101 citations · 495 across the 28 of their papers we have counts for
28 papers
Hair is a functionally graded composite, not a uniform fiber
Andrew K. Schulz, Svetlana Griego, Vesna Srot +11
Hair provides mammals with diverse benefits, including protection, thermoregulation, and enhanced sensory perception. Unlike tendons and teeth, which are biomineralized, hair is hy…
Multiorbital character of the density wave in trilayer nickelate superconductors
A. Suthar, V. Sundaramurthy, M. Bejas +15
Ruddlesden-Popper nickelates exhibit high-temperature superconductivity closely intertwined with charge and spin density waves. However, fundamental questions persist regarding the…
Direct imaging of disordered residual oxygen and its impact on electronic structure in an infinite-layer nickelate superlattice
Chao Yang, Hongguang Wang, Roberto A. Ortiz +4
Infinite layer nickelates have garnered significant attention due to their potential for high-temperature superconductivity. Despite extensive research, the interplay between oxyge…
Adsorption-controlled Growth of Homoepitaxial c-plane Sapphire Films
Lena N. Majer, Tolga Acartürk, Peter A. van Aken +13
Sapphire is a technologically highly relevant material, but it poses many challenges to performing epitaxial thin-film deposition. We have identified and applied the conditions for…
alpha-Ta Films on c-plane Sapphire with Enhanced Microstructure
Lena N. Majer, Sander Smink, Wolfgang Braun +7
Superconducting films of alpha-Ta are promising candidates for the fabrication of advanced superconducting qubits. However, alpha-Ta films suffer from many growth-induced structura…
Unraveling nano-scale effects of topotactic reduction in LaNiO crystals
Yu-Mi Wu, Pascal Puphal, Masahiko Isobe +4
Infinite-layer nickelates stand as a promising frontier in the exploration of unconventional superconductivity. Their synthesis through topotactic oxygen reduction from the parent…
Ultrafast phonon-mediated dephasing of color centers in hexagonal boron nitride probed by electron beams
Masoud Taleb, Paul Bittorf, Mximilian Black +7
Defect centers in hexagonal boron nitride have been extensively studied as room temperature single photon sources. The electronic structure of these defects exhibits strong couplin…
Interface Design Beyond Epitaxy: Oxide Heterostructures Comprising Symmetry-forbidden Interfaces
Hongguang Wang, Varun Harbola, Yu-Jung Wu +2
Epitaxial growth of thin-film heterostructures is generally considered the most successful procedure to obtain interfaces of excellent structural and electronic quality between thr…
Investigation of spin excitations and charge order in bulk crystals of the infinite-layer nickelate LaNiO
S. Hayashida, V. Sundaramurthy, P. Puphal +10
Recent x-ray spectroscopic studies have revealed spin excitations and charge density waves in thin films of infinite-layer (IL) nickelates. However, clarifying whether the origin o…
Unconventional crystal structure of the high-pressure superconductor LaNiO
Pascal Puphal, Pascal Reiss, Niklas Enderlein +14
The discovery of high-temperature superconductivity in LaNiO at pressures above 14 GPa has spurred extensive research efforts. Yet, fundamental aspects of the supercond…
Magnetotransport Properties of Epitaxial Films and Hall Bar Devices of the Correlated Layered Ruthenate SrRuO
Prosper Ngabonziza, Anand Sharma, Anna Scheid +3
For epitaxial SrRuO films grown by pulsed laser deposition, we report a combined structural and magnetotransport study of thin films and Hall bar devices patterned side…
Topotactically induced oxygen vacancy order in nickelate single crystals
Yu-Mi Wu, Pascal Puphal, Hangoo Lee +6
The strong structure-property coupling in rare-earth nickelates has spurred the realization of new quantum phases in rapid succession. Recently, topotactic transformations have pro…
Lithium storage in titania films as a function of position: Unification of intercalation electrode and super-capacitor concepts
Chuanlian Xiao, Hongguang Wang, Peter A. van Aken +2
We carefully investigated the storage of lithium in titania films on various substrates as a function of thickness. The experiments enable us to precisely separate contributions fr…
Employing High-temperature-grown SrZrO Buffer to Enhance the Electron Mobility in La:BaSnO-based Heterostructures
Prosper Ngabonziza, Jisung Park, Wilfried Sigle +3
We report a synthetic route to achieve high electron mobility at room temperature in epitaxial La:BaSnO/SrZrO heterostructures prepared on several oxide substrates. Room-te…
Crystallization of heavy fermions via epitaxial strain in spinel LiVO thin film
U. Niemann, Y. -M. Wu, R. Oka +6
The mixed-valent spinel LiVO is known as the first oxide heavy-fermion system. There is a general consensus that a subtle interplay of charge, spin, and orbital degrees…
Combined Spectroscopy and Electrical Characterization of La:BaSnO Thin Films and Heterostructures
Arnaud P. Nono Tchiomo, Emanuela Carleschi, Aletta R. E. Prinsloo +5
For La-doped BaSnO thin films grown by pulsed laser deposition, we combine chemical surface characterization and electronic transport studies to probe the evolution of e…
Pauli-limit violation in lanthanide infinite-layer nickelate superconductors
L. E. Chow, K. Y. Yip, M. Pierre +15
Superconductivity can be destroyed by a magnetic field with an upper bound known as the Pauli-limit in spin-singlet superconductors. Almost all the discovered superconductors are s…
Pairing symmetry in infinite-layer nickelate superconductor
L. E. Chow, S. Kunniniyil Sudheesh, Z. Y. Luo +11
The superconducting infinite-layer nickelate family has risen as a promising platform for revealing the mechanism of high-temperature superconductivity. However, its challenging ma…
Topotactic transformation of single-crystals: from perovskite to infinite-layer nickelates
Pascal Puphal, Yu-Mi Wu, Katrin Fürsich +9
Topotactic transformations between related crystal structures are a powerful emerging route for the synthesis of novel quantum materials. Whereas most such "soft chemistry" experim…
Single indium atoms and few-atom indium clusters anchored onto graphene via silicon heteroatoms
Kenan Elibol, Clemens Mangler, David D. O'Regan +7
Single atoms and few-atom nanoclusters are of high interest in catalysis and plasmonics, but pathways for their fabrication and stable placement remain scarce. We report here the s…
Complex magnetic order in nickelate slabs
Matthias Hepting, Robert J. Green, Zhicheng Zhong +18
Magnetic ordering phenomena have a profound influence on the macroscopic properties of correlated-electron materials, but their realistic prediction remains a formidable challenge.…
High-temperature-grown buffer layer boosts electron mobility in epitaxial La-doped BaSnO/SrZrO heterostructures
Arnaud P. Nono Tchiomo, Wolfgang Braun, Bryan P. Doyle +4
By inserting a SrZrO buffer layer between the film and the substrate, we demonstrate a significant reduction of the threading dislocation density with an associated improvement…
Digital modulation of the nickel valence state in a cuprate-nickelate heterostructure
F. Wrobel, B. Geisler, Y. Wang +8
Layer-by-layer oxide molecular beam epitaxy has been used to synthesize cuprate-nickelate multilayer structures of composition (LaCuO)/LaO/(LaNiO). In a combine…
Comparative study of LaNiO/LaAlO heterostructures grown by pulsed laser deposition and oxide molecular beam epitaxy
F. Wrobel, A. F. Mark, G. Christiani +6
Variations in growth conditions associated with different deposition techniques can greatly affect the phase stability and defect structure of complex oxide heterostructures. We sy…