Tootfinder

Karl Popper clearly explained that a truly tolerant society must retain the right to be intolerant of the intolerant. He wrote: "We must therefore claim, in the name of tolerance, the right not to tolerate intolerance." #intolerance #freedomOfSpeech

DAFTED: Decoupled Asymmetric Fusion of Tabular and Echocardiographic Data for Cardiac Hypertension Diagnosis
J\'er\'emie Stym-Popper, Nathan Painchaud, Cl\'ement Rambour, Pierre-Yves Courand, Nicolas Thome, Olivier Bernard
https://arxiv.org/abs/2509.15990

DAFTED: Decoupled Asymmetric Fusion of Tabular and Echocardiographic Data for Cardiac Hypertension Diagnosis
Multimodal data fusion is a key approach for enhancing diagnosis in medical applications. We propose an asymmetric fusion strategy starting from a primary modality and integrating secondary modalities by disentangling shared and modality-specific information. Validated on a dataset of 239 patients with echocardiographic time series and tabular records, our model outperforms existing methods, achieving an AUC over 90%. This improvement marks a crucial benchmark for clinical use.

Popper hat’s klar gesagt: Toleranz darf nicht naiv sein. Eine Demokratie, die Hassreden als „Meinung“ schützt, untergräbt sich selbst. Ambivalenz ist keine Ausrede, wenn Sprache zur Waffe wird. Offene Gesellschaft heißt wehrhafte Gesellschaft. @… #Demokratie

A rutile-based homologous series Na(PtO$_2$)$_{2\it{n} 1}$ discovered by computationally assisted high-pressure synthesis
Yasuhito Kobayashi, Hidefumi Takahashi, Shunsuke Kitou, Akitoshi Nakano, Hajime Sagayama, Yuichi Yamasaki, Shintaro Ishiwata
https://arxiv.org/abs/2508.15223

A rutile-based homologous series Na(PtO$_2$)$_{2\it{n}+1}$ discovered by computationally assisted high-pressure synthesis
Layered transition metal oxides typified by the Ruddlesden-Popper phase have been extensively studied for its applications in high-temperature superconductivity, catalysis, and battery technologies. Despite the remarkable structural diversity and catalytic functionality of platinum oxides, the exploration of layered polymorphs has remained significantly constrained mainly due to the high inertness of platinum. Here, we discover a new homologous series of layered ternary oxides, Na(PtO$_2$)$_{2\…

You know, Karl Popper was no saint but if my theory is that “LLMs make errors and mistakes by omission and by addition” then you cannot falsify my theory by saying “but here’s an example of an error-free LLM” (yes, doesn’t exist, but let’s assume there is one).
That’s not how logic logics.

Role of correlations in Ruddlesden-Popper bilayer nickelates under compressive strain
Logan Bleys, Nicholas Corkill, Yi-Feng Zhao, Gheorghe Lucian Pascut, Harrison LaBollita, Antia S. Botana, Khandker F. Quader
https://arxiv.org/abs/2509.00940

Role of correlations in Ruddlesden-Popper bilayer nickelates under compressive strain
The recent discovery of superconductivity in thin films of the bilayer Ruddlesden-Popper (RP) nickelate La$_3$Ni$_2$O$_7$ (La327) under compressive strain has generated enormous interest, opening up further opportunities to stabilize superconductivity in this class of materials at ambient pressure. To better understand the many-body normal state from which superconductivity arises, it is important to ascertain the nature and role of correlations in its electronic structure. To provide insights …

Piezomagnetism-driven magnetoelectric coupling in altermagnetic multiferroic K3Cr2F7
Ying Zhou, Hui-Min Zhang, Cheng-Ao Ji, Hongjun Xiang, Shuai Dong, James M. Rondinelli, Xue-Zeng Lu
https://arxiv.org/abs/2508.13952

Piezomagnetism-driven magnetoelectric coupling in altermagnetic multiferroic K3Cr2F7
Ferroelectric control of altermagnetism in momentum space has been studied widely, while the control of magnetism in real space of altermagnets are still rare. We present a design rule to identify multiferroicity in n=2 Ruddlesden-Popper halides. Our results show that a Jahn-Teller distortion can cooperate with oxygen octahedral rotations to break inversion symmetry, which we demonstrate in K3Cr2F7 and cation-ordered KAg2Cu2Cl7, and leads to a ferrielectric-to-ferroelectric phase transition in …

Recent progress in nickelate superconductors
Yuxin Wang, Kun Jiang, Jianjun Ying, Tao Wu, Jinguang Cheng, Jiangping Hu, Xianhui Chen
https://arxiv.org/abs/2509.08386 https://

Recent progress in nickelate superconductors
The discovery of superconductivity in nickelate compounds has opened new avenues in the study of high-temperature superconductors. Here we provide a comprehensive overview of recent progress in the field, including all different nickelate systems, reduced-Ruddlesden-Popper-type infinite layer LaNiO$_2$, Ruddlesden-Popper-type bilayer La$_3$Ni$_2$O$_7$ and trilayer La$_4$Ni$_3$O$_{10}$. We begin by introducing the superconducting properties of the hole-doped LaNiO$_2$ system, which marked the st…

Bürgerliche Werte wie Respekt, Mäßigung, Abwägung sind in Friedenszeiten stark – in Krisen aber trügerisch. Sascha Lobo mahnt: Wer Intoleranz mit endloser Toleranz beantwortet, kippt in Bigotterie. Popper bleibt aktuell: Grenzen ziehen ist kein Verrat an Bürgerlichkeit, sondern ihre Bedingung.
Meinung im #Spiegel:

Superconductivity in monolayer-trilayer phase of La$_3$Ni$_2$O$_7$ under high pressure
Chaoxin Huang, Jingyuan Li, Xing Huang, Hengyuan Zhang, Deyuan Hu, Mengwu Huo, Xiang Chen, Zhen Chen, Hualei Sun, Meng Wang
https://arxiv.org/abs/2510.12250

Superconductivity in monolayer-trilayer phase of La$_3$Ni$_2$O$_7$ under high pressure
The discovery of 80 K superconductivity in pressurized bilayer Ruddlesden-Popper (RP) nickelate La$_3$Ni$_2$O$_7$ has established a new high-temperature superconductor family. The quest to understand the governing principles of RP nickelate superconductivity has become a central focus in condensed matter physics. Here, we report a critical advance by synthesizing and investigating a distinct structural polymorph of the same compound: the monolayer-trilayer (1313) hybrid phase of La$_3$Ni$_2$O$_…

Multiorbital character of the density wave instability in La$_4$Ni$_3$O$_{10}$
A. Suthar, V. Sundaramurthy, M. Bejas, Congcong Le, P. Puphal, P. Sosa-Lizama, A. Schulz, J. Nuss, M. Isobe, P. A. van Aken, Y. E. Suyolcu, M. Minola, A. P. Schnyder, Xianxin Wu, B. Keimer, G. Khaliullin, A. Greco, M. Hepting
https://arxiv.org/abs/2508.06440

Multiorbital character of the density wave instability in La$_4$Ni$_3$O$_{10}$
Ruddlesden-Popper nickelates exhibit high-temperature superconductivity closely intertwined with charge and spin density wave order. However, fundamental questions persist regarding the interplay between the associated density wave (DW) fluctuations and superconductivity, as well as the orbital character and symmetry underlying the DW instabilities. Here we utilize polarized Raman scattering to investigate the phononic and electronic Raman responses of the trilayer nickelate La$_4$Ni$_3$O$_{10}…

Strong and Engineerable Optical Anisotropy in Easily Integrable Epitaxial SrO(SrTiO 3 ) N Ruddlesden--Popper Thin Layers
Mohamed Oussama Bounab (INL - MFN), Clarisse Furgeaud (INL - MFN), S\'ebastien Cueff (INL, INL - I-Lum), Lotfi Berguiga (INL - I-Lum), Romain Bachelet (INL - MFN), Mohamed Bouras (FOTON), Laurent Pedesseau (FOTON), Jacky Even (INSA Rennes, FOTON), Ludovic Largeau (C2N), Guillaume Saint-Girons (INL - MFN)

Strong and Engineerable Optical Anisotropy in Easily Integrable Epitaxial SrO(SrTiO 3 ) N Ruddlesden--Popper Thin Layers
Optical anisotropy is a key property for numerous photonic devices. However, bulk anisotropic materials suitable for such applications remain relatively scarse and are often challenging to synthesize as thin films. Additionally, the optical losses as well as the complex structuration of anisotropic metamaterials hinder their integrability in photonic devices. Based on ellipsometry measurements coupled with reflectance, it is demonstrated here that Ruddlesden-Popper (RP) SrO(SrTiO 3 ) N phases (…

Interlayer coupling enhanced superconductivity near 100 K in La$_{3-x}$Nd$_x$Ni$_2$O$_7$
Zhengyang Qiu, Junfeng Chen, Dmitrii V. Semenok, Qingyi Zhong, Di Zhou, Jingyuan Li, Peiyue Ma, Xing Huang, Mengwu Huo, Tao Xie, Xiang Chen, Ho-kwang Mao, Viktor Struzhkin, Hualei Sun, Meng Wang
https://arxiv.org/abs/2510.12359

Interlayer coupling enhanced superconductivity near 100 K in La$_{3-x}$Nd$_x$Ni$_2$O$_7$
Systematically controlling the superconducting transition temperature ($T_\text{c}$) in the bilayer Ruddlesden-Popper nickelate La$_3$Ni$_2$O$_7$ remains a significant challenge. Here, we address this by synthesizing high-quality polycrystalline La$_{3-x}$Nd$_x$Ni$_2$O$_7$ ($0 \leq x \leq 2.4$) with record-level rare-earth substitution. Nd doping compresses the lattice, particularly along the $c$ axis, enhances the spin density wave transition temperature, and elevates the pressure required for…

Boosting Photodetection via Plasmonic Coupling in Quasi-2D Mixed-n Ruddlesden-Popper Perovskite Nanostripes
Brindhu Malani S, Eugen Klein, Ronja Maria Piehler, Rostyslav Lesyuk, Christian Klinke
https://arxiv.org/abs/2507.23727

Boosting Photodetection via Plasmonic Coupling in Quasi-2D Mixed-n Ruddlesden-Popper Perovskite Nanostripes
Quasi-2D metal halide perovskites have emerged as a promising material for photodetection due to excellent optoelectronic properties, simple synthesis, and robust stability. Albeit, developing high-performance photodetectors based on low-dimensional quasi-2D metal halide perovskite nanoparticles remains challenging due to quantum and dielectric confinement effects. Several approaches have been employed to improve efficiency, with plasmonic nanostructures being among the most effective ones. The…

Growth optimization of Ruddlesden-Popper nickelate high-temperature superconducting thin films
Wei Lv, Zihao Nie, Heng Wang, Haoliang Huang, Qikun Xue, Guangdi Zhou, Zhuoyu Chen
https://arxiv.org/abs/2508.18107

Growth optimization of Ruddlesden-Popper nickelate high-temperature superconducting thin films
The discovery of ambient-pressure nickelate high-temperature superconductivity provides a new platform for probing the underlying superconducting mechanisms. However, the thermodynamic metastability of Ruddlesden-Popper nickelates Lnn+1NinO3n+1 (Ln = lanthanide) presents significant challenges in achieving precise control over their structure and oxygen stoichiometry. This study establishes a systematic approach for growing phase-pure, high-quality Ln3Ni2O7 thin films on LaAlO3 and SrLaAlO4 sub…

🇺🇦 #NowPlaying on BBCRadio3's #ThroughTheNight
Tomasz Daroch, Maria Daroch & David Popper:
🎵 Concert Polonaise, Op 14
#TomaszDaroch #MariaDaroch #DavidPopper
https://open.spotify.com/track/12rUibWRZy3XuhVZNyCjFg

Electronic structures and superconductivity in Nd-doped La$_3$Ni$_2$O$_7$
Cui-Qun Chen, Wenyuan Qiu, Zhihui Luo, Meng Wang, Dao-Xin Yao
https://arxiv.org/abs/2510.08194 https://…

Electronic structures and superconductivity in Nd-doped La$_3$Ni$_2$O$_7$
The recent discovery of high-$T_c$ superconductivity in Ruddlesden-Popper (RP) nickelates has motivated extensive efforts to explore higher $T_c$ superconductors. Here, we systematically investigate Nd-doped La$_3$Ni$_2$O$_7$ using density functional theory (DFT) and renormalized mean-field theory (RMFT). DFT calculations reveal that both the lattice constants and interlayer spacing decrease upon Nd substitution, similar to the effect of physical pressure. However, the in-plane Ni-O-Ni bond ang…

Absence of two-orbital superconductivity in cuprate family: A DFT DMFT perspective
Jian-Hong She, Jing-Xuan Wang, Rong-Qiang He, Zhong-Yi Lu
https://arxiv.org/abs/2509.08823 htt…

Absence of two-orbital superconductivity in cuprate family: A DFT+DMFT perspective
The recent discovery of high-temperature superconductivity in the bilayer nickelate La$_3$Ni$_2$O$_7$ has spurred intense interest in exploring analogous mechanisms in other transition metal oxides. This raises a pivotal question: can cuprates, as neighbors to nickelates in the periodic table, host similar two-orbital superconductivity? Here, we systematically investigate the electronic structure of a series of designed Ruddlesden-Popper cuprates. Our calculations reveal that the parent compoun…

Revival of Layered Ferroelectrics in Thin Films
Elzbieta Gradauskaite
https://arxiv.org/abs/2508.20742 https://arxiv.org/pdf/2508.20742

Revival of Layered Ferroelectrics in Thin Films
Layered perovskites are a versatile class of ferroelectrics with their structural anisotropy reflected in unusual electrostatics that give rise to exceptional ferroelectric properties. These materials fall into four main families: Aurivillius, Carpy-Galy, Ruddlesden-Popper, and Dion-Jacobson phases; each forming natural superlattices by interleaving perovskite slabs with spacer layers. For a long time, these materials were considered too structurally complex to prepare as high-quality thin film…

Ambient-pressure superconductivity and electronic structures of engineered hybrid nickelate films
Zihao Nie, Yueying Li, Wei Lv, Lizhi Xu, Zhicheng Jiang, Peng Fu, Guangdi Zhou, Wenhua Song, Yaqi Chen, Heng Wang, Haoliang Huang, Junhao Lin, Dawei Shen, Peng Li, Qi-Kun Xue, Zhuoyu Chen
https://arxiv.org/abs/2509.03502

Ambient-pressure superconductivity and electronic structures of engineered hybrid nickelate films
Ruddlesden-Popper (RP) nickelates have emerged as a crucial platform for exploring the mechanisms of high-temperature superconductivity. However, the Fermi surface topology required for superconductivity remains elusive. Here, we report the thin film growth and ambient-pressure superconductivity of both hybrid monolayer-bilayer (1212) and pure bilayer (2222) structures, together with the absence of superconductivity in hybrid monolayer-trilayer (1313) structure, under identical compressive epit…

Out-of-plane ferroelectricity, magnetoelectric coupling and persistent spin texture in two-dimensional multiferroics
Ying Zhou, Cheng-Ao Ji, Shuai Dong, Xuezeng Lu
https://arxiv.org/abs/2507.18018

Out-of-plane ferroelectricity, magnetoelectric coupling and persistent spin texture in two-dimensional multiferroics
Two dimensional multiferroics with out of plane ferroelectricity hold significant promise for miniaturized magnetoelectric spin-orbit transistors, yet systems combining robust ferroelectricity and strong magnetoelectric coupling are exceedingly rare. Here, we demonstrate that epitaxial strain stabilizes out of plane ferroelectricity in exfoliated two dimensional Ruddlesden Popper derivatives. The hybrid improper ferroelectric Pc phase transitions to a competing P21 phase with purely in plane po…

Distinct orbital contributions to electronic and magnetic structures in La$_{4}$Ni$_{3}$O$_{10}$
Shilong Zhang, Hengyuang Zhang, Zehao Dong, Jie Li, Qian Xiao, Mengwu Huo, Hsiao-Yu Huang, Di-Jing Huang, Yayu Wang, Yi Lu, Zhen Chen, Meng Wang, Yingying Peng
https://arxiv.org/abs/2509.20727

Distinct orbital contributions to electronic and magnetic structures in La$_{4}$Ni$_{3}$O$_{10}$
High-T$_c$ superconductivity has recently been discovered in Ruddlesden-Popper phase nickelates under pressure, where the low-energy electronic structure is dominated by Ni $d_{x^2 - y^2}$ and $d_{z^2}$ orbitals. However, the respective roles of these orbitals in superconductivity remain unclear. Here, by combining X-ray absorption, electron energy loss spectroscopy, and density functional theory calculations on La$_{4}$Ni$_{3}$O$_{10}$ single crystals, we identify ligand holes in the $p_{x,y}$…

Signatures of spin-glass superconductivity in nickelate (La, Pr, Sm)3Ni2O7 films
Haoran Ji, Zheyuan Xie, Yaqi Chen, Guangdi Zhou, Longxin Pan, Heng Wang, Haoliang Huang, Jun Ge, Yi Liu, Guang-Ming Zhang, Ziqiang Wang, Qi-Kun Xue, Zhuoyu Chen, Jian Wang
https://arxiv.org/abs/2508.16412

Signatures of spin-glass superconductivity in nickelate (La, Pr, Sm)3Ni2O7 films
The discovery of Ruddlesden-Popper (R-P) nickelate superconductors under high pressure heralds a new chapter of high-transition temperature (high-Tc) superconductivity. Recently, ambient-pressure superconductivity is achieved in R-P bilayer nickelate thin films through epitaxial compressive strain, unlocking in-depth investigations into the superconducting characteristics. Here, through electrical transport study, we report the observation of spin-glass superconductivity with hysteretic magneto…