294 citations · 494 across the 15 of their papers we have counts for
15 papers
Electrostatically-induced strain of graphene on GaN nanorods
Jakub Kierdaszuk, Rafał Bożek, Tomasz Stefaniuk +11
Few-layer graphene deposited on semiconductor nanorods separated by undoped spacers has been studied in perspective for the fabrication of stable nanoresonators. We show that an ap…
Competing spin-orbital singlet states in the 4 honeycomb ruthenate AgLiRuO
T. Takayama, M. Blankenhorn, J. Bertinshaw +25
When spin-orbit-entangled -electrons reside on a honeycomb lattice, rich quantum states are anticipated to emerge, as exemplified by the Kitaev materials. Distinct yet equ…
Crystal-field states and defect levels in candidate quantum spin ice CeHfO
Victor Porée, Elsa Lhotel, Sylvain Petit +8
We report the synthesis of powder and single-crystal samples of the cerium pyrohafnate and their characterization using neutron diffraction, thermogravimetry and X-ray absorption s…
Formation of orbital molecules on a pyrochlore lattice induced by A-O bond covalency
A. Krajewska, A. Yaresko, J. Nuss +15
The pyrochlore ruthenate InRuO displays a subtle competition between spin-orbital entanglement and molecular orbital formation. At room temperature, a spin-orbit-entang…
A model for coupled magnetic spectra: a neutron scattering study of the YbFe hybridisation in YbFeO
Viviane Peçanha-Antonio, Dharmalingam Prabhakaran, Christian Balz +2
In this work, we explore experimentally and theoretically the spectrum of magnetic excitations of the Fe and Yb ions in ytterbium iron garnet (YbFeO).…
Pseudomagnetic fields and strain engineering: graphene on GaN nanowires
Jakub Kierdaszuk, Paweł Dąbrowski, Maciej Rogala +11
Gallium nitride nanowire and nanorod substrates with different morphology are prospective platforms allowing to control the local strain distribution in graphene films top of them,…
Highly effective gating of graphene on GaN
Jakub Kierdaszuk, Ewelina Rozbiegała, Karolina Piętak +8
By using four layered graphene/gallium nitride (GaN) Schottky diodes with an undoped GaN spacer, we demonstrate highly effective gating of graphene at low bias rendering this type…
Lattice dynamics and structural transition of the hyperhoneycomb iridate -LiIrO investigated by high-pressure Raman scattering
Sungkyun Choi, Heung-Sik Kim, Hun-Ho Kim +8
We report a polarized Raman scattering study of the lattice dynamics of -LiIrO under hydrostatic pressures up to 7.62 GPa. At ambient pressure, -LiIrO exhibit…
Properties of graphene deposited on GaN nanowires: influence of nanowire roughness, self-induced nanogating and defects
Jakub Kierdaszuk, Piotr Kaźmierczak, Justyna Grzonka +8
We present detailed Raman studies of graphene deposited on gallium nitride nanowires with different variations in height. Our results show that different density and height of nano…
Surface-enhanced Raman scattering in graphene deposited on AlGaN/GaN axial heterostructure nanowires
Jakub Kierdaszuk, Mateusz Tokarczyk, Krzysztof M. Czajkowski +11
The surface-enhanced Raman scattering in graphene deposited on AlxGa1-xN/GaN axial heterostructure nanowires was investigated. The intensity of graphene Raman spectra was found not…
Almost pure Mott state of InIrO in the limit of reduced inter-site hopping
A. Krajewska, T. Takayama, R. Dinnebier +4
The pyrochlore iridate InIrO is a strong Mott insulator with frustrated magnetism. Despite the large trigonal crystal field, a small admixture…
Surface-enhanced Raman scattering of graphene caused by self-induced nanogating by GaN nanowire array
Jakub Kierdaszuk, Piotr Kaźmierczak, Rafał Bożek +9
A constant height of gallium nitride (GaN) nanowires with graphene deposited on them is shown to have a strong enhancement of Raman scattering, whilst variable height nanowires fai…
Negative Kerr nonlinearity of graphene as seen via chirped-pulse-pumped self-phase modulation
Nathalie Vermeulen, David Castello-Lurbe, JinLuo Cheng +6
We experimentally demonstrate a negative Kerr nonlinearity for quasi-undoped graphene. Hereto, we introduce the method of chirped-pulse-pumped self-phase modulation and apply it to…
Enhanced Raman scattering and weak localization in graphene deposited on GaN nanowires
Jakub Kierdaszuk, Piotr Kaźmierczak, Aneta Drabińska +8
The influence of GaN nanowires on the optical and electrical properties of graphene deposited on them was studied using Raman spectroscopy and microwave induced electron transport…
Residual Metallic Contamination of Transferred Chemical Vapor Deposited Graphene
Grzegorz Lupina, Julia Kitzmann, Ioan Costina +15
Integration of graphene with Si microelectronics is very appealing by offering potentially a broad range of new functionalities. New materials to be integrated with Si platform mus…