Materials Today Quantum最新文献_第2页

External manipulation of the spin-orbit torque and magnetization switching in gradient CoPd single layer via hydrogen 通过氢对梯度 CoPd 单层中的自旋轨道力矩和磁化切换进行外部操纵

Materials Today Quantum Pub Date : 2024-07-03 DOI: 10.1016/j.mtquan.2024.100008

Zehan Chen , Xiaoguang Li , Lin Liu , Tao Lin , Jiai Ning , Hui Yang , Shunpu Li , Hongyu An

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引用次数: 0

Variational quantum circuit-based quantum machine learning approach for predicting corrosion inhibition efficiency of pyridine-quinoline compounds 基于变量量子电路的量子机器学习方法用于预测吡啶-喹啉化合物的缓蚀效率

Materials Today Quantum Pub Date : 2024-04-16 DOI: 10.1016/j.mtquan.2024.100007

Muhamad Akrom , Supriadi Rustad , Hermawan Kresno Dipojono

{"title":"Variational quantum circuit-based quantum machine learning approach for predicting corrosion inhibition efficiency of pyridine-quinoline compounds","authors":"Muhamad Akrom , Supriadi Rustad , Hermawan Kresno Dipojono","doi":"10.1016/j.mtquan.2024.100007","DOIUrl":"https://doi.org/10.1016/j.mtquan.2024.100007","url":null,"abstract":"<div>This work used a variational quantum circuit (VQC) in conjunction with a quantitative structure-property relationship (QSPR) model to completely investigate the corrosion inhibition efficiency (CIE) displayed by pyridine-quinoline compounds acting as corrosion inhibitors. Compared to conventional methods like multilayer perceptron neural networks (MLPNN), the VQC model predicts the CIE more accurately. With a coefficient of determination (R2), root mean square error (RMSE), mean absolute error (MAE), and mean absolute deviation (MAD) values of 0.989, 0.027, 0.024, and 0.019, respectively, VQC performs better. The established VQC model predicts the CIE with outstanding predictive accuracy for four newly synthesized pyrimidine derivative compounds: 1-(4-fluorophenyl)- 3-(4-(pyridin-4-ylmethyl)phenyl)urea (P1), 1-phenyl-3-(4-(pyridin-4-ylmethyl)phenyl)urea (P2), 1-(4-methylphenyl)-3-(4-(pyridin-4-ylmethyl)phenyl)urea (P3), and quaternary ammonium salt dimer (P4). It generates remarkably high CIE values of 92.87, 94.05, 94.96, and 96.93 for P1, P2, P3, and P4, respectively. With its ability to streamline the testing and production processes for novel anti-corrosion materials, this innovative approach holds the potential to revolutionize the market.</div>","PeriodicalId":100894,"journal":{"name":"Materials Today Quantum","volume":"2 ","pages":"Article 100007"},"PeriodicalIF":0.0,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950257824000076/pdfft?md5=7241feb2d43701adfafaece20d0bfc21&pid=1-s2.0-S2950257824000076-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140557365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Skyrmion lattice in centrosymmetric magnets with local Dzyaloshinsky–Moriya interaction 具有局部 Dzyaloshinsky-Moriya 相互作用的中心对称磁体中的 Skyrmion 晶格

Materials Today Quantum Pub Date : 2024-04-06 DOI: 10.1016/j.mtquan.2024.100006

Shi-Zeng Lin

引用次数: 0

Universal quantum computing based on magnetic domain-wall qubits 基于磁畴壁量子比特的通用量子计算

Materials Today Quantum Pub Date : 2024-04-04 DOI: 10.1016/j.mtquan.2024.100005

Shuang Li , Xichao Zhang , Motohiko Ezawa , Yan Zhou

{"title":"Universal quantum computing based on magnetic domain-wall qubits","authors":"Shuang Li , Xichao Zhang , Motohiko Ezawa , Yan Zhou","doi":"10.1016/j.mtquan.2024.100005","DOIUrl":"https://doi.org/10.1016/j.mtquan.2024.100005","url":null,"abstract":"<div>Quantum computers allow to solve efficiently certain problems that are intractable for classical computers. For the realization of a quantum computer, a qubit design as the basic building block is a nontrivial starting point. Within a nanoscale ferromagnetic domain wall stabilized by achiral energy, two degenerate chirality forms exist which can be regarded as the two qubit states. Our numerical demonstration shows that the manipulation of spin configurations of the ferromagnetic domain walls is governed by magnetic and electric fields for single-qubit quantum gates, while the Ising exchange coupling facilitates the two-qubit gates. The incorporation of these quantum gates permits universal quantum computation. Furthermore, we discuss the estimation of the coherence time, as well as the initialization and readout of the qubits. Our findings show a practical implementation of quantum computing architectures based on the domain-wall qubits in ferromagnetic materials.</div>","PeriodicalId":100894,"journal":{"name":"Materials Today Quantum","volume":"2 ","pages":"Article 100005"},"PeriodicalIF":0.0,"publicationDate":"2024-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950257824000052/pdfft?md5=93163fa12802bb73447d892b0f582e07&pid=1-s2.0-S2950257824000052-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140554864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The dawn of the quantum materials age – Introducing Materials Today Quantum 量子材料时代的来临 - 《今日材料》量子材料介绍

Materials Today Quantum Pub Date : 2024-03-01 DOI: 10.1016/j.mtquan.2024.100003

Jing Xia

引用次数: 0

Micron-scale FETs of fully epitaxial perovskite oxides using chemical etching 利用化学蚀刻技术实现全外延包晶氧化物的微米级场效应晶体管

Materials Today Quantum Pub Date : 2024-01-26 DOI: 10.1016/j.mtquan.2024.100002

Jaehyeok Lee, Juhan Kim, Jongkyoung Ko, Kookrin Char

{"title":"Micron-scale FETs of fully epitaxial perovskite oxides using chemical etching","authors":"Jaehyeok Lee, Juhan Kim, Jongkyoung Ko, Kookrin Char","doi":"10.1016/j.mtquan.2024.100002","DOIUrl":"10.1016/j.mtquan.2024.100002","url":null,"abstract":"<div>Advent of high mobility perovskite oxide semiconductor BaSnO3 (BSO) has enabled all-perovskite oxide heterostructures such as 2DEGs and FETs. To date all-perovskite oxide device demonstrations have been focused on finding and integrating the compatible perovskite dielectric oxides such as polar LaInO3 and LaScO3 and non-polar BaHfO3 and SrHfO3. For these demonstrations the length scale of BSO-based heterostructure devices has been about 100 µm, primarily due to the use of stencil masks for patterning. In order to further reduce the length scale, we employed a top-down approach using both photolithography and chemical etching techniques to pattern FETs made entirely of perovskite oxide materials: Ba0.997La0.003SnO3 channel layer, degenerately doped Ba0.96La0.04SnO3 contact layer, and SrHfO3 gate oxide layer. FETs of 3 µm channel length were fabricated using hydrofluoric acid and aqua regia as etchants. The FET exhibits a mobility of 38.8 cm²/Vs, an on/off ratio of 5.06 × 107, and a drain current density of 6.05 × 10−2 mA/μm, consistent with our expectation. These findings demonstrate the feasibility of patterning BSO through photolithography and chemical etching while maintaining the subsequent epitaxial growth, suggesting that BSO can be employed in a broader range of applications as well as for more precise studies of its intrinsic properties.</div>","PeriodicalId":100894,"journal":{"name":"Materials Today Quantum","volume":"1 ","pages":"Article 100002"},"PeriodicalIF":0.0,"publicationDate":"2024-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950257824000027/pdfft?md5=36e35cb0410eea2738483ff45377d6e7&pid=1-s2.0-S2950257824000027-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139632927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring the electronic potential of effective tight-binding hamiltonians 探索有效紧密结合哈密顿电子势能

Materials Today Quantum Pub Date : 2024-01-15 DOI: 10.1016/j.mtquan.2024.100001

Graziâni Candiotto

{"title":"Exploring the electronic potential of effective tight-binding hamiltonians","authors":"Graziâni Candiotto","doi":"10.1016/j.mtquan.2024.100001","DOIUrl":"https://doi.org/10.1016/j.mtquan.2024.100001","url":null,"abstract":"<div>The linear combination of atomic orbitals (LCAO) is a standard method for studying solids and molecules, it is also known as the tight-binding (TB) method. In most of the implementations only the basis set and the coupling constants are provided, without the explicit definition of kinetic and potential energy operators. The tight-binding scheme is, nonetheless, capable of providing an accurate description of properties such as the electronic bands and elastic constants for many materials. However, for some applications, the knowledge of the underlying electronic potential associated with the tight-binding hamiltonian might be important to guarantee that the actual physics is preserved by the semiempirical scheme. In this work the electronic potentials that arise from the use of tight-binding effective hamiltonians it is explored. The formalism is applied to the extended Hückel tight-binding (EHTB) hamiltonian, which is a two-center Slater<math><mo>−</mo></math>Koster approach that makes explicit use of the overlap matrix.</div>","PeriodicalId":100894,"journal":{"name":"Materials Today Quantum","volume":"1 ","pages":"Article 100001"},"PeriodicalIF":0.0,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950257824000015/pdfft?md5=ded5fdd530e687c87e9d3fc07e5c3751&pid=1-s2.0-S2950257824000015-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139487570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0