Browsing Physics (Scholarly Publications) by Author "Caffrey, David"
Now showing items 1-11 of 11
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Atomic and Electronic Structure of a Multidomain GeTe Crystal
Caffrey, David; Shvets, Igor (2020)Renewed interest in the ferroelectric semiconductor germanium telluride was recently triggered by the direct observation of a giant Rashba effect and a 30-year-old dream about a functional spin field-effect transistor. In ... -
Bending stability of Cu0.4CrO2 - A transparent p-type conducting oxide for large area flexible electronics
Fleischer, Karsten; Shvets, Igor; Caffrey, David; Mullarkey, Daragh; Norton, Emma; Zhussupbekova, A.; Papanastasiou, Dorina T.; Oser, D.; Bellet, D. (2018)The current best performing p-type transparent conducting oxides are typically highly crystalline materials, deposited at high temperatures, and hence incompatible with the drive to low cost flexible electronics. We ... -
Crystallographic Characterisation of Ultra-Thin, or Amorphous Transparent Conducting Oxides ? The Case for Raman Spectroscopy
Shvets, Igor; KAISHA, AITKAZY; ZHUSSUPBEKOVA, AINUR; AINABAYEV, ARDAK; Caffrey, David (2020)The electronic and optical properties of transparent conducting oxides (TCOs) are closely linked to their crystallographic structure on a macroscopic (grain sizes) and microscopic (bond structure) level. With the increasing ... -
Deformation and fracture of crystalline tungsten and fabrication of composite STM probes
Caffrey, David; Shvets, Igor (2020)Fracturing microscale constrictions in metallic wires, such as tungsten, platinum, or platinum-iridium, is a common fabrication method used to produce atomically sharp tips for scanning tunneling microscopy (STM), ... -
Efficient Resistive Switching and Spike Rate Dependent Plasticity in a New CuCrO2 Memristor for Plausible Neuromorphic Systems
Caffrey, David; Shvets, Igor (2020)In this work, we introduce a new class of p-type transparent conductive oxide (TCO) CuCrO2 (150 nm) heterogeneously integrated onto FTO/glass for forming free memristor based neuromorphic applications. The fabricated ... -
The growth of high-crystalline quality M n 2 Au (110) thin films
Caffrey, David; Casey, Daniel (2022)Mn2Au is a bimetallic antiferromagnetic with an extraordinarily high Néel temperature of 1600 K. Mn2Au has also been found to demonstrate Néel-order spin–orbit torque, allowing for electrical switching of the antiferromagnetic ... -
Growth of ZnO:Al by atomic layer deposition: Deconvoluting the contribution of hydrogen interstitials and crystallographic texture on the conductivity
Caffrey, David; Mauit, Ozhet; Ainabayev, Ardak; Kaisha, Aitkazy; Toktarbaiuly, Olzat; Sugurbekov, Yerzhigit; Surgurbekova, Gulnar; Shvets, Igor V.; Fleischer, Karsten (2019)Aluminium doped ZnO (AZO) is an interesting low cost transparent conducting oxide with further use as an inorganic transport layer in multilayer solar cells. Here we present our work on atomic layer deposited (ALD) thin ... -
Low-Cost, High-Performance Spray Pyrolysis-Grown Amorphous Zinc Tin Oxide: The Challenge of a Complex Growth Process
Caffrey, David; Shvets, Igor (2020)Transparent conductive oxides (TCOs) are important materials for a wide range of optoelectronic devices. Amorphous zinc tin oxide (a-ZTO) is a TCO and one of the best nontoxic, low-cost replacements for more expensive ... -
Revealing electromigration on dielectrics and metals through the step-bunching instability
Caffrey, David; Shvets, Igor (2020)Electromigration, due to its technological and scientific significance, has been a subject of extensive studies for many years. We present evidence of electromigration in dielectric materials, namely C-plane sapphire, ... -
Solution-Based Deposition of Transparent Eu-Doped Titanium Oxide Thin Films for Potential Security Labeling and UV Screening
Zhussupbekova, Ainur; Caffrey, David; Shvets, Igor (2020)Transparent titanium oxide thin films attract enormous attention from the scientific community because of their prominent properties, such as low-cost, chemical stability, and optical transparency in the visible region. ... -
Suppression of the metal-insulator transition in magnetron sputtered Ti2O3 films
Caffrey, David; Duesberg, Georg; Shvets, Igor (2020)We report on the synthesis of titanium suboxide films using a magnetron sputtering setup. The structure of the produced films is characterized using Raman spectroscopy and X-ray diffraction and electrical properties are ...