Publications by László Forró

Tuning the color of high-karat gold in Au-TiO2 nanoparticle composites all the way to black

László Forró, Andrzej Sienkiewicz, Claudio Grimaldi, Endre Horvath

For centuries, artisans have harnessed gold nanoparticles to imbue their creations with the vibrant hues that captivate the eye through interactions with visible light. In modern times, these distinct optoelectronic characteristics have pivoted toward the ...

Cell Press2024

Interplay between disorder and electronic correlations in compositionally complex alloys

László Forró, Luka Ciric, Xavier François Mettan, Jan Hugo Dil, Edoardo Martino, Davor Tolj, Trpimir Ivsic

Owing to their exceptional mechanical, electronic, and phononic transport properties, compositionally complex alloys, including high-entropy alloys, represent an important class of materials. However, the interplay between chemical disorder and electronic ...

Nature Research2024

Electron Glass Phase with Resilient Zhang-Rice Singlets in LiCu3O3

László Forró, Rosario Scopelliti, Arnaud Magrez, Krunoslav Prsa, Henrik Moodysson Rønnow, Simon Karl Moser, Jens Christian Johannsen, Paul Gregory Freeman, Edoardo Martino, Gianmarco Gatti

LiCu3O3 is an antiferromagnetic mixed valence cuprate where trilayers of edge -sharing Cu(II)O (3d9) are sandwiched in between planes of Cu(I) (3d10) ions, with Li stochastically substituting Cu(II). Angle resolved photoemission spectroscopy (ARPES) and de ...

Amer Physical Soc2024

Perovskite-based detector for reactor dosimetry monitoring

László Forró, Endre Horvath, Pavel Frajtag, Andreas Pautz, Péter Szirmai, Márton Kollár

Hybrid halide perovskites have demonstrated significant efficiency in detecting a broad spectrum of high-energy radiation, including X-rays, gamma rays (γ-rays), and neutrons. Given the common occurrence of mixed radiation fields, we investigated the perfo ...

EDP Sciences2024

Terahertz emission from diamond nitrogen-vacancy centers

László Forró, Ferenc Simon, Sándor Kollarics, Bence Gábor Márkus

Coherent light sources emitting in the terahertz range are highly sought after for fundamental research and applications. Terahertz lasers rely on achieving population inversion. We demonstrate the generation of terahertz radiation using nitrogen-vacancy c ...

Amer Assoc Advancement Science2024

Effect of the Deposition of Vanadium-Oxide on the Photocatalytic Activity of TiO2 Nanotubes and Its Photodiode Performance Interfaced with CH3NH3PbI3 Single Crystal

László Forró, Endre Horvath, Pavao Roko Andricevic

In this study, we report the influence of vanadium oxide (VO), as a photosensitive component, on the photoactivity of TiO2 nanotubes (TNTs). A series of TNTs of varying tube diameter were synthesized by the anodization of titanium foils at different voltag ...

MDPI2023

Origin of Subgap States in Normal-Insulator-Superconductor van der Waals Heterostructures

Helmuth Berger, László Forró

Superconductivity in van der Waals materials, such as NbSe2 and TaS2, is fundamentally novel due to the effects of dimensionality, crystal symmetries, and strong spin-orbit coupling. In this work, we perform tunnel spectroscopy on NbSe2 by utilizing MoS2 o ...

AMER CHEMICAL SOC2023

Ultralong 100 ns spin relaxation time in graphite at room temperature

László Forró, Bálint Náfrádi, Péter Szirmai, Bence Gábor Márkus

Graphite has been intensively studied, yet its electron spins dynamics remains an unresolved problem even 70 years after the first experiments. The central quantities, the longitudinal (T-1) and transverse (T-2) relaxation times were postulated to be equal ...

Nature Portfolio2023

Electronic transport and magnetism in the alternating stack of metallic and highly frustrated magnetic layers in Co(1/3)NbS(2)

Helmuth Berger, László Forró, Julian Piatek, Henrik Moodysson Rønnow, Ivica Zivkovic, Jacim Jacimovic, Nikolay Tsyrulin

Transition-metal dichalcogenides (TMDs) are layered compounds that support many electronic phases, including various charge density waves, superconducting, and Mott insulating states. Their intercalation with magnetic ions introduces magnetic sublayers, wh ...

AMER PHYSICAL SOC2023

Solar water purification with photocatalytic nanocomposite filter based on TiO2 nanowires and carbon nanotubes

Luca Rossi, László Forró, Dominique Grandjean, Andrzej Sienkiewicz, Florian Frédéric Vincent Breider, Endre Horvath, Miriam Gaál

Water contamination due to environmental conditions and poor waste management in certain areas of the world represents a serious problem in accessing clean and safe drinking water. This problem is especially critical in electricity-poor regions, where adva ...

2022

Second-harmonic generation in atomically thin 1T-TiSe2 and its possible origin from charge density wave transitions

Helmuth Berger, László Forró

Optical second-harmonic generation (SHG) can only occur in noncentrosymmetric crystals in the leading electric-dipole approximation. Transition metal dichalcogenides with the 1T octahedral coordination is centrosymmetric, hence precluding SHG. Here we repo ...

AMER PHYSICAL SOC2022

High-pressure investigations in CH3NH3PbX3 (X = I, Br, and Cl): Suppression of ion migration and stabilization of low-temperature structure

László Forró, Endre Horvath, Márton Kollár

Hybrid organic-inorganic halide perovskites represent a promising next-generation photovoltaic material with drawbacks for structure stability and composition concerns. Demonstrations of ion migration and molecular dynamics suggest room for structural cont ...

AMER PHYSICAL SOC2022

Fast Lead-Free Humidity Sensor Based on Hybrid Halide Perovskite

Dragan Damjanovic, László Forró, Alla Arakcheeva, Endre Horvath, Pavao Roko Andricevic, Márton Kollár, Trpimir Ivsic

An environmentally friendly analog of the prominent methylammonium lead halide perovskite, methylammonium bismuth bromide (MA3Bi2Br9), was prepared and investigated in the form of powder, single crystals and nanowires. Complete characterization via synchro ...

2022

van der Waals pi Josephson Junctions

Helmuth Berger, László Forró

Proximity-induced superconductivity in a ferromagnet can induce Cooper pairs with a finite center-of-mass momentum and stabilize Josephson junctions (JJs) with pi phase difference in superconductor-ferromagnet-superconductor heterostructures. The emergence ...

AMER CHEMICAL SOC2022

Axial-Bonding-Driven Dimensionality Effect on the Charge-Density Wave in NbSe2

Helmuth Berger, László Forró

2H-NbSe2 is a prototypical charge-density-wave (CDW) system, exhibiting such a symmetry-breaking quantum ground state in its bulk and down to a single-atomic-layer limit. However, how this state depends on dimensionality and what governs the dimensionality ...

AMER CHEMICAL SOC2022

“Forbidden” Polarisation and Extraordinary Piezoelectric Effect in Organometallic Lead Halide Perovskites

Dragan Damjanovic, László Forró, Endre Horvath, Márton Kollár, Lukas Riemer

Organometallic lead halide perovskites are highly efficient materials for solar cells and other optoelectronic applications due to their high quantum efficiency and exceptional semiconducting properties. A peculiarity of these perovskites is the substantia ...

2022

Ultralong Charge Carrier Recombination Time in Methylammonium Lead Halide Perovskites

László Forró, Andrzej Sienkiewicz, Márton Kollár, Ferenc Simon

Due to their exceptional photovoltaic properties, metal halide perovskites (MHPs) are extensively studied for their potential applications in solar cells. In recent years, the power conversion efficiencies of MHPs-based solar cells rapidly increased from t ...

2022

Role of intercalated cobalt in the electronic structure of Co1/3NbS2

Helmuth Berger, László Forró

Co1/3NbS2 is the magnetic intercalate of 2H-NbS2 where electronic itinerant and magnetic properties strongly influence each other throughout the phase diagram. Here we report the angle-resolved photoelectron spectroscopy (ARPES) study in Co1/3NbS2. In agre ...

AMER PHYSICAL SOC2022

Synthesis of murunskite single crystals: A bridge between cuprates and pnictides

László Forró, Ana Akrap, Henrik Moodysson Rønnow, Ivica Zivkovic, Edoardo Martino, Davor Tolj, Trpimir Ivsic, Konstantin Semeniuk

Numerous contemporary investigations in condensed matter physics are devoted to high temperature (high-T-c) cuprate superconductors. Despite its unique effulgence among research subjects, the enigma of the high-T-c mechanism still persists. One way to adva ...

ELSEVIER2021

Ultrasensitive 3D Aerosol-Jet-Printed Perovskite X-ray Photodetector

László Forró, Alla Arakcheeva, Bálint Náfrádi, Endre Horvath, Pavao Roko Andricevic, Anastasiia Glushkova, Márton Kollár

X-ray photon detection is important for a wide range of applications. The highest demand, however, comes from medical imaging, which requires cost-effective, high-resolution detectors operating at low-photon flux, therefore stimulating the search for novel ...

2021