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Coatings
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Application of Coatings and Low-Dimensional Systems in Quantum Devices
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Application of Coatings and Low-Dimensional Systems in Quantum Devices

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Surface Engineering for Energy Harvesting, Conversion, and Storage".

Deadline for manuscript submissions: closed (31 December 2023) | Viewed by 5356

Special Issue Editor

Prof. Dr. Feng Chi

E-Mail Website
Guest Editor
School of Electronic and Information Engineering, University of Electronic Science and Technology (UEST), Zhongshan Institute, Zhongshan 528400, China
Interests: thin film; device preparation; driving system; system integration; device simulation

Special Issue Information

Dear Colleagues,

Electro-optical devices are functional devices which can combine optical and electronical technologies, and thin films and coatings are important components of electro-optical devices. They are widely used in the fields of communications, electro-optical conversion, sensors and displays. With the development of technology in the 21st century, the market demand for electro-optical devices has greatly increased. High-performance electro-optical devices are required in many fields. The study of new coatings and thin films can increase the level of performance and number of application scenarios of optoelectronic devices. This Special Issue aims to collect the latest developments in electro-optical devices, with special emphasis on their simulation, structure and application. We would like to invite you to submit your work to this Special Issue on "Application of Coatings and Thin Films in Electro-Optical Devices".

In particular, the main contents of this topic include, but are not limited to, the following:

  • The preparation of coatings in electro-optical devices;
  • New coating and film structures;
  • The physical simulation of coatings and films;
  • New applications of coatings and films in electro-optical devices;
  • New processes of coating preparation in electro-optical devices;
  • New principle devices composed of coatings and thin films;
  • Driving methods of coating or thin film devices;
  • New coatings and new film products.

Prof. Dr. Feng Chi
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Coatings is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • electro-optical devices
  • thin films
  • coatings
  • physical simulation
  • driving methods

Published Papers (5 papers)

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Research

12 pages, 452 KiB  
Article
Tunable Josephson Current through a Semiconductor Quantum Dot Hybridized to Majorana Trijunction
by Yumei Gao and Xiaoyan Zhang
Coatings 2023, 13(9), 1627; https://doi.org/10.3390/coatings13091627 - 17 Sep 2023
Viewed by 801
Abstract
We investigate theoretically the Josephson current through one semiconductor quantum dot (QD) coupled to triple nanowires (junctions) with Majorana bound states (MBSs) prepared at their ends. We find that not only the strength but also the period of the Josephson current flowing between [...] Read more.
We investigate theoretically the Josephson current through one semiconductor quantum dot (QD) coupled to triple nanowires (junctions) with Majorana bound states (MBSs) prepared at their ends. We find that not only the strength but also the period of the Josephson current flowing between the left and right Josephson junctions via the dot can be fully controlled in terms of the third junction side-coupled to the QD. When the phase factor is zero in the third junction, which acts as a current regulator, the Josephson current is a 2π-period function of the difference in phases of the left and right junctions. Now, the magnitude of the current is suppressed by hybridization between the QD and the regulator junction. The period of the current becomes 4π under the condition of nonzero phase factor in the regular junction, and thus either the magnitude or the sign (flow direction) of the current can be controlled in this trijunction device. This is difficult to realize in the usual tow-terminal structure. It is also found that the direct overlap between the MBSs in the regulator junction generally enhances the current’s amplitude, but those in the left and right Majorana junctions suppress the current. The above results are explained with the help of the device’s energy diagram and the current carrying density of states (CCDOS) and might be applied for adjusting the current density in the superconducting coated conductors technologies. Full article
(This article belongs to the Special Issue Application of Coatings and Low-Dimensional Systems in Quantum Devices)
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14 pages, 6071 KiB  
Article
A Driving Waveform with a Narrow Falling and High-Voltage Reset Structure for Improving the Stability of Electrowetting Displays
by Zhengxing Long, Zichuan Yi, Jiashuai Wang, Liming Liu, Feng Chi, Lingling Shui, Ding Tan and Huan Wang
Coatings 2023, 13(5), 935; https://doi.org/10.3390/coatings13050935 - 16 May 2023
Cited by 1 | Viewed by 990
Abstract
An electrowetting display (EWD) is a new reflective display device with the advantages of paper display, high reflectivity, and fast response times. However, the display performance of EWDs has been restricted by oil film splitting and luminance oscillation. Therefore, a new driving waveform [...] Read more.
An electrowetting display (EWD) is a new reflective display device with the advantages of paper display, high reflectivity, and fast response times. However, the display performance of EWDs has been restricted by oil film splitting and luminance oscillation. Therefore, a new driving waveform based on a falling slope function and a high-voltage, square-wave reset signal is proposed to solve these defects. It consists of a shrinkage stage and a stabilizing stage. First, the oil film of a pixel can be quickly ruptured by applying a falling slope function during the shrinkage stage according to the oil film-splitting theory. Then, a direct current (DC) voltage is applied to promote the complete fusion of the dispersed oil films by analyzing the voltage characteristic curves of EWDs. Finally, a high-voltage, square-wave reset signal is applied during the stabilizing stage to reduce luminance oscillations and suppress oil film backflow. Experimental results show that the average luminance was increased by 6.5% compared with a PWM driving waveform. The display stability of EWDs was improved by 89.1% compared with a driving waveform with a rising gradient. Full article
(This article belongs to the Special Issue Application of Coatings and Low-Dimensional Systems in Quantum Devices)
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11 pages, 755 KiB  
Article
Josephson dc Current through T-Shaped Double-Quantum-Dots Hybridized to Majorana Nanowires
by Hairui Zhang, Lianliang Sun and Jia Liu
Coatings 2023, 13(3), 523; https://doi.org/10.3390/coatings13030523 - 27 Feb 2023
Cited by 2 | Viewed by 1066
Abstract
We study quantum interference effects on Josephson current in T-shaped double quantum dots (TDQDs) with one of them (the central dot) is sandwiched between the left and right topological superconductor nanowires hosting Majorana bound states (MBSs). We find that the current’s magnitude is [...] Read more.
We study quantum interference effects on Josephson current in T-shaped double quantum dots (TDQDs) with one of them (the central dot) is sandwiched between the left and right topological superconductor nanowires hosting Majorana bound states (MBSs). We find that the current’s magnitude is suppressed by the inter-dot coupling that induces the quantum interference effect, with unchanged jump in the current at particular phase difference between the two nanowires from which the Josephson effect arises. The current remains as a sinusoidal function with respective to the phase difference in the presence of quantum interference effect, but with significant reduction. The central broad peak in the curve of the Josephson current versus the QDs’ levels are split in different ways depending on the configurations of the latter. We also find that the impacts of the non-z-axial direction magnetic field, bending angle between the two nanowires and the direct hybridization amplitude between the MBSs on the current all depend on the arrangement of the QDs’ energy levels. Full article
(This article belongs to the Special Issue Application of Coatings and Low-Dimensional Systems in Quantum Devices)
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13 pages, 3445 KiB  
Article
Asymmetrical Gaussian Potential Effects on Strongly Coupled Magnetopolaron Properties in Triangular Confinement Potential Quantum Wells
by Jun Ge, Shuang Han, Xiujuan Miao, Yong Sun and Jinglin Xiao
Coatings 2022, 12(12), 1900; https://doi.org/10.3390/coatings12121900 - 5 Dec 2022
Cited by 1 | Viewed by 877
Abstract
In this research, the existence of an asymmetrical Gaussian confinement potential (AGCP) along the quantum well (QW) growth direction and of a parabolic potential perpendicular to the polar coordinate direction were considered. The magnetic field and temperature properties of the longitudinal optical (LO)-phonon [...] Read more.
In this research, the existence of an asymmetrical Gaussian confinement potential (AGCP) along the quantum well (QW) growth direction and of a parabolic potential perpendicular to the polar coordinate direction were considered. The magnetic field and temperature properties of the longitudinal optical (LO)-phonon mean number, ground-state energy (GSE), ground-state binding energy (GSBE) and vibrational frequency (VF) of strongly coupled magnetopolarons in triangular confinement potential QWs (TCPQWs) were investigated according to the quantum statistical theory as well as the linear combination operator and unitary transformation methods. We obtained analytical expressions for the GSE, GSBE, VF and LO-phonon mean number as functions of the applied magnetic field, temperature, AGCP barrier height, AGCP range, polar coordinate system’s polar angle and polar coordinate system’s confinement strength. It was demonstrated by the calculated numerical results that the GSE, GSBE, VF and LO-phonon mean number varied with the related physical quantities. The obtained theoretical results are expected to provide a reference for future research on polarons. Full article
(This article belongs to the Special Issue Application of Coatings and Low-Dimensional Systems in Quantum Devices)
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8 pages, 2747 KiB  
Article
The Impurity and Decay-Magnetic Polaron Effects in III–V Compound Gaussian Quantum Wells
by Xin Zhang, Wei Zhang, Xin-Jun Ma, Pei-Fang Li, Yong Sun and Jing-Lin Xiao
Coatings 2022, 12(8), 1072; https://doi.org/10.3390/coatings12081072 - 29 Jul 2022
Viewed by 953
Abstract
The effects of a decay magnetic field and hydrogen-like impurities on the ground-state binding energy (GSBE) and ground-state energy (GSE) of weak-coupling bound polarons in asymmetrical Gaussian potential (AGP) III–V compound quantum wells (QWs) were studied based on unitary transformation methods and linear [...] Read more.
The effects of a decay magnetic field and hydrogen-like impurities on the ground-state binding energy (GSBE) and ground-state energy (GSE) of weak-coupling bound polarons in asymmetrical Gaussian potential (AGP) III–V compound quantum wells (QWs) were studied based on unitary transformation methods and linear combination operators. By numerical calculation, we found that the polarons were affected by the AGP, the decay magnetic field, Coulomb impurities, and the type of crystal, which led to a series of interesting phenomena, such as changes in the ground-state energy and the ground-state binding energy. The results obtained provide good theoretical guidance for optoelectronic devices and quantum information. Full article
(This article belongs to the Special Issue Application of Coatings and Low-Dimensional Systems in Quantum Devices)
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