Solid State Communications最新文献

Contrasting structural stability and phase transition of α- and β-Ag2WO4 under pressure

IF 2.1 4区物理与天体物理

Solid State Communications Pub Date : 2025-03-29 DOI: 10.1016/j.ssc.2025.115940

Zheng Wang , Zilong Zhang , Junbo Wang , Shiquan Feng , Kun Yang , Xuerui Cheng

{"title":"Contrasting structural stability and phase transition of α- and β-Ag2WO4 under pressure","authors":"Zheng Wang , Zilong Zhang , Junbo Wang , Shiquan Feng , Kun Yang , Xuerui Cheng","doi":"10.1016/j.ssc.2025.115940","DOIUrl":"10.1016/j.ssc.2025.115940","url":null,"abstract":"<div><div>Ag2WO4 has attracted wide interest due to its excellent visible light photocatalysis. Besides special property, Ag2WO4 exhibits rich polymorphism and crystallizes in three polymorphs. In the present work, orthorhombic α-Ag2WO4 and hexagonal β-Ag2WO4 were successfully synthesized. Structural stability and structural evolution were in situ investigated for two types Ag2WO4 up to 34.5 GPa using synchrotron X-ray diffraction, Raman spectroscopy, and first principle calculation. Both theoretical and experimental results showed that α-Ag2WO4 is thermodynamically stable, and no phase transition presents under pressure. In contrast, for β-Ag2WO4, one pressure-induced phase transition presents at 7.6 GPa and completely finishes around 12.8 GPa. This high pressure phase is monoclinic structure, being one new structure for Ag2WO4. This monoclinic phase keeps stable to 34.5 GPa, but it will convert back to the α phase rather than the initial β phase during decompression, meaning this phase transition is irreversible. Moreover, theoretical result predicts γ-Ag2WO4 will transform to β-Ag2WO4 around 5.0 GPa, resulting one phase transition sequence of γ→β→monoclinic phase→α for γ-Ag2WO4 during a decompression-decompression cycle. These phase transitions were first revealed for polymorphism Ag2WO4, which is helpful for its application in high pressure condition.</div></div>","PeriodicalId":430,"journal":{"name":"Solid State Communications","volume":"401 ","pages":"Article 115940"},"PeriodicalIF":2.1,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143738239","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

Anisotropic magnetocaloric effect and first- principle calculations on Nd2Fe14B

IF 2.1 4区物理与天体物理

Solid State Communications Pub Date : 2025-03-27 DOI: 10.1016/j.ssc.2025.115935

M.M. Elkenany , S.H. Aly , Sherif Yehia , Doug Westmoreland , Fatema Z. Mohammad

引用次数: 0

Investigation of structural and electrical characteristics of the honeycomb-lattice BaNi1.5Co0.5(PO4)2

IF 2.1 4区物理与天体物理

Solid State Communications Pub Date : 2025-03-27 DOI: 10.1016/j.ssc.2025.115934

Shalini Mishra, Sakshi Upadhyay, Manish Kumar Tekam, Netram Kaurav

{"title":"Investigation of structural and electrical characteristics of the honeycomb-lattice BaNi1.5Co0.5(PO4)2","authors":"Shalini Mishra, Sakshi Upadhyay, Manish Kumar Tekam, Netram Kaurav","doi":"10.1016/j.ssc.2025.115934","DOIUrl":"10.1016/j.ssc.2025.115934","url":null,"abstract":"<div><div>We report a comprehensive study of the single-phase polycrystalline BaNi1.5Co0.5(PO4)2 material synthesized via a solid-state technique. In order to assess the structural characteristics and progress of the synthesis of BaNi1.5Co0.5(PO4)2, we analysed the material by X-ray diffraction (XRD) with a Cu-Kα radiation source (λ = 1.54 Å). The diffraction results reveal a trigonal crystal structure with a space group. To further investigate the sample's properties and examine its microstructure, we utilised field-emission scanning electron microscopy (FESEM) and energy-dispersive X-ray spectroscopy (EDX) to analyse the surface morphology and elemental composition, confirming the presence of specific elements. Raman spectroscopy and FTIR analysis indicated that the different vibrational modes exhibited various stretching and vibrational patterns. As the frequency increases, the dielectric constant and loss factor of the composites decrease due to relaxation, as evidenced by the investigation of dielectric properties. The spectra of electrical modulus and impedance showed deviations from the ideal Debye-like relaxation, suggesting a more intricate dielectric behaviour.</div></div>","PeriodicalId":430,"journal":{"name":"Solid State Communications","volume":"401 ","pages":"Article 115934"},"PeriodicalIF":2.1,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143738240","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

Structural and photoluminescence studies of LaNbO4:Er3+ phosphors synthesized via citric based sol-gel route for WLED applications

IF 2.1 4区物理与天体物理

Solid State Communications Pub Date : 2025-03-27 DOI: 10.1016/j.ssc.2025.115937

P. Remya Mohan , E. Sreeja , Adon Jose , T. Krishnapriya , Cyriac Joseph , P.R. Biju

{"title":"Structural and photoluminescence studies of LaNbO4:Er3+ phosphors synthesized via citric based sol-gel route for WLED applications","authors":"P. Remya Mohan , E. Sreeja , Adon Jose , T. Krishnapriya , Cyriac Joseph , P.R. Biju","doi":"10.1016/j.ssc.2025.115937","DOIUrl":"10.1016/j.ssc.2025.115937","url":null,"abstract":"<div><div>A series of Er3+ activated LaNbO4 phosphor were synthesized via citric sol-gel method. The structural, elemental and morphological investigations were done by XRD, FTIR, EDS, SEM and TEM analysis. Structural studies confirm the monoclinic phase of the phosphor and micro structure nature of the samples were analyzed by SEM and TEM analysis. UV–Vis–NIR optical absorption spectrum of La0.99NbO4:0.01Er3+ phosphor was analyzed on the basis of Judd-Ofelt theory and radiative properties were calculated using JO intensity parameters. The energy transfer from host to Er3+ ions were studied at host excitation of 251 nm. Under 379 nm excitation of Er3+ ions, LaNbO4:Er3+ phosphors emit intense green light due to transitions 2H11/2 → 4I15/2 and 4S3/2 → 4I15/2. NIR photoluminescence spectra were measured and intense near infrared emission at 980 nm (4I11/2 → 4I15/2) and 1535 nm (4I13/2 → 4I15/2) were observed under 800 nm excitation. Upconversion fluorescence properties of La1-xNbO4:xEr3+ phosphors have also been studied at 980 nm excitation and three strong emissions were observed around 529 nm (2H11/2 → 4I15/2), 551 nm (2S3/2 → 4I15/2) and 668 nm (4F9/2 → 4I15/2). CIE chromaticity studies were done for both downconversion and upconversion fluorescence. The samples are exhibiting yellowish green emission under both 379 nm and 980 nm excitations and the corresponding CCT values and color purity were also calculated.</div></div>","PeriodicalId":430,"journal":{"name":"Solid State Communications","volume":"401 ","pages":"Article 115937"},"PeriodicalIF":2.1,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143738242","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

NiFe-LDH/co/C@NF composite electrocatalyst with enhanced oxygen evolution reaction performance

IF 2.1 4区物理与天体物理

Solid State Communications Pub Date : 2025-03-27 DOI: 10.1016/j.ssc.2025.115939

Changwen Liu , Xueqiang Dong , Shuyuan Zhai , Mingyang Han , Qian Song , Xuefei Lai , Qin Long , Li Liao

引用次数: 0

Investigation of magnetic properties of disordered Co1.75Ni0.25MnSi full-Heusler alloy

IF 2.1 4区物理与天体物理

Solid State Communications Pub Date : 2025-03-26 DOI: 10.1016/j.ssc.2025.115938

Ashish Kumar , Gunjan Sharma , Roop Chandra , Bal Govind , Chetan Sharma , V.N. Singh

引用次数: 0

Influence of Sb doping on electrical and magnetic properties of SnO2 compounds

IF 2.1 4区物理与天体物理

Solid State Communications Pub Date : 2025-03-25 DOI: 10.1016/j.ssc.2025.115936

K.K. Singha, S.K. Srivastava

{"title":"Influence of Sb doping on electrical and magnetic properties of SnO2 compounds","authors":"K.K. Singha, S.K. Srivastava","doi":"10.1016/j.ssc.2025.115936","DOIUrl":"10.1016/j.ssc.2025.115936","url":null,"abstract":"<div><div>Extensive research has been conducted to explore the potential applications of oxide materials doped with non–magnetic elements for spintronic devices. Our current investigation focuses on the synthesis of Sn1-xSbxO2 (where x ranges from 0 to 0.10 with a step size of 0.02) polycrystalline samples via the traditional solid–state reaction method, along with an analysis of their current–voltage (I–V) characteristics, high–temperature resistivity, and room temperature magnetic hysteresis (B–H) curves. By employing an electrometer, the I–V characteristics were recorded and it indicate that the incorporation of Sb doping enhances the conductivity of SnO2, resulting in a lower voltage for leakage current saturation. The high temperature electrical resistivity measurements of these compounds revealed that an increase of Sb doping concentrations led to the reduction of the resistivity. The B–H loop study displays ferromagnetic behaviour along-with coercivity value increasing from 540 Oe to 620 Oe upon increasing Sb doping concentrations.</div></div>","PeriodicalId":430,"journal":{"name":"Solid State Communications","volume":"401 ","pages":"Article 115936"},"PeriodicalIF":2.1,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725602","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

Unveiling structure-activity relationship between carbon crystallography and sodium ion battery anodes

IF 2.1 4区物理与天体物理

Solid State Communications Pub Date : 2025-03-22 DOI: 10.1016/j.ssc.2025.115933

Yanyan Li

引用次数: 0

Vacancy-induced localized modes and impurity band formation in the Haldane model: A quantum dot analogy 霍尔丹模型中的空位诱导局部模式和杂质带形成：量子点类比

IF 2.1 4区物理与天体物理

Solid State Communications Pub Date : 2025-03-22 DOI: 10.1016/j.ssc.2025.115923

Hussein Al-Shuwaili , Zahra Noorinejad , Mohsen Amini , Morteza Soltani , Ebrahim Ghanbari-Adivi

{"title":"Vacancy-induced localized modes and impurity band formation in the Haldane model: A quantum dot analogy","authors":"Hussein Al-Shuwaili , Zahra Noorinejad , Mohsen Amini , Morteza Soltani , Ebrahim Ghanbari-Adivi","doi":"10.1016/j.ssc.2025.115923","DOIUrl":"10.1016/j.ssc.2025.115923","url":null,"abstract":"<div><div>In this study, the Haldane model’s edge states are utilized to illustrate that a zero-energy localized state forms around a single vacancy in the model. In order to complete this task, the conventional unit cell associated to the Haldane hexagonal structure is transferred onto a two-leg ladder in momentum space, effectively forming an extended Su–Schrieffer–Heeger (SSH) lattice through a one-dimensional Fourier transform. Through the application of a suitable unitary transformation, the two-leg SSH ladder in momentum space is converted into an equivalent lattice with two distinct on-site states with different momentum that are suitable for the calculations. Ultimately, the desired zero-energy localized mode formed around the vacant-site is represented by a combination of the armchair edge states. Furthermore, the scenario involving two vacant sites is investigated and it is revealed that an effective hopping interaction exists between the localized states formed around the on-site vacancies created along a zigzag chain in the lattice. This structure can be likened to the structure of a quantum dot with two none-degenerate energy levels. Such a hopping interaction is absent for the same vacancies created on the armchair chains. Finally, it is shown that introducing vacancies periodically on the sites of a zigzag row along a finite-width ribbon with the Haldane structure leads to the emergence of an impurity band within the energy gap.</div></div>","PeriodicalId":430,"journal":{"name":"Solid State Communications","volume":"401 ","pages":"Article 115923"},"PeriodicalIF":2.1,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143685489","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

Valley and spin filtering using multiple Magnetic barriers on a TMDC nanoribbon

IF 2.1 4区物理与天体物理

Solid State Communications Pub Date : 2025-03-22 DOI: 10.1016/j.ssc.2025.115919

Seok Jin Yang , Daehan Park , Suejeong You , Heesang Kim , Nammee Kim

{"title":"Valley and spin filtering using multiple Magnetic barriers on a TMDC nanoribbon","authors":"Seok Jin Yang , Daehan Park , Suejeong You , Heesang Kim , Nammee Kim","doi":"10.1016/j.ssc.2025.115919","DOIUrl":"10.1016/j.ssc.2025.115919","url":null,"abstract":"<div><div>A quantum system is investigated as a valley and spin filter using the three-band tight-binding model (TBM) and Landauer–Büttiker formalism. In a transition-metal dichalcogenide (TMDC) zigzag nanoribbon (ZNR) with multiple magnetic barriers, the valley Zeeman effect causes broken valley degeneracy of the <math><mi>K</mi></math> and <math><msup><mrow><mi>K</mi></mrow><mrow><mo>′</mo></mrow></msup></math> valleys in each magnetic barrier (MB) region. The energy band shifts upward for the <math><msup><mrow><mi>K</mi></mrow><mrow><mo>′</mo></mrow></msup></math> valley and downward for the <math><mi>K</mi></math> valley, or vice versa, depending on the direction of the magnetic field. The influence of an MB on carriers moving from the source to the drain varies depending on the valley involved. Fano resonance in the <math><mi>K</mi></math> valley and resonance tunneling in the <math><msup><mrow><mi>K</mi></mrow><mrow><mo>′</mo></mrow></msup></math> valley make the main contributions to valley polarization. With intrinsic spin–orbit coupling (SOC) and the ordinary Zeeman effect, the spin degeneracy of the energy bands in both valleys is broken, leading to spin polarization. Both polarizations can be enhanced by increasing either the number of MBs or the strength of the external magnetic field. With the optimized parameters of this system, it is possible to obtain currents with selective spin and valley by manipulating the incident carrier energy. An experimental implementation of this system could enable control over the carriers’ spin and valley degrees of freedom in upcoming devices.</div></div>","PeriodicalId":430,"journal":{"name":"Solid State Communications","volume":"401 ","pages":"Article 115919"},"PeriodicalIF":2.1,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697347","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