physica status solidi (RRL) – Rapid Research Letters最新文献_第5页

Wavefronts Dislocations of Friedel Oscillations in Graphene: Trigonal Warping Effect 石墨烯中弗里德尔振荡的波面位错：三边翘曲效应

physica status solidi (RRL) – Rapid Research Letters Pub Date : 2023-12-16 DOI: 10.1002/pssr.202300378

Jin Yang, Shu-Hui Zhang, Wen Yang

{"title":"Wavefronts Dislocations of Friedel Oscillations in Graphene: Trigonal Warping Effect","authors":"Jin Yang, Shu-Hui Zhang, Wen Yang","doi":"10.1002/pssr.202300378","DOIUrl":"https://doi.org/10.1002/pssr.202300378","url":null,"abstract":"The electron waves of a host system exhibit an oscillating response to an external impurity, namely Friedel oscillations, extensively studied in two‐dimensional materials. Recently, wavefront dislocations, a new feature of Friedel oscillations, have been revealed in graphene. However, previous analytical works have been limited to the linear dispersion of graphene. In this study, the fate of wavefront dislocations is investigated numerically in Friedel oscillations beyond the linear regime. The wavefront dislocations are robust against the trigonal warping effect, crucial for high doping graphene, due to the invariant winding number of the tight‐binding energy band. Furthermore, the opening of the gap, increasing the electronic Fermi wavelength, can highlight the wavefront dislocations blurred by intravalley scattering induced short‐range oscillations. These results should be observable using current experimental technology. Therefore, this study not only demonstrates the robust existence of wavefront dislocations in Friedel oscillations over a wide range of energies but also deepens the understanding of intervalley scattering in graphene and other two‐dimensional valleytronic materials.This article is protected by copyright. All rights reserved.","PeriodicalId":20059,"journal":{"name":"physica status solidi (RRL) – Rapid Research Letters","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138967221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydrogen iodide energy cycle to repeat solar hydrogen generation and battery power generation using single‐walled carbon nanotubes 利用单壁碳纳米管重复太阳能制氢和电池发电的碘化氢能源循环

physica status solidi (RRL) – Rapid Research Letters Pub Date : 2023-09-04 DOI: 10.1002/pssr.202300236

Y. Ishii, Midori Umakoshi, Kenta Kobayashi, Runa Kato, A. Al-Zubaidi, Shinji Kawasaki

{"title":"Hydrogen iodide energy cycle to repeat solar hydrogen generation and battery power generation using single‐walled carbon nanotubes","authors":"Y. Ishii, Midori Umakoshi, Kenta Kobayashi, Runa Kato, A. Al-Zubaidi, Shinji Kawasaki","doi":"10.1002/pssr.202300236","DOIUrl":"https://doi.org/10.1002/pssr.202300236","url":null,"abstract":"We propose a new energy cycle called the “HI cycle” that involves the repeated generation of solar hydrogen and battery power. Solar hydrogen generation using an HI solution allows for the use of a narrower band gap photocatalyst compared to water. We demonstrated that the addition of single‐walled carbon nanotubes (SWCNTs) effectively enhances solar hydrogen generation from an HI solution with methylammonium lead iodide (MAPbI3). Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) observations, along with energy‐dispersive X‐ray spectroscopy (EDS) analysis and Raman measurements, revealed that SWCNTs improve hydrogen generation by adsorbing by‐product iodine molecules. We also fabricated a zinc‐iodine battery using the paper form of I@SWCNTs recovered from the photocatalyst test cell and zinc metal. We demonstrated that the battery efficiently operated with an initial cell voltage of approximately 1.2 V. The battery’s capacity, corresponding to the amount of encapsulated iodine molecules, indicated that SWCNTs can effectively adsorb the by‐product iodine molecules within the photocatalyst test cell. We also discussed that the electrolyte solution after the discharge experiment should include not only iodide ions but also a significant amount of hydrogen ions, indicating that the solution after battery discharge returns to the starting point of the “HI cycle.” Raman measurements revealed that I@SWCNTs, formed during the solar hydrogen generation experiment, were transformed back into empty tubes during the discharge experiment. Therefore, SWCNTs can be repeatedly used in the new cyclic energy scheme referred to as the “HI cycle.”This article is protected by copyright. All rights reserved.","PeriodicalId":20059,"journal":{"name":"physica status solidi (RRL) – Rapid Research Letters","volume":"65 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91126352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bandgap and photoluminescence tunability of lead‐free Cs3Bi2(Br,I)9 solid solution compounds 无铅Cs3Bi2(Br,I)9固溶体化合物的带隙和光致发光可调性

physica status solidi (RRL) – Rapid Research Letters Pub Date : 2023-09-04 DOI: 10.1002/pssr.202300241

Haruto Hashimoto, Ryohei Oka, Tomokatsu Hayakawa, Christoph Brabec

{"title":"Bandgap and photoluminescence tunability of lead‐free Cs3Bi2(Br,I)9 solid solution compounds","authors":"Haruto Hashimoto, Ryohei Oka, Tomokatsu Hayakawa, Christoph Brabec","doi":"10.1002/pssr.202300241","DOIUrl":"https://doi.org/10.1002/pssr.202300241","url":null,"abstract":"In this study, lead‐free, mixed‐halide perovskites of cesium bismuth bromide/iodide are synthesized by a hydrothermal method, and their structures and optical properties of the solid solution compounds are examined. The synthesized compounds exhibit X‐ray diffraction (XRD) patterns similar to that of trigonal Cs3Bi2Br9 (CBB), whose reflections are shifted to lower angles depending on the experimental iodine content. Very interestingly, even with the excessive introduction of iodine content in nominal, the symmetry of the crystals is kept to be trigonal, indicating that bromide CBB and iodide Cs3Bi2I9 (CBI) are crystallographically mixed in a facile way, although the stable crystal form of CBI is hexagonal. The optical properties of bandgap energy E\u0000g\u0000 and photoluminescence (PL) for the synthesized crystals are also examined. It is found that E\u0000g\u0000 decreases and PL peak position is correspondingly shifted to a longer wavelength with an increase in the experimental iodine content due to their band‐to‐band transitions. Moreover, first‐principles calculation suggests the reduction of E\u0000g\u0000 with iodine content and the varied nature of band structure from direct (trigonal CBB) to indirect (trigonal CBI) transition. These novel findings could make the proposed strategy successful for developing lead‐free, mixed‐halide Bi‐based perovskite crystals with the tunability of their optical properties.This article is protected by copyright. All rights reserved.","PeriodicalId":20059,"journal":{"name":"physica status solidi (RRL) – Rapid Research Letters","volume":"88 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81958117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Photoluminescence Color Prediction for Eu3+‐doped Perovskite Red Phosphors using Machine Learning 利用机器学习预测Eu3+掺杂钙钛矿红色荧光粉的光致发光颜色

physica status solidi (RRL) – Rapid Research Letters Pub Date : 2023-09-04 DOI: 10.1002/pssr.202300237

T. Otsuka, Ryohei Oka, Masayuki Karasuyama, Tomokatsu Hayakawa

{"title":"Photoluminescence Color Prediction for Eu3+‐doped Perovskite Red Phosphors using Machine Learning","authors":"T. Otsuka, Ryohei Oka, Masayuki Karasuyama, Tomokatsu Hayakawa","doi":"10.1002/pssr.202300237","DOIUrl":"https://doi.org/10.1002/pssr.202300237","url":null,"abstract":"Currently, data‐driven approaches for exploring novel materials are garnering significant attention with the expectation of accelerating material development cycles and understanding materials from various aspects. This short article presents a supervised prediction model for the emission intensity ratio of 5D0–7F2 and 5D0–7F1 transition of Eu3+ ions, called an “asymmetry ratio,” which determines the color purity of the red region of Eu3+ photoluminescence in perovskite phosphors. The model is developed using a dataset of 296 samples and 203 descriptors for Eu3+‐doped perovskite. The accuracy of the prediction model trained by the dataset is statistically evaluated, which validates its sufficiently high prediction performance. Furthermore, the prediction model’s performance is properly assessed by synthesizing a Eu3+‐doped NaLaInNbO6 compound, which is unknown as a red phosphor, and by comparing the experimental asymmetry ratio for this compound with that predicted by the predictor, which exhibits a satisfactory agreement.This article is protected by copyright. All rights reserved.","PeriodicalId":20059,"journal":{"name":"physica status solidi (RRL) – Rapid Research Letters","volume":"58 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74956999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

TeO2: A prospective high‐k dielectric TeO2:一种潜在的高k介电介质

physica status solidi (RRL) – Rapid Research Letters Pub Date : 2023-09-04 DOI: 10.1002/pssr.202300271

Keerthana, A. Venimadhav

引用次数: 0

Electric‐field‐tunable bipolar linear magnetoelectric effect in zigzag graphene nanoribbon‐based antiferromagnet 基于之字形石墨烯纳米带的反铁磁体中电场可调双极线性磁电效应

physica status solidi (RRL) – Rapid Research Letters Pub Date : 2023-08-30 DOI: 10.1002/pssr.202300228

W. Xie, Zhenzhen Qin, Yu Song, Bin Shao, Xu Zuo

{"title":"Electric‐field‐tunable bipolar linear magnetoelectric effect in zigzag graphene nanoribbon‐based antiferromagnet","authors":"W. Xie, Zhenzhen Qin, Yu Song, Bin Shao, Xu Zuo","doi":"10.1002/pssr.202300228","DOIUrl":"https://doi.org/10.1002/pssr.202300228","url":null,"abstract":"Modern electronic devices are moving toward miniaturization and integration. Therefore, achieving electrical control of magnetization effectively in one‐dimensional materials represents a promising field for the practical applications in memory elements. In this study, it is discovered, from first‐principles calculations, that an electric‐field‐tunable bipolar linear magnetoelectric effect can be realized in one‐dimensional antiferromagnet based on double‐Gd‐adsorbed graphene nanoribbon with four zigzag carbon chains (2Gd‐4ZGNR). We find that, compared with the bare 4ZGNR, the adsorption of two Gd atoms on the 4ZGNR reduces the bandgap. As a result, 2Gd‐4ZGNR transits from antiferromagnetic semiconductor to ferrimagnetic metal at a relatively low critical external transverse (perpendicular) electric field, where the net magnetic moment can be induced. The antiferromagnetism and inversion‐symmetrical crystal structure further allow to realize a bipolar linear magnetoelectric effect, where the 2Gd‐4ZGNR form two groups of independent linear magnetic response states, acting as a magnetoelectric memory element.This article is protected by copyright. All rights reserved.","PeriodicalId":20059,"journal":{"name":"physica status solidi (RRL) – Rapid Research Letters","volume":"21 4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87037107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Iridium/Silicon Ultrathin Film for Ultraviolet Photodetection: Harnessing Hot Plasmonic Effects 用于紫外光探测的铱/硅超薄膜:利用热等离子体效应

physica status solidi (RRL) – Rapid Research Letters Pub Date : 2023-08-29 DOI: 10.1002/pssr.202300257

Mohamed A. Basyooni, M. Tihtih, I. Boukhoubza, J. F. Ibrahim, R. En-nadir, Ahmed M. Abdelbar, Khalid Rahmani, Shrouk E. Zaki, Ş. Ateş, Yasin Ramazan Eker

{"title":"Iridium/Silicon Ultrathin Film for Ultraviolet Photodetection: Harnessing Hot Plasmonic Effects","authors":"Mohamed A. Basyooni, M. Tihtih, I. Boukhoubza, J. F. Ibrahim, R. En-nadir, Ahmed M. Abdelbar, Khalid Rahmani, Shrouk E. Zaki, Ş. Ateş, Yasin Ramazan Eker","doi":"10.1002/pssr.202300257","DOIUrl":"https://doi.org/10.1002/pssr.202300257","url":null,"abstract":"The phenomenon of hot carriers, which are generated through the nonradiative decay of surface plasmons in ultrathin metallic films, offers an intriguing opportunity for sub‐bandgap photodetection even at room temperature. These hot carriers possess sufficient energy to inject into the conduction band of a semiconductor material. The groundbreaking use of Iridium (Ir) ultrathin film as an ultraviolet (UV) plasmonic material on silicon (Si) for high‐performance photodetectors (PHDs) has been successfully demonstrated. Elevating the thickness of the sputtered Ir film to 4 nm yielded a notable surge in photocurrent, registering an impressive 600 µA under 365 nm UV illumination with electron mobility of 1.37E3 cm²/V·s. This PHD exhibited excellent OFF‐ON Photoresponses at various applied voltages ranging from 0 V to 5 V, maintaining a stable photocurrent. Under UV illumination, it displayed exceptional performance, achieving a high detectivity of 1.25E14 Jones and a responsivity of 1.28 A/W. These outstanding results underscore the significant advantages of increasing the thickness of the Ir film in PHDs, leading to improvements in conductivity, detectivity, external quantum efficiency, responsivity, as well as superior sensitivity for light detection.This article is protected by copyright. All rights reserved.","PeriodicalId":20059,"journal":{"name":"physica status solidi (RRL) – Rapid Research Letters","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85436043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Locally reconfigurable exchange bias for tunable spintronics by pulsed current injection 脉冲电流注入可调谐自旋电子学的局部可重构交换偏置

physica status solidi (RRL) – Rapid Research Letters Pub Date : 2023-08-29 DOI: 10.1002/pssr.202300303

Wenli Wang, Yicheng Chen, Bo Wang, Lisong Wang, Yongliang Han, W. Su, Zhongqiang Hu, Zhiguang Wang, Meilin Liu

引用次数: 0

physica status solidi (RRL) – Rapid Research Letters Pub Date : 2023-08-29 DOI: 10.1002/pssr.202300277

N. S. Kurochkin, V. Sychev, A. V. Gritsienko, D. Bi

{"title":"Nickel‐related centers in HPHT microdiamonds for near‐infrared luminescent thermometry","authors":"N. S. Kurochkin, V. Sychev, A. V. Gritsienko, D. Bi","doi":"10.1002/pssr.202300277","DOIUrl":"https://doi.org/10.1002/pssr.202300277","url":null,"abstract":"Nano‐ and microcrystals of diamond are attractive for optical thermometry applications and possess unique optical properties as well as high chemical stability and biocompatibility. For biological application there are interest of diamonds with color centers that emit in the biological transparency window. One such defect is nickel‐related color centers that radiate in the near‐infrared range (1.4‐eV Ni centers), but have not yet been sufficiently investigated. This study reports the optical characteristics of HPHT diamond microcrystals with average sizes of 4 μm and 30 μm containing 1.4‐eV Ni centers. The temperature dependence of the spectral and temporal properties of Ni center emissions in the range from room temperature to 85 °C was demonstrated and thereby the possibility of appliance these centers as temperature sensors. The relative temperature sensitivities of luminescence peak intensity and lifetime for Ni centers were found to be 1.3% K−1 and 0.42% K−1, respectively. Moreover, the temperature determination accuracy reached better than 1 K.This article is protected by copyright. All rights reserved.","PeriodicalId":20059,"journal":{"name":"physica status solidi (RRL) – Rapid Research Letters","volume":"102 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83750034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Doping modification of Cs3Bi2I9 single crystals for high performance X‐ray detectors 用于高性能X射线探测器的Cs3Bi2I9单晶掺杂改性

physica status solidi (RRL) – Rapid Research Letters Pub Date : 2023-08-25 DOI: 10.1002/pssr.202300306

Anfeng Li, Manman Yang, Aoxi He, Peng Tang, X. Hao, Lili Wu, Wenbo Tian, Dingyu Yang, Jingquan Zhang

{"title":"Doping modification of Cs3Bi2I9 single crystals for high performance X‐ray detectors","authors":"Anfeng Li, Manman Yang, Aoxi He, Peng Tang, X. Hao, Lili Wu, Wenbo Tian, Dingyu Yang, Jingquan Zhang","doi":"10.1002/pssr.202300306","DOIUrl":"https://doi.org/10.1002/pssr.202300306","url":null,"abstract":"Cs3Bi2I9 (CBI) is a promising material for direct X‐ray detectors. However, for the solution method, due to the difference in the chemical potential of Cs+, Bi3+, I‐ ions in the solvent, the composition of Cs3Bi2I9 single crystals (SC) prepared by the solution method often deviates from the stoichiometric ratio, resulting in the formation of many defects in the material, which degrades the quality of the SC. In this work, Br‐ and Cl‐ were used as dopants to produce CBI SCs by the top seed solution method. It can be speculated that the dopant ions could reduce the VI defects in the CBI by means of density functional theory (DFT) calculations. The carrier lifetimes of CBI SCs doped with Br‐ and Cl‐ have been increased to 41.7 ns and 13.0 ns, respectively. Meanwhile, the defect densities of the SCs were reduced to 1.02×109 cm‐3 and 1.85×109 cm‐3, respectively. X‐ray detectors based on Br‐doped CBI and Cl‐doped CBI SCs exhibited high X‐ray sensitivity of 23071.3 μC Gyair\u0000‐1cm‐2 and 18525.3 μC Gyair\u0000‐1cm‐2 at an electric field of 40 V mm‐1, respectively. In addition, the X‐ray detection limit reaches 1.07 nGyairs‐1 and 1.35 nGyairs‐1 at an electric field of 2.5 V mm‐1, respectively.This article is protected by copyright. All rights reserved.","PeriodicalId":20059,"journal":{"name":"physica status solidi (RRL) – Rapid Research Letters","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82401496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0