Journal of Physics: Condensed Matter最新文献_第6页

Evolution of a particulate ensemble with fluctuations in particle growth rates. 随粒子生长速率波动的粒子系综的演化。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-04-24 DOI: 10.1088/1361-648X/adcdb1

Eugenya V Makoveeva, Dmitri V Alexandrov

引用次数: 0

Investigating charge transport in ap-Si/n-poly(benzimidazobenzophenanthroline)-BBL thin film heterojunction diode. ap-Si/n-聚（苯并咪唑苯并菲罗啉）-BBL薄膜异质结二极管的电荷输运研究。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-04-24 DOI: 10.1088/1361-648X/adcdb0

Alejandro J Cruz-Arzon, Nicholas J Pinto

{"title":"Investigating charge transport in ap-Si/n-poly(benzimidazobenzophenanthroline)-BBL thin film heterojunction diode.","authors":"Alejandro J Cruz-Arzon, Nicholas J Pinto","doi":"10.1088/1361-648X/adcdb0","DOIUrl":"https://doi.org/10.1088/1361-648X/adcdb0","url":null,"abstract":"The physics of charge transport across the interface in an inorganic Si/organic conducting polymer junction diode has received little attention compared to the inorganicp-nsilicon diode. One reason is the amorphous nature of the organic polymer and the polymer chain orientation which introduces disorder and barriers to charge flow. Herein we first present an easy technique to fabricate an inorganic/organic,p-Si/n-poly(benzimidazobenzophenanthroline-BBL) junction diode. The physics of charge transport across the heterojunction, and in the BBL film is then analyzed from the device current-voltage characteristics as a function of temperature in the range 150 K <T< 370 K. The temperature dependence of the diode ideality parameter and of the saturation current density demonstrate that tunneling enhanced charge recombination via exponential trap distributions in the depletion region was responsible for charge transport across the junction. Furthermore, the temperature dependence of the diode conductance revealed that thermal activation and hopping both contributed to charge transport in the BBL film away from the junction. BBL is a ladder polymer with a discrete layered crystal structure that is oriented perpendicular to the substrate. Such polymer chain orientation, combined with a distribution of bond lengths and numerous conjugation paths available for charge delocalization result in the multiple charge transport mechanisms as observed in the diode.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":"37 20","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143972890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dome-like pressure-temperature phase diagram of the cooperative Jahn-Teller distortion in NaNiO₂. 纳米tio2中协同jhn - teller畸变的圆顶状压力-温度相图。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-04-24 DOI: 10.1088/1361-648X/adcb0e

Liam A V Nagle-Cocco, James M A Steele, Shiyu Deng, Xiaotian Zhang, Dominik Daisenberger, Annalena R Genreith-Schriever, Siddharth S Saxena, Clare P Grey, Siân E Dutton

{"title":"Dome-like pressure-temperature phase diagram of the cooperative Jahn-Teller distortion in NaNiO2.","authors":"Liam A V Nagle-Cocco, James M A Steele, Shiyu Deng, Xiaotian Zhang, Dominik Daisenberger, Annalena R Genreith-Schriever, Siddharth S Saxena, Clare P Grey, Siân E Dutton","doi":"10.1088/1361-648X/adcb0e","DOIUrl":"https://doi.org/10.1088/1361-648X/adcb0e","url":null,"abstract":"NaNiO2is a Ni3+-containing layered material consisting of alternating triangular networks of Ni and Na cations, separated by octahedrally-coordinated O anions. At ambient pressure, it features a collinear Jahn-Teller distortion belowTonsetJT≈480 K, which disappears in a first-order transition on heating toTendJT≈500 K, corresponding to the increase in symmetry from monoclinic to rhombohedral. It was previously studied by variable-pressure neutron diffraction (Nagle-Coccoet al2022ACS Inorg. Chem.614312) and found to exhibit an increasingTonsetJTwith pressure up to ∼5 GPa. In this work, powdered NaNiO2was studied via variable-pressure synchrotron x-ray diffraction up to pressures of ∼67 GPa at 294 K and 403 K. Suppression of the collinear Jahn-Teller ordering is observed via the emergence of a high-symmetry rhombohedral phase, with the onset pressure occurring at ∼18 GPa at both studied temperatures. Further, a discontinuous decrease in unit cell volume is observed on transitioning from the monoclinic to the rhombohedral phase. These results taken together suggest that in the vicinity of the transition, application of pressure causes the Jahn-Teller transition temperature,TonsetJT, to decrease rapidly. We conclude that the pressure-temperature phase diagram of the cooperative Jahn-Teller distortion in NaNiO2is dome-like.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":"37 20","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144000596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Silica-binding peptides: physical chemistry and emerging biomaterials applications. 硅结合肽：物理化学和新兴生物材料的应用。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-04-23 DOI: 10.1088/1361-648X/adc6e2

Wilson A Tárraga, Marilina Cathcarth, Agustin S Picco, Gabriel S Longo

引用次数: 0

Deep chalcogen donors and electron localization in aluminum nitride. 氮化铝的深给体和电子定位。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-04-22 DOI: 10.1088/1361-648X/adcb10

John L Lyons, Joel B Varley

引用次数: 0

Electrical resistivity of ErB₂under pressure. ErB2 在压力下的电阻率。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-04-22 DOI: 10.1088/1361-648X/adc77a

A Tong, D Nuzhina, C Resch, G Benka, A Bauer, C Pfleiderer

引用次数: 0

Exploring the interactions of ZDDP additive with hematite surfaces: a DFT+Ustudy. 探索ZDDP添加剂与赤铁矿表面的相互作用：dft + u研究。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-04-17 DOI: 10.1088/1361-648X/adc5c2

Davide Sarpa, David D O'Regan, Vasilios Bakolas, Joanna Procelewska, Joerg Franke, Philipp Roedel, Marcus Wolf, Chris-Kriton Skylaris

{"title":"Exploring the interactions of ZDDP additive with hematite surfaces: a DFT+Ustudy.","authors":"Davide Sarpa, David D O'Regan, Vasilios Bakolas, Joanna Procelewska, Joerg Franke, Philipp Roedel, Marcus Wolf, Chris-Kriton Skylaris","doi":"10.1088/1361-648X/adc5c2","DOIUrl":"10.1088/1361-648X/adc5c2","url":null,"abstract":"The class of zinc dialkyldithiophosphates (ZDDPs) has been the most widely used anti-wear additive class in the automotive industry for over 60 years, yet the pathway to the generation of the protective tribofilm remains elusive. In this context, density functional theory (DFT) can be utilized to investigate the interactions between ZDDPs and materials surfaces. We employed DFT+Ucalculations to examine the electronic structure of bulk hematite and three relevant (0001) surface terminations: Fe-O-Fe, O-Fe-Fe, and HO-Fe-Fe. Our results demonstrate that, while the Fe-O-Fe and HO-Fe-Fe slabs are insulating, the O-Fe-Fe terminated slab is metallic due to the formation of surface states from O dangling bonds. Additionally, we found that ZDDP binds more strongly on the Fe-O-Fe slab, leading to changes in ZDDP geometry and atomic charges. Minimal changes are observed when bound to the other surfaces. We have provided an in-depth study of the electronic structure of hematite and its surfaces, and their interaction with ZDDP. We include a detailed study of the first-principles Hubbard U and Hund J for Fe 3d orbitals in bulk hematite, finding a negligible self-consistency effect but a significant projector dependence. The new insights from this work provide a new path that can be used to understand the decomposition pathways of ZDDPs on metallic surfaces.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143730563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Regulation of transition temperature and magnetic anisotropy in 2D multiferroic monolayer through electron donating and withdrawing groups adsorption. 二维多铁质单层中供电子和吸电子基团对转变温度和磁各向异性的调控。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-04-17 DOI: 10.1088/1361-648X/adc77b

Chee Kian Yap, Lei Zhang, Aijun Du, Cheng Tang

{"title":"Regulation of transition temperature and magnetic anisotropy in 2D multiferroic monolayer through electron donating and withdrawing groups adsorption.","authors":"Chee Kian Yap, Lei Zhang, Aijun Du, Cheng Tang","doi":"10.1088/1361-648X/adc77b","DOIUrl":"10.1088/1361-648X/adc77b","url":null,"abstract":"The discovery of two-dimensional (2D) magnetic materials ushers in the engineering of future magnetoelectric nanodevices and spintronics, however, it is limited by the lack of a material platform with simultaneously large magnetic anisotropy and high transition temperature. Using a recently synthesized CrSe2monolayer as a demonstration, the impact on magnetism and electronics is studied via first-principles calculations by functionalizing the monolayer with electron-donating and electron-withdrawing groups namely NH2and NO2. The magnetic ground state of the CrSe2changes from the stripe antiferromagnetic to the ferromagnetic state after functionalization. The transition temperature of CrSe2-NO2and CrSe2-NH2enhances to 105 and 70 K, respectively, due to the expansion of the CrSe2superlattice. Besides, the magnetic anisotropy energy (MAE) of the CrSe2-NO2increases to 1.12 meV/Cr along the in-plane direction due to the electron-withdrawing effect of the NO2group. Oppositely, the electron-donating effect will decrease the MAE. Moreover, robust out-of-plane electric polarization is induced into the functionalized CrSe2monolayer, relying on the semiconducting nature and asymmetric geometry along thezdirection. These findings demonstrate the critical role of functional groups in regulating the magnetic and electronic properties of 2D multiferroic structures, providing a general approach for controllable 2D spintronic applications.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143753228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Corrigendum: Quantitative Eliashberg theory of the superconductivity of thin films (2025J. Phys.: Condens. Matter37 065703). 勘误：薄膜超导性的定量Eliashberg理论（2025J）。理论物理。:提供者。Matter37 065703)。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-04-14 DOI: 10.1088/1361-648X/adc965

Giovanni Alberto Ummarino, Alessio Zaccone

引用次数: 0

Spin dynamics in linear magnetoelectric material Mn₃Ta₂O₈. 线性磁电材料Mn3Ta2O8的自旋动力学。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-04-14 DOI: 10.1088/1361-648X/adc964

Hodaka Kikuchi, Shunsuke Hasegawa, Shinichiro Asai, Tao Hong, Kenta Kimura, Tsuyoshi Kimura, Shinichi Itoh, Takatsugu Masuda

引用次数: 0