Radjia Belguet, Nabil Mahamdioua, Faiza Meriche, Fatih Denbri, Jose A. Alonso, Jose L. Martinez, Sevgi Polat-Altintas, Cabir Terzioglu
{"title":"On the Magnetotransport Properties and Griffith Phase in the (({varvec{L}}{varvec{a}},{{varvec{G}}{varvec{d}})}_{1.4}({{varvec{C}}{varvec{a}},{varvec{S}}{varvec{r}})}_{1.6}{mathbf{M}mathbf{n}}_{2}{mathbf{O}}_{7}) Double-Layered Manganites","authors":"Radjia Belguet, Nabil Mahamdioua, Faiza Meriche, Fatih Denbri, Jose A. Alonso, Jose L. Martinez, Sevgi Polat-Altintas, Cabir Terzioglu","doi":"10.1007/s10909-025-03284-5","DOIUrl":"10.1007/s10909-025-03284-5","url":null,"abstract":"<div><p>The double-layered manganite <span>({La}_{1.2}{Gd}_{0.2}{Ca}_{1.2}{Sr}_{0.4}{Mn}_{2}{O}_{7})</span> was prepared by the solid-state reaction route, and its structural, microstructural, magnetic, electrical, and magnetotransport properties were investigated. Rietveld refinement analysis of the X-ray diffractogram shows that the structure is indexed in a tetragonal structure with an I4/mmm space group with an impurity phase. The microstructure was examined using scanning electron microscopy. The purity of the sample was examined by the energy-dispersive X-ray spectroscopy investigation. In the context of magnetic measurements, inverse susceptibility, hysteresis loop, and the magnetic behavior of the compound are discussed in detail. The sample displays a phase transition from ferromagnetic (FM) to paramagnetic (PM) at <span>({T}_{C})</span>, which is equal to 290.13 K. Additionally a Griffith phase (GP) was identified and was found to be 339 K. The sample can be thought of as spin-glass-like since a significant divergence was observed at low temperatures between the magnetization curves M (T) in the zero-field cooling (ZFC) and in the field cooling (FC) modes. The electrical resistivity under an applied magnetic field of 1 T exhibits a metal–insulator transition (<span>({T}_{MI})</span>) at 152.98 K. The magnetoresistance was observed to decrease with increasing temperature, peaking at 23% at 11 K. The electrical resistivity in the ferromagnetic region (<span>(T < T_{MI})</span>) has been found to be a combination of residual resistivity and resistivities due to the weak localization, and to the electron–electron, while the adiabatic small polaron and variable range hopping models may be used to explain the resistivity data at high temperature in paramagnetic region (<span>(T> T_{MI})</span>).</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"219 3-4","pages":"123 - 144"},"PeriodicalIF":1.1,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143888649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
{"title":"Study of Magnetic and Thermal Properties of Graphene by Tsallis Formalism: Deformed of the Heisenberg Model","authors":"Chaofan Hu, Jie Zhang","doi":"10.1007/s10909-025-03292-5","DOIUrl":"10.1007/s10909-025-03292-5","url":null,"abstract":"<div><p>A simple nonrelativistic model is introduced based on the deformed of the Heisenberg algebra. In this model, the commutator of momenta is proposed proportional to the pseudospin. The low-energy excitations of graphene are derived by using this model. The Landau problem has been solved by taking into account a uniform magnetic field perpendicular to the plane. Then, the Tsallis non-additive formalism is employed to obtain the probability and the partition function for two branches, the positive and negative. Finally, the magnetic susceptibility and thermodynamic properties of graphene are determined. The findings reveal that the magnetic susceptibility has a positive value and shows a paramagnetic behavior in each branch. The susceptibility in the negative branch has a lower value in comparison to the positive branch for any values of non-extensive parameter. The specific heat displays a peak structure. For a given non-extensive parameter, the peak position of the specific heat occurs at a particular temperature in each branch. The results show that both parameters, temperature and non-extensive parameter, have important roles in magnetic susceptibility and thermal properties of the system.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"219 3-4","pages":"209 - 225"},"PeriodicalIF":1.1,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143888637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
{"title":"Effect of Helium Surface Fluctuations on the Rydberg Transition of Trapped Electrons","authors":"Mikhail Belianchikov, Natalia Morais, Denis Konstantinov","doi":"10.1007/s10909-025-03294-3","DOIUrl":"10.1007/s10909-025-03294-3","url":null,"abstract":"<div><p>Electrons trapped on the surface of liquid helium is an extremely clean system which holds promise for a scalable qubit platform. However, the superfluid surface is not free from fluctuations which might cause the decay and dephasing of the electron’s quantized states. Understanding and mitigating these fluctuations is essential for the advancement of electrons-on-helium qubit technology. Some work has been recently done to investigate surface oscillations due to the mechanical vibration of the cryostat using a superconducting coplanar waveguide resonator. In the present work, we focus on a sub-hertz frequency range and observe a strong effect of surface oscillations on the temporal dynamics of the Rydberg transition of electrons confined in a microchannel trapping device. We suggest possible origin of such oscillations and find a reasonable agreement between the corresponding estimation of the oscillation frequency and the observed result.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"219 5-6","pages":"301 - 311"},"PeriodicalIF":1.4,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10909-025-03294-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
G. Isopi, E. Barbavara, E. S. Battistelli, P. de Bernardis, F. Cacciotti, V. Capalbo, A. Carbone, E. Carretti, D. Ciccalotti, F. Columbro, A. Coppolecchia, A. Cruciani, G. D’ Alessandro, M. De Petris, F. Govoni, L. Lamagna, E. Levati, P. Marongiu, A. Mascia, S. Masi, E. Molinari, M. Murgia, A. Navarrini, A. Novelli, A. Occhiuzzi, A. Orlati, A. Paiella, E. Pappalardo, G. Pettinari, F. Piacentini, T. Pisanu, S. Poppi, I. Porceddu, A. Ritacco, M. R. Schirru, G. Vargiu
{"title":"MISTRAL: Science Perspectives and Performance Forecasts","authors":"G. Isopi, E. Barbavara, E. S. Battistelli, P. de Bernardis, F. Cacciotti, V. Capalbo, A. Carbone, E. Carretti, D. Ciccalotti, F. Columbro, A. Coppolecchia, A. Cruciani, G. D’ Alessandro, M. De Petris, F. Govoni, L. Lamagna, E. Levati, P. Marongiu, A. Mascia, S. Masi, E. Molinari, M. Murgia, A. Navarrini, A. Novelli, A. Occhiuzzi, A. Orlati, A. Paiella, E. Pappalardo, G. Pettinari, F. Piacentini, T. Pisanu, S. Poppi, I. Porceddu, A. Ritacco, M. R. Schirru, G. Vargiu","doi":"10.1007/s10909-025-03277-4","DOIUrl":"10.1007/s10909-025-03277-4","url":null,"abstract":"<div><p>The MIllimeter Sardinia radio Telescope Receiver based on Array of Lumped elements (MISTRAL) KIDs is a millimeter camera operating at 90GHz that was recently installed on the Sardinia Radio Telescope (SRT) as part of the SRT-HighFreq program, which aims to expand the capabilities of the radio telescope up to the W-band. After technical and scientific commissioning (2023–2024), MISTRAL will be open to proposals from scientists as a facility instrument. MISTRAL provides a wide 4’ field of view, sampled at a resolution of 12” with approximately 400 kinetic inductance detectors. The sky in the W-band is well explored by CMB experiments; however, their resolution is limited to about 1’. Using large single-dish radio telescopes like SRT or the Green Bank Telescope allows to probe angular scales down to 10–12”, allowing scientists to obtain new data and complementary information in multiple scientific cases. In this contribution, we will review observational perspectives and performance forecasts of MISTRAL, based on laboratory measurements of the noise properties, for selected scientific cases such as galactic science and high-resolution measurements of the Sunyaev–Zel’Dovich effect in galaxy clusters and in the cosmic web.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"219 3-4","pages":"79 - 86"},"PeriodicalIF":1.1,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10909-025-03277-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143888577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Faizuddin Ahmed, Abdelmalek Bouzenada, Allan R. P. Moreira
{"title":"Effects of Conical Geometry on Approximate Solutions Under Modified Pöschl-Teller Potential and Shannon Entropy","authors":"Faizuddin Ahmed, Abdelmalek Bouzenada, Allan R. P. Moreira","doi":"10.1007/s10909-025-03282-7","DOIUrl":"10.1007/s10909-025-03282-7","url":null,"abstract":"<div><p>In this study, we investigate the behavior of non-relativistic quantum particles interacting with a modified Pöschl-Teller potential in the backdrop of a topological defect created by global monopoles. We derive the radial equation of the Schrödinger wave equation through a wave function ansatz and obtain an approximate <span>(ell ne 0)</span>-state eigenvalue solution by employing the Nikiforov-Uvarov method. Our analysis demonstrates that the presence of a global monopole affects both the energy eigenvalue and the wave functions of non-relativistic quantum particles, deviating from the behavior observed in flat space with this potential. Furthermore, we calculate the Shannon entropy for this quantum system and evaluate how the existence of the topological defect and potential influences it.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"219 3-4","pages":"87 - 102"},"PeriodicalIF":1.1,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143888589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
{"title":"Surface Electrons on Solid Quantum Substrates: A Brief Review","authors":"Paul Leiderer","doi":"10.1007/s10909-025-03286-3","DOIUrl":"10.1007/s10909-025-03286-3","url":null,"abstract":"<div><p>In this work an overview is given on experiments with surface electrons above the quantum solids hydrogen and neon. While two-dimensional ensembles of surface electrons on the quantum liquid superfluid helium have been studied already in great detail, investigations of electrons on quantum solids are rather sparse. Since recently electron-on-neon qubits have been shown to exhibit very long coherence times, there is a demand for understanding the conditions for a successful growth of thin solid neon films as a qubit substrate. Therefore, in this review also the triple point wetting phenomenon of the hydrogen isotopes and neon is discussed, which dominates the growth of solid films of these materials.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"219 5-6","pages":"262 - 281"},"PeriodicalIF":1.4,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10909-025-03286-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Naman A. Naushahi, I. Angervo, H. Huhtinen, M. Lastusaari, M. Chromy, A. Ernst, P. Paturi
{"title":"Influence of Fe/Mo Stoichiometry on Structural and Magnetic Properties in (hbox {Sr}_2hbox {Fe}_xhbox {Mo}_{2-x}hbox {O}_6): A Theoretical and Experimental Study","authors":"Naman A. Naushahi, I. Angervo, H. Huhtinen, M. Lastusaari, M. Chromy, A. Ernst, P. Paturi","doi":"10.1007/s10909-025-03288-1","DOIUrl":"10.1007/s10909-025-03288-1","url":null,"abstract":"<div><p>The influence of nonstoichiometry on the structural and magnetic properties of <span>(hbox {Sr}_2hbox {FeMoO}_6)</span> (SFMO) has been investigated by varying the ratio of Fe in polycrystalline samples. We demonstrate that changes in the Fe/Mo ratio can elevate the Curie temperature (<span>(T_textrm{C})</span>) in SFMO, even though the total magnetic moment is reduced at the same time. The discoveries of the stoichiometric imbalance between the cations Fe and Mo are discussed in the context of first-principles calculations on the electronic and magnetic structures of SFMO using the GGA+U method. Our theoretical results reveal that Fe deficiency reduces the <span>(T_textrm{C})</span> due to the antiparallel alignment of Fe moments in Mo positions, which is consistent with experimental observations. In contrast, accurate <span>(T_textrm{C})</span> trends for Fe excess are reproduced only by considering spin disorder, with both parallel and antiparallel Fe moment orientations. These insights provide a detailed understanding of the magnetic interactions in SFMO. Our findings lay the groundwork for developing innovative SFMO-based materials and emphasize the significance of stoichiometry control in optimizing SFMO properties.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"219 3-4","pages":"157 - 171"},"PeriodicalIF":1.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10909-025-03288-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143888585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Jun Zhang, Peng Wang, Changcheng Ma, Yi Huo, Xudi Wang, Rui Huang, Qing Cao
{"title":"Investigation on the Mechanism of Maximum Efficiency Point for Helium-Based Oscillating Heat Pipe","authors":"Jun Zhang, Peng Wang, Changcheng Ma, Yi Huo, Xudi Wang, Rui Huang, Qing Cao","doi":"10.1007/s10909-025-03290-7","DOIUrl":"10.1007/s10909-025-03290-7","url":null,"abstract":"<div><p>Liquid helium cryogenic system is crucial for achieving low-temperature superconductivity in particle accelerator and controllable nuclear fusion devices. However, the heat conductivity of copper in the 4K region is 400–800 W m<sup>−1</sup> K<sup>−1</sup>, which limits the performance of superconductivity system. The application of helium-based oscillating heat pipe (OHP) promotes this deficiency mitigation, with a maximum effective thermal conductivity (ETC) ranging from 4000 to 16,000 W m<sup>−1</sup> K<sup>−1</sup>. Although numerous scholars have experimentally observed the maximum efficiency point of OHP, but its underlying mechanism remains unclear. In this study, a test rig for measuring the heat transfer performance and dynamic parameters of helium-based OHP in the 4K region was constructed. A numerical simulation method for the gas–liquid two-phase unsteady flow process in the OHP was established. The amplitude and period distribution of dynamic pressure fluctuations in OHP were analyzed. The correlation between its pressure fluctuations and heat transfer process was explored. Finally, the mechanism of the maximum efficiency point was revealed with the oscillating characteristics for helium-based OHP in the 4K region.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"219 3-4","pages":"172 - 195"},"PeriodicalIF":1.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143888586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Zhichao Chen, Xingyu Zhang, Lixing You, Lingyun Li
{"title":"A SFQ-to-CMOS Interface Circuit Based on SiGe BiCMOS for Josephson-CMOS Hybrid System","authors":"Zhichao Chen, Xingyu Zhang, Lixing You, Lingyun Li","doi":"10.1007/s10909-025-03291-6","DOIUrl":"10.1007/s10909-025-03291-6","url":null,"abstract":"<div><p>In this article, a novel DC-biased interface for multi-channel superconducting computers was designed, fabricated, and tested. Conventional interfaces for Josephson-CMOS memory rely on Josephson latching drivers (JLDs) or SQUID (Superconducting Quantum Interference Device) stacks to convert weak signals. However, SQUID stacks achieve high frequencies (tens of GHz) but produce only a few millivolts of output and occupy large areas, while JLDs provide higher output voltages (tens of millivolts) but require AC bias. To address these limitations, an interface based on SiGe BiCMOS (Silicon-Germanium Bipolar CMOS) technology was proposed, integrating the functions of JLDs and CMOS amplifiers into a single chip. Fabricated using a 130 nm SiGe BiCMOS process, the interface converts 200 µV to 1.2 V with a power consumption of only 386 µW per channel at 4.2 K. Low-frequency measurements demonstrated 21-channel signal conversion without the need for clock synchronization or additional amplifiers, significantly simplifying the cryogenic system. The proposed interface features key advantages, including DC bias, high gain, and asynchronous operation, making it a practical solution for superconductor–semiconductor signal conversion. While its maximum speed is currently limited, this interface represents a promising step toward scalable, energy-efficient multi-channel superconducting computers.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"219 3-4","pages":"196 - 208"},"PeriodicalIF":1.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143888504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
{"title":"Growth of Uniform Helium Submonolayers Adsorbed on Single-Surface Graphite Observed by Surface X-ray Diffraction","authors":"Atsuki Kumashita, Hiroo Tajiri, Jun Usami, Yu Yamane, Shigeki Miyasaka, Hiroshi Fukuyama, Akira Yamaguchi","doi":"10.1007/s10909-025-03289-0","DOIUrl":"10.1007/s10909-025-03289-0","url":null,"abstract":"<div><p>We observed surface X-ray diffraction from <sup>4</sup>He submonolayers adsorbed on a single-surface graphite using synchrotron X-rays. Time evolutions of scattering intensities along the crystal truncation rod (CTR) were observed even after reaching the base low temperature in a selected condition of sample preparation. Our simulations for CTR scatterings based on the random double-layer model, in which helium atoms are distributed randomly in the first and second layers with a certain occupancy ratio, can consistently explain the observed intensity changes. These results support the scenario that He atoms are stratified initially as a nonequilibrium state and then relaxed into a uniform monolayer by surface diffusion, where the relaxation process was observed as a decrease in CTR scattering intensity. The observed time constant was, however, much longer than those estimated from quantum and thermal surface diffusions. This implies homogeneous processes in surface diffusions were strongly suppressed by local potentials in such as atomic steps or microcrystalline boundaries.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"220 1-2","pages":"115 - 123"},"PeriodicalIF":1.4,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145170557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}