnO3/KTaO3(111) heterostructures were grown to investigate the nature of superconductivity under in-plane magnetic fields. It was found that superconductivity remains robust in optimally doped heterostructures, with a critical field of approximately 25 T. The superconducting order parameter is highly sensitive to carrier density. The formation of anomalous quasiparticles with vanishing magnetic moment, driven by spin-orbit coupling, provides significant immunity against magnetic fields beyond the Pauli paramagnetic limit. These findings present opportunities for designing superconductors with extreme resilience against applied magnetic fields.
Article
Physics, Multidisciplinary
Maria N. Gastiasoro, Maria Eleonora Temperini, Paolo Barone, Jose Lorenzana
Summary: In this study, the linear coupling between conduction electrons and ferroelectric soft transverse modes in SrTiO3 is investigated using ab initio computations and a microscopic model. A strong Rashba-like coupling is found, which can be remarkably strong for certain polar eigenvector forms. The dome behavior in SrTiO3 is explained as a result of momentum-dependent quenching of angular momentum due to a competition between spin-orbit and hopping energies. These findings provide a compelling theoretical mechanism for understanding bulk superconductivity in doped SrTiO3.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Physics, Multidisciplinary
H. P. Ojeda Collado, Gonzalo Usaj, C. A. Balserio, Damian H. Zanette, Jose Lorenzana
Summary: We present a systematic study of the dynamical phase diagram of a periodically driven BCS system. Three different driving mechanisms are considered and compared. We identify the locus in parameter space of parametric resonances and four dynamical phases. By mapping the BCS problem to a collection of nonlinear and interacting classical oscillators, we shed light on the origin of time-crystal phases and parametric resonances.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Physics, Multidisciplinary
H. P. Ojeda Collado, Nicolo Defenu, Jose Lorenzana
Summary: We generalize the dynamical phase diagram of a Bardeen-Cooper-Schrieffer condensate, considering attractive to repulsive, i.e., critical quenches (CQs) and a nonconstant density of states (DOS). Different synchronized Higgs dynamical phases can be stabilized, associated with singularities in the DOS and different quench protocols. The relevance of these remarkable phenomena and their realization in ensembles of fermionic cold atoms confined in optical lattices is also discussed.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
I. Maccari, Bal K. Pokharel, J. Terzic, J. Jesudasan, Surajit Dutta, Pratap Raychaudhuri, J. Lorenzana, C. De Michele, C. Castellani, L. Benfatto, Dragana Popovic
Summary: In a two-dimensional superconducting vortex lattice, melting from solid to isotropic liquid occurs via an intermediate phase with orientational correlations. The impact of such correlations on transport and their interaction with quenched disorder are still unknown.
Article
Materials Science, Multidisciplinary
John M. Wilkinson, Stephen J. Blundell, Sebastian Biesenkamp, Markus Braden, Thomas C. Hansen, Kacper Koteras, Wojciech Grochala, Paolo Barone, Jose Lorenzana, Zoran Mazej, Gasper Tavcar
Summary: KAgF3 is a quasi-one-dimensional quantum antiferromagnet with interesting structural and magnetic transitions. At low temperatures, it orders as an A-type antiferromagnet with an ordered moment. Previous magnetometry study provides evidence for an intermediate phase at T-N1 < T < T-N2, but its nature remains unknown.
Article
Materials Science, Multidisciplinary
Philipp Eck, Carmine Ortix, Armando Consiglio, Jonas Erhardt, Maximilian Bauernfeind, Simon Moser, Ralph Claessen, Domenico Di Sante, Giorgio Sangiovanni
Summary: The recently introduced classification of two-dimensional insulators in terms of topological crystalline in-variants has been extended to quantum spin Hall insulators, and an experimental fingerprint of the obstruction has been measured.
Article
Materials Science, Multidisciplinary
Riccardo Piombo, Daniel Jezierski, Henrique Perin Martins, Tomasz Jaron, Maria N. Gastiasoro, Paolo Barone, Kamil Tokar, Przemyslaw Piekarz, Mariana Derzsi, Zoran Mazej, Miguel Abbate, Wojciech Grochala, Jose Lorenzana
Summary: AgF2 is proposed as a cuprate analog with strong correlation and marked covalence. Experimental and computational results indicate that AgF2 can be classified as a charge-transfer correlated insulator according to the Zaanen-Sawatzky-Allen classification scheme. This suggests that AgF2 may become a high-temperature superconductor if metallization is achieved by doping.
Article
Materials Science, Multidisciplinary
Maria N. Gastiasoro, Maria Eleonora Temperini, Paolo Barone, Jose Lorenzana
Summary: A linear coupling is obtained from a minimal microscopic model, changing the conventional understanding of superconductivity in SrTiO3. Different wave states and pairing instabilities are revealed, along with the need for an extra softening phenomenon to explain the zero resistance state.
