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Experiments aiming to directly detect dark matter through particle recoils can achieve energy thresholds of $\mathcal{O}(1\,\mathrm{eV})$. In this regime, ionization signals from small-angle Compton scatters of environmental $\gamma$-rays…

Metal oxide thin films are of great interest in scientific advancement, particularly semiconductor thin films in transistors and in a wide range of optoelectronic applications. Many metal oxide thin films attract interest for their…

Applied Physics · Physics 2024-11-21 Darragh Buckley , Alex Lonergan , Colm O'Dwyer

Predictive first-principles calculations suggest graphitic-like GaN to be theoretically possible. Thus far, it has not been experimentally reported. We report on GaN monolayer in a buckled geometry obtained in confinement at graphene/SiC…

When a sample is exposed using electron-beam lithography, the electrons scatter deep and far in the substrate, resulting in unwanted deposition of dose at both the nano- and the microscale. This proximity effect can be mitigated by…

Ab initio calculations within the density-functional theory formalism are performed to investigate the chemical functionalization of a graphene-like monolayer of silicon - silicene - with B, N, Al or P atoms. The structural, electronic,…

Materials Science · Physics 2014-09-05 Jozef Sivek , Hasan Şahin , Bart Partoens , François M. Peeters

This paper presents an overview of scanning-gate microscopy applied to the imaging of electron transport through buried semiconductor nanostructures. After a brief description of the technique and of its possible artifacts, we give a…

Mesoscale and Nanoscale Physics · Physics 2011-04-13 F. Martins , B. Hackens , H. Sellier , P. Liu , M. G. Pala , S. Baltazar , L. Desplanque , X. Wallart , V. Bayot , S. Huant

Metals are commonly used as electrostatic gates in devices due to their abundant charge carrier densities that are necessary for efficient charging and discharging. A semiconducting gate can be beneficial for certain fabrication processes,…

Multilayer graphene (MLG) thin films are deposited on silicon oxide substrates by mechanical exfoliation (or 'scotch-tape method') from Kish graphite. The thickness and number of layers are determined from both Atomic Force Microscopy (AFM)…

Mesoscale and Nanoscale Physics · Physics 2014-08-26 E. S. Sadki , H. Okazaki , T. Watanabe , T. Yamaguchi , Y. Takano

The concept of alloy engineering has emerged as a viable technique towards tuning the bandgap as well as engineering the defect levels in two-dimensional transition metal dichalcognides (TMDC). Possibility to synthesize these ultrathin TMDC…

Materials Science · Physics 2022-07-01 Shubhrasish Mukherjee , Didhiti Bhattacharya , Samit Kumar Ray , Atindra Nath Pal

Self-driving labs (SDLs), employing automation and machine learning (ML) to accelerate experimental procedures, have enormous potential in the discovery of new materials. However, in thin film science, SDLs are mainly restricted to…

Machine Learning · Computer Science 2026-01-12 Sanna Jarl , Jens Sjölund , Robert J. W. Frost , Anders Holst , Jonathan J. S. Scragg

Gallium oxide is an ultra-wide bandgap semiconductor with excellent opto-electronic properties, making it a highly promising material for a wide range of applications and devices. In this article, we report how the optical, morphological,…

Electrolyte gating is a powerful technique for accumulating large carrier densities in surface two-dimensional electron systems (2DES). Yet this approach suffers from significant sources of disorder: electrochemical reactions can damage or…

Inverse Heusler alloy Mn2CoAl thin films, known as a spin-gapless semiconductor (SGS), grown by three different methods: ultra-high vacuum magnetron spattering, Ar-ion beam assisted sputtering, and molecular beam epitaxy, are investigated…

Increasing the collection efficiency from solid-state emitters is an important step towards achieving robust single photon sources, as well as optically connecting different nodes of quantum hardware. A metallic substrate may be the most…

Quantum Physics · Physics 2017-04-12 Dale Scerri , Ted S. Santana , Brian D. Gerardot , Erik M. Gauger

The search for a two-dimensional material that simultaneously fulfills some properties for its use in spintronics and optoelectronics, i.e., a suitable bandgap with high in-plane carrier mobility and good environmental stability, is the…

Materials Science · Physics 2023-10-05 I. Arias-Camacho , A. M León , J. Mejía-Lopez

Alkane chains are the most commonly used molecules for monolayer fabrication. Long chains are used for their strong van der Waals interactions inducing good layer organization. Amine function-terminated alkyl chains are of great interest…

Materials Science · Physics 2020-12-11 Yannick Dufil , Virginie Gadenne , Pascal Carrière , Jean-Michel Nunzi , Lionel Patrone

Conduction band-edge spin-orbit splitting (SOS) in monolayer transition metal dichalcogenides determines a competition between bright and dark excitons and sets conditions for spintronics applications of these semiconductors. Here, we…

Mesoscale and Nanoscale Physics · Physics 2026-02-11 Igor Rozhansky , Michele Masseroni , Ricardo Pisoni , Suad Alshammari , Xue Li , Thomas Ihn , Klaus Ensslin , James McHugh , Vladimir Fal'ko

Two-dimensional materials (2DM) and their derived heterostructures have electrical and optical properties that are widely tunable via several approaches, most notably electrostatic gating and interfacial engineering such as twisting. While…

Mesoscale and Nanoscale Physics · Physics 2024-06-18 Haoning Tang , Yiting Wang , Xueqi Ni , Kenji Watanabe , Takashi Taniguchi , Pablo Jarillo-Herrero , Shanhui Fan , Eric Mazur , Amir Yacoby , Yuan Cao

Tantalum is a promising platform for superconducting quantum circuits, yet coherence times remain limited by dielectric losses from interfacial two-level systems (TLS), exacerbated by native oxide regrowth. Here, we implement molecular…

Revealing hidden non-radiative (dark) of resonant nanostructures using optical methods such as dark-field spectroscopy often becomes a sophisticated problem due to a weak coupling of these modes with a far-field radiation, whereas methods…