Results in Physics最新文献

{"title":"Theoretical investigations on exploring Si-based heterostructures with cubic and ground-state perovskites","authors":"Yunting Liang ,&nbsp;Yajun Zhang ,&nbsp;Wenyi Tong ,&nbsp;Philippe Ghosez ,&nbsp;Eric Bousquet ,&nbsp;Matjaž Spreitzer","doi":"10.1016/j.rinp.2024.108022","DOIUrl":"10.1016/j.rinp.2024.108022","url":null,"abstract":"<div><div>First principles calculations in the framework of density functional theory (DFT) are performed to exploit replaceable perovskite oxides against the instability of traditional cubic SrTiO₃ grown on silicon substrate. In this work, we consider more thermostable CaTiO₃ and CaZrO₃ with cubic and ground-state phase as the candidates to perform the gate dielectric. After the calibration of total energy and lattice transformation of ground-state perovskites to match with Si substrate, three categories of 2 × 2 heterostructures have been constructed and investigated through the geometrical change, atom displacement around interfacial layer, total energy and electronic structure change, under the variations on perovskite species, the concentration of interfacial layer and the thickness of perovskite film. And the results demonstrate that the category with half a monolayer of Ca/Sr atoms in interfacial layer and two unit-cell perovskite thicknesses show the type-I band alignment through their band alignment. Among this category, the heterostructure with Pnma CaZrO₃ shows semiconductivity and excellent electrical property with larger band offset for the candidate of gate dielectric. This work provides a creative perspective to expand the perovskite diversity for the booming growth of integrated circuit technology.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"66 ","pages":"Article 108022"},"PeriodicalIF":4.4,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142534474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unconventional magnon blockade in a dissipative photon–magnon coupling system","authors":"Xu Deng ,&nbsp;Kai-Kai Zhang ,&nbsp;Tao Shui ,&nbsp;Xiao-Tao Xie ,&nbsp;Wen-Xing Yang","doi":"10.1016/j.rinp.2024.108018","DOIUrl":"10.1016/j.rinp.2024.108018","url":null,"abstract":"<div><div>We investigate unconventional magnon blockade (UMB) in a dissipative photon–magnon coupling cavity, where the coherent and dissipative coupling between photon and magnon can be adjusted by the position of the yttrium iron garnet sphere in the cavity. An approximate analytical solution for the statistical property of magnon is provided, which is in good agreement with the results obtained by numerically solving the Lindblad master equation. Our results indicate that UMB can be achieved in the case of dissipative photon–magnon coupling, but not in the case of coherent photon–magnon coupling. Secondly, by adjusting the amplitude of the external laser field, dynamic control of UMB can be achieved. Finally, by solving the Lindblad master equation containing the occupation number of thermal magnon and photon, the statistical properties of magnons will transition from nonclassical to classical. It is shown that the above phenomena originate from the interference between different quantum paths. Our research may provide theoretical possibilities for quantum manipulation schemes at the single-magnon level and open up a new avenue for designing single-magnon sources in a dissipative photon–magnon coupling system.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"66 ","pages":"Article 108018"},"PeriodicalIF":4.4,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142534435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tangent hyperbolic MHD nanoliquids on non-isothermal stretched sheets: Analyzing the impact of transport parameters, variable fluid properties and convective boundary conditions","authors":"K.V. Prasad ,&nbsp;Fateh Mebarek-Oudina ,&nbsp;Hanumesh Vaidya ,&nbsp;Rajashekhar Choudhari ,&nbsp;Shruthi Karanth ,&nbsp;D. Tripathi","doi":"10.1016/j.rinp.2024.108008","DOIUrl":"10.1016/j.rinp.2024.108008","url":null,"abstract":"<div><div>The key focus of this research is to look at how tangent hyperbolic magnetohydrodynamic (MHD) nano-liquids move in a non-isothermal coagulated stretched sheet. In this study, we intend to explore how fluid behavior responds to alternations in transport physical parameters. The coagulated sheet is subjected to two distinct boundary conditions to inspect the heat and mass transport rate of the nano liquid. The convective heat boundary condition (CBC) and mass-convective boundary condition (MCBC) are employed to specify the physical conditions at the boundaries of the problem domain. The boundary conditions, responsible for regulating heat flow and mass transfer rates, play a crucial role in shaping the liquid’s behavior. Using a similarity solution, the partial differential equation describing the flow of mass and heat within the system transforms into an interconnected network of non-linear ordinary differential equations. These mathematical equations are subsequently figured out using a numerical finite difference method. This study additionally examines the correlation between thermophoresis and Brownian motion, two fundamental concepts in the dynamics of colloidal suspensions. The study’s findings indicate that the temperature profile increases in all scenarios when the variable thermal conductivity and variable viscosity parameters are increased. In contrast, for the same parameters, the velocity profile is decreased. Further, increasing wall thickness reduces heat dissipation; consequently, the temperature profile similarly affects the velocity power index. The Biot number improves the rates of temperature transfer. These results underscore the significant influence of these parameters in predicting the behavior of MHD tangent hyperbolic nanofluids. This study elucidates the intricate interaction among different physical parameters in the dynamics of nano liquids, which holds significant implications for various industrial applications.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"66 ","pages":"Article 108008"},"PeriodicalIF":4.4,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142534434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Magneto-optic properties of highly Dy3+-doped GeO2-B2O3 glasses for NIR optical applications","authors":"Linganna Kadathala ,&nbsp;Yong-Tak Ryu ,&nbsp;Young-Ouk Park ,&nbsp;Seongmin Ju ,&nbsp;Bok Hyeon Kim","doi":"10.1016/j.rinp.2024.108016","DOIUrl":"10.1016/j.rinp.2024.108016","url":null,"abstract":"<div><div>Recent progress in the development of optical communication and high power laser systems in the near-infrared (NIR) region (1.5 to 2.0 μm) increased the demand for magneto-optic (MO) devices employing MO materials. These MO materials are required with lower optical absorption coefficients and higher Verdet constants at spectral range of interest. In this study, two series of highly Dy³⁺-doped GeO₂–B₂O₃ glasses with and without P₂O₅ were fabricated using a simple melt-quenching technique. The glasses were characterized through various techniques (Raman, UV–VIS-NIR, and DTA) for the evaluation of characteristic properties with respect to the Dy₂O₃ concentration and glass composition. Faraday rotation measurement was carried out at 1550 nm to quantify the Verdet constant of the glasses. The Verdet constant values were found to increase linearly with increasing Dy³⁺ concentration for both the glass systems. The increase in Dy³⁺ concentration and, consequently, the number of unpaired electrons, leads to an increase in the Verdet constant. The GeO₂-B₂O₃ glass doped with 30 mol% of Dy₂O₃ exhibited the highest Verdet constant of −5.36 rad/(T⋅m) at 1550 nm. The glasses exhibited a good optical transparency (&gt;70 %) in the region covering from 400 to 2400 nm. The thermo-physical, optical, and polarizability properties of both glass systems were also investigated. The results indicate that the highly Dy³⁺-doped glasses are attractive for magneto-optics at 1550 nm.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"66 ","pages":"Article 108016"},"PeriodicalIF":4.4,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142534475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First principle study of structural and optoelectronic properties of ZnLiX3 (X = Cl or F) perovskites","authors":"Izzat Khan ,&nbsp;Amir Ullah ,&nbsp;Nasir Rahman ,&nbsp;Mudasser Husain ,&nbsp;Vineet Tirth ,&nbsp;Mohammad Sohail","doi":"10.1016/j.rinp.2024.108019","DOIUrl":"10.1016/j.rinp.2024.108019","url":null,"abstract":"<div><div>The zinc-based perovskites ZnLiX₃ (X = Cl or F) were investigated for their structural, electronic, and optical properties using the WIEN2k package within density functional theory (DFT). Structural properties were calculated using the generalized gradient approximation (GGA), while the modified Becke-Johnson (mBJ) potential was applied for a more accurate description of the optical and electronic properties. Both compounds are confirmed to be stable, crystallizing in the cubic Pm-3 m (No. 221) space group. ZnLiCl₃ has an indirect band gap of 0.30 eV between the Γ and M symmetry points, indicating semiconducting behaviour, while ZnLiF₃ exhibits an indirect band gap of 5.45 eV, typical of an insulating material. The electronic states contributing to the band structure were analyzed using the total density of states (TDOS) and partial density of states (PDOS). Optical properties, evaluated in the energy range of 0–14 eV, reveal strong optical conductivity and absorption at higher energies, while both materials show transparency to lower-energy photons. These findings suggest that ZnLiCl₃ and ZnLiF₃ are suitable candidates for high-frequency UV optoelectronic device applications.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"66 ","pages":"Article 108019"},"PeriodicalIF":4.4,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142534570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Large and reversible elastocaloric effect induced by low stress in a Ga-doped Ni-Mn-Ti alloy","authors":"L.A. Ascencio de la Cruz ,&nbsp;M. López-Medina ,&nbsp;D.E. Soto-Parra ,&nbsp;D. Ríos-Jara ,&nbsp;J.P. Camarillo-Garcia ,&nbsp;H. Flores-Zúñiga","doi":"10.1016/j.rinp.2024.108009","DOIUrl":"10.1016/j.rinp.2024.108009","url":null,"abstract":"<div><div>The Solid-state cooling based on caloric effects is considered a potential alternative to conventional refrigeration technology, which uses ozone-depleting gases. Several shape memory alloys have attracted attention for solid-state cooling since they present a high reversibility of the caloric effect, which depends mainly on thermal hysteresis and sensitivity to the applied field. In the present work, a study substitution of Mn by Ga in the Ni₅₀Mn₃₄Ti₁₆ alloy led to diminished thermal hysteresis in the martensitic transformation by 9 K. The elastocaloric effect, thermal and microstructure properties of a polycrystalline Ni₅₀Mn₃₂Ti₁₆Ga₂ alloy have been characterized. The elastocaloric effect was obtained indirectly from the length change as a function of temperature at constant stress. An isothermal entropy change (Δ<em>S</em>_ISO) of 23.0 J kg⁻¹ K⁻¹ during heating and 22.0 J kg⁻¹ K⁻¹ during cooling was observed for applied stress of 160 MPa. In addition, the Δ<em>S</em>_ISO is reversible for a temperature span between 287 and 319 K, reaching a maximum of 20.5 J kg⁻¹ K⁻¹ at 299 K. The thermal hysteresis changed slightly while the applied stress increased up to 160 MPa since the sensitivity of the martensitic transformation temperatures to stress was 0.150 K/MPa during cooling and 0.160 K/MPa during heating. The X-ray diffraction analysis revealed a mixture of B2-type cubic austenite, 5M modulated martensite, and a second intermetallic phase identified as Ni₃Ti. All these results were obtained around room temperature.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"66 ","pages":"Article 108009"},"PeriodicalIF":4.4,"publicationDate":"2024-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modification of microstructural, mechanical and optical properties with carbon ion irradiation in Y2SiO5 crystals","authors":"Hong-Lian Song ,&nbsp;Xiao-Fei Yu ,&nbsp;Sen Sun ,&nbsp;Jian He ,&nbsp;Yu-Mei Huang","doi":"10.1016/j.rinp.2024.108015","DOIUrl":"10.1016/j.rinp.2024.108015","url":null,"abstract":"<div><div>Yttrium orthosilicate Y₂SiO₅ crystals, a member of the silicate family, are versatile and multifunctional materials when doped with rare earth or transition metal ions. However, there have been limited investigations into the impact of ion irradiation on the crystal structure of Y₂SiO₅ crystals to date. In this paper, the effect of microstructure, mechanical and optical properties of Y₂SiO₅ crystal before and after different fluences of carbon ions irradiation was investigated utilizing complementary characterization techniques. The results indicate that carbon ion irradiation caused lattice disorder and damage, which resulted in structural deterioration and changes in optical properties, such as decrease in the optical band gap energy (from5.77 eV to 5.44 eV), changes in the effective refractive index (<em>n_eff)</em> which resulted in the formation of “well + barrier” type and “barrier” type waveguides. In addition, elastic modulus increased after carbon ion irradiation. The results will be helpful for understanding the damage study of the Y₂SiO₅ crystal with carbon ion irradiation and proving that ion beam techniques can be used for material modification.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"66 ","pages":"Article 108015"},"PeriodicalIF":4.4,"publicationDate":"2024-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142438367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Combined etching technology for controlling surface damage precursors to improve laser damage resistance of fused silica","authors":"Zhigang Yuan ,&nbsp;Wenhui Deng ,&nbsp;Qiancai Wei ,&nbsp;Bo Li ,&nbsp;Lian Zhou ,&nbsp;Qinghua Zhang ,&nbsp;Jian Wang ,&nbsp;Xiaotao Zu ,&nbsp;Xiangyang Lei ,&nbsp;Bo Zhong","doi":"10.1016/j.rinp.2024.108011","DOIUrl":"10.1016/j.rinp.2024.108011","url":null,"abstract":"<div><div>At present, a single post-processing technology will always introduce secondary defects (trace pollution elements and structural defects) while removing surface processing defects of fused silica components, which limits the further improvement of the laser damage threshold of the components. Therefore, to effectively remove surface defects in optically-processed fused silica and suppress defect regeneration is the key to improve the laser damage resistance performance of the components. Based on the complementarity of anisotropic ion beam etching and isotropic HF acid etching, a combined etching technology is proposed for fused silica components used in engineering. The combined etching can remove most of the fragmented defects on fused silica surface to achieve relatively good surface quality with a root mean square roughness of 0.666 nm. After the combined etching, the contents of most impurity elements decrease by approximately an order of magnitude. Besides, the contents of the structural defects significantly reduce. Therefore, The zero probability damage threshold and the 100 % probability damage threshold increase by 32.41 % and 57.46 %, respectively. The results show that the combined etching technology can effectively improve the laser damage resistance performance of fused silica components, especially under high fluence laser irradiation, which is very important for the high power output and stable operation of laser facilities.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"66 ","pages":"Article 108011"},"PeriodicalIF":4.4,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigating radiation shielding parameters for X-ray attenuation at various energies in locally produced ceramic materials used in Saudi Arabia","authors":"Sultan J. Alsufyani ,&nbsp;Mansour Almurayshid ,&nbsp;Saeed Ahmed Almalki ,&nbsp;Nadi Mlihan Alresheedi ,&nbsp;Tayseer I. Al-Naggar","doi":"10.1016/j.rinp.2024.108006","DOIUrl":"10.1016/j.rinp.2024.108006","url":null,"abstract":"<div><div>To assess shielding effectiveness against X-rays, a number of locally collected ceramic samples were obtained from the Kingdom of Saudi Arabia. Based on elemental analysis, all of the ceramic samples have a density in the range of 1.68–1.85 g/cm³, with the highest proportions of O, Si, C, and Al atoms and the lowest amounts of Na, Mg, K, Ca, Ti, and Fe. The 320 kV X-ray source (Gulmay Limited, Byfleet, UK) was used to assess the attenuation properties of the ceramic samples. An Exradin A4 ionization chamber (Standard Imaging, Middleton, USA) connected to a UNIDOS electrometer (PTW, Freiburg, Germany) in the control room was used to detect the attenuation properties. Several X-ray attenuation coefficients are evaluated at different X-ray energies in the range of 40–150 kV in this study. These include the mass attenuation coefficient (MAC), linear attenuation coefficient (LAC), half-value layer (HVL), tenth-value layer (TVL), and mean free path (MFP). The ability of any ceramic sample under investigation to shield radiation at low X-ray energy is indicated by the theoretical and experimental values of LAC. The potential applications of these easily accessible, reasonably priced ceramic materials for radiation protection in X-ray labs and low-energy X-ray shielding in a variety of fields have been shown by this investigation.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"66 ","pages":"Article 108006"},"PeriodicalIF":4.4,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142438366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Time-dependent relaxation dynamics of remanent strain in textured PMN–PZ–PT and PMN–PIN–PT piezoceramics","authors":"Temesgen Tadeyos Zate ,&nbsp;Astri Bjørnetun Haugen ,&nbsp;Dariusz Mikielewicz ,&nbsp;Jae-Ho Jeon","doi":"10.1016/j.rinp.2024.108007","DOIUrl":"10.1016/j.rinp.2024.108007","url":null,"abstract":"<div><div>Crystallographically textured lead-based piezoceramics, particularly Pb(Mg_1/3Nb_2/3)O₃–PbZrO₃–PbTiO₃ (PMN–PZ–PT) and Pb(Mg_1/3Nb_2/3)O₃–Pb(In_1/2Nb_1/2)O₃–PbTiO₃ (PMN–PIN–PT), play a pivotal role in electromechanical applications due to their enhanced field-induced strain responses. However, challenges in precision positioning arise from heightened remanent strain (S_r) caused by embedded templates in the textured grains, impacting strain cycle consistency due to increased time delay for S_r relaxation. This study investigates the time-dependent relaxation dynamics of S_r in textured PMN–PZ–PT and PMN–PIN–PT piezoceramics, focusing on experimentally determining relaxation time between cycles required for complete S_r relaxation. Our findings reveal that the relaxation time in textured piezoceramics is notably longer than that in their non-textured counterparts, primarily due to pinning of domain walls by embedded templates. This work provides insights into the strain relaxation characteristics of piezoceramics and underscores the importance of time delay in designing precision positioning systems for improved reliability.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"66 ","pages":"Article 108007"},"PeriodicalIF":4.4,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}