Temperature-Dependent Structural Evolution of Ruddlesden–Popper Bilayer Nickelate La3Ni2O7 DOI Creative Commons
Haozhe Wang, Haidong Zhou, Weiwei Xie

et al.

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 10, 2025

A recent article ( J. Am. Chem. Soc. 2024, 146, 7506–7514) details a pressure–temperature (P–T) phase diagram for the Ruddlesden–Popper bilayer nickelate La3Ni2O7 (LNO-2222) using synchrotron X-ray diffraction. This study identifies transition from Amam (#63) to Fmmm (#69) within temperature range of 104–120 K under initial pressure and attributes I4/mmm (#139) space group structure responsible superconductivity LNO-2222. Herein, we examine temperature-dependent structural evolution LNO-2222 single crystals at ambient pressure. Contrary symmetry increase established Amam–Fmmm boundary, observe an enhancement in reflections as decreases. work not only delivers high-quality crystallographic data laboratory X-rays across various temperatures but also enhances understanding complex behavior this system, contributing insights further experimental theoretical explorations.

Language: Английский

Visualization of oxygen vacancies and self-doped ligand holes in La3Ni2O7−δ DOI
Zehao Dong,

Mengwu Huo,

Jie Li

et al.

Nature, Journal Year: 2024, Volume and Issue: 630(8018), P. 847 - 852

Published: June 5, 2024

Language: Английский

Citations

88
Bulk high-temperature superconductivity in pressurized tetragonal La2PrNi2O7 DOI
Ningning Wang, Gang Wang, Xiaoling Shen

et al.

Nature, Journal Year: 2024, Volume and Issue: 634(8034), P. 579 - 584

Published: Oct. 2, 2024

Language: Английский

Citations

38
Long-Range Structural Order in a Hidden Phase of Ruddlesden–Popper Bilayer Nickelate La3Ni2O7 DOI Creative Commons
Haozhe Wang, Long Chen,

Aya Rutherford

et al.

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(11), P. 5020 - 5026

Published: March 5, 2024

The recent discovery of superconductivity in the Ruddlesden–Popper bilayer nickelate, specifically La3Ni2O7, has generated significant interest exploration high-temperature within this material family. In study, we present crystallographic and electrical resistivity properties two distinct nickelates: La3Ni2O7 (referred to as 2222-phase) a previously uncharacterized phase, (1313-phase). 2222-phase is characterized by pseudo F-centered orthorhombic lattice, featuring perovskite [LaNiO3] layers interspaced rock salt [LaO] layers, forming repeated ...2222... sequence. Intriguingly, 1313-phase, which displays semiconducting properties, crystallizes Cmmm space group exhibits pronounced predilection for C-centered lattice. Within structure, exhibit distinctive long-range ordered arrangement, alternating between single- trilayer configurations, resulting ...1313... This report contributes novel insights into crystallography structure–property relationship nickelates, paving way further investigations their unique physical properties.

Language: Английский

Citations

34
Normal and Superconducting Properties of La3Ni2O7 DOI Creative Commons
Meng Wang, Hai‐Hu Wen, Tao Wu

et al.

Chinese Physics Letters, Journal Year: 2024, Volume and Issue: 41(7), P. 077402 - 077402

Published: June 26, 2024

Abstract This review provides a comprehensive overview of current research on the structural, electronic, and magnetic characteristics recently discovered high-temperature superconductor La 3 Ni 2 O 7 under high pressures. We present experimental results for synthesizing characterizing this material, derived from measurements transport, thermodynamics, various spectroscopic techniques, discuss their physical implications. also explore theoretical models proposed to describe electronic structures superconducting pairing symmetry in , highlighting intricate interplay between correlations interactions. Despite these advances, challenges remain growing high-quality samples free extrinsic phases oxygen deficiencies developing reliable measurement tools determining diamagnetism other quantities Further investigations areas are essential deepening our understanding properties unlocking its mechanism.

Language: Английский

Citations

33
Unconventional Crystal Structure of the High-Pressure Superconductor La3Ni2O7 DOI Creative Commons
Pascal Puphal, Pascal Reiss, Niklas Enderlein

et al.

Physical Review Letters, Journal Year: 2024, Volume and Issue: 133(14)

Published: Oct. 4, 2024

The discovery of high-temperature superconductivity in La3Ni2O7 at pressures above 14 GPa has spurred extensive research efforts. Yet, fundamental aspects the superconducting phase, including possibility a filamentary character, are currently subjects controversial debates. Conversely, crystal structure with NiO6 octahedral bilayers stacked along c-axis direction was consistently posited initial studies on La3Ni2O7. Here, we reassess this optical floating zone-grown La3Ni2O7 single crystals that show signs superconductivity. Employing scanning transmission electron microscopy and single-crystal x-ray diffraction under high pressures, observe multiple crystallographic phases these crystals, majority phase exhibiting alternating monolayers trilayers NiO6 octahedra, signifying profound deviation from previously suggested bilayer structure. Using density functional theory, disentangle individual contributions monolayer trilayer structural units to electronic band La3Ni2O7, providing firm basis for advanced theoretical modeling future evaluations potential monolayer-trilayer hosting Published by American Physical Society 2024

Language: Английский

Citations

26
Electronic structure and magnetic tendencies of trilayer La4Ni3O10 under pressure: Structural transition, molecular orbitals, and layer differentiation DOI
Harrison LaBollita, Jesse Kapeghian, M. R. Norman

et al.

Physical review. B./Physical review. B, Journal Year: 2024, Volume and Issue: 109(19)

Published: May 15, 2024

Motivated by the recent observation of superconductivity in pressurized trilayer Ruddlesden-Popper (RP) nickelate ${\mathrm{La}}_{4}{\mathrm{Ni}}_{3}{\mathrm{O}}_{10}$, we explore its structural, electronic, and magnetic properties as a function hydrostatic pressure from first-principles calculations. We find that an orthorhombic (monoclinic)-to-tetragonal transition under takes place concomitantly with onset superconductivity. The electronic structure ${\mathrm{La}}_{4}{\mathrm{Ni}}_{3}{\mathrm{O}}_{10}$ can be understood using molecular trimer basis wherein $n$ subbands arise ${d}_{{z}^{2}}$ orbitals hybridize strongly along $c$ axis within trilayer. tendencies indicate ground state at ambient is formed nonmagnetic inner planes stripe-ordered outer are antiferromagnetically coupled axis, resulting unusual $\ensuremath{\uparrow}$, 0, $\ensuremath{\downarrow}$ stacking consistent spin density wave model previously suggested neutron diffraction. Such destabilized where arises. Despite presence states Fermi level, ${d}_{{x}^{2}\ensuremath{-}{y}^{2}}$ also play key role ${\mathrm{La}}_{4}{\mathrm{Ni}}_{3}{\mathrm{O}}_{10}$. This active low-energy physics RP nickelate, together distinct behavior planes, resembles multilayer cuprates.

Language: Английский

Citations

19
Investigations of key issues on the reproducibility of high-T c superconductivity emerging from compressed La3Ni2O7 DOI Creative Commons
Yazhou Zhou, Jing Guo,

Shu Cai

et al.

Matter and Radiation at Extremes, Journal Year: 2025, Volume and Issue: 10(2)

Published: Jan. 21, 2025

Signatures of superconductivity near 80 K have recently been discovered in single crystals La3Ni2O7 under pressure, which makes it a new candidate for high-temperature superconductors dominated by 3d transition elements, following the cuprate and iron-pnictide superconductors. However, there are several critical questions that perplexing scientific community: (1) What factors contribute to inconsistent reproducibility experimental results? (2) is fundamental nature pressure-induced superconductivity: bulk or nonbulk (filamentary-like)? (3) Where superconducting phase located within sample if filamentary-like? (4) Is oxygen content important development stabilization superconductivity? In this study, we employ comprehensive high-pressure techniques address these questions. Through our modulated ac susceptibility measurements, first find nickelate filamentary-like. Our scanning transmission electron microscopy investigations suggest filamentary-like most likely emerges at interface between La4Ni3O10 phases. By tuning polycrystalline La3Ni2O7, also plays vital role material. The upper lower bounds on 7.35 6.89, respectively. results provide not only insights into puzzling issues regarding material, but significant information will enable better understanding its superconductivity.

Language: Английский

Citations

17
Pressure-enhanced spin-density-wave transition in double-layer nickelate La3Ni2O7−δ DOI
Dan Zhao,

Yanbing Zhou,

Mengwu Huo

et al.

Science Bulletin, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 1, 2025

Language: Английский

Citations

7
Chemical versus physical pressure effects on the structure transition of bilayer nickelates DOI Creative Commons
Gang Wang, Ningning Wang, Tenglong Lu

et al.

npj Quantum Materials, Journal Year: 2025, Volume and Issue: 10(1)

Published: Jan. 2, 2025

Language: Английский

Citations

3
Resolving the electronic ground state of La3Ni2O7-δ films DOI Creative Commons
Xiaolin Ren, Ronny Sutarto, Xianxin Wu

et al.

Communications Physics, Journal Year: 2025, Volume and Issue: 8(1)

Published: Feb. 3, 2025

The recent discovery of a superconductivity signature in La3Ni2O7-δ under pressure 14 GPa, with superconducting transition temperature around 80 K, has attracted considerable attention. An important aspect investigating electronic structures is discerning the extent to which ground state resembles parent cuprate superconductor, charge transfer insulator long-range antiferromagnetism. Through X-ray absorption spectroscopy, we reveal influence oxygen ligands on states Ni ions, displaying nature akin but distinct orbital configurations. Additionally, films, detect superlattice reflection (1/4, 1/4, L) at L edge using resonant scattering measurements. Further examination resonance profile indicates that originates from d orbitals. By evaluating reflection's azimuthal angle dependence, confirm presence collinear antiferromagnetic spin ordering and charge-like anisotropy ordered same periodicity. Our findings microscopic relationship between these two components dependence intensity reflection. This investigation enriches our understanding high-temperature high pressure. bilayer nickelates offers new material platform explore superconductivity. In this study, authors identify La3Ni2O7 film ambient revealing critical role ligand existence along anisotropy.

Language: Английский

Citations

3