Low Temperature Physics最新文献_第3页

Polyamorphism gets a magnetic boost 多态性得到磁场促进

IF 0.8 4区物理与天体物理

Low Temperature Physics Pub Date : 2024-07-19 DOI: 10.1063/10.0026269

V. V. Eremenko, S. S. Saxena, V. A. Sirenko, K. A. Minakova

{"title":"Polyamorphism gets a magnetic boost","authors":"V. V. Eremenko, S. S. Saxena, V. A. Sirenko, K. A. Minakova","doi":"10.1063/10.0026269","DOIUrl":"https://doi.org/10.1063/10.0026269","url":null,"abstract":"Four decades since the concept of polyamorphism was introduced by [L. S. Palatnik (1909–1994), Fiz. Nizk. Temp. 25, 400 (1909)], numerous investigations proved its presence in a broad variety of nonmagnetic short-range ordered materials, like structural, metallic, a-metallic, inorganic molecule, orientational, electron glasses, water, ice, carbons, and others. It was manifested by phase transitions between amorphous states as a function of the quench condition and under compression, mediated by long-wave fluctuations of an order parameter. There has been much recent discussion given to the phenomenon of polyamorphism where distinct, different states of amorphous liquids and solids are observed as a function of density. The outstanding contribution of the recently late [A. Sella, et al. (1956–2022), Nat. Mater. 21, 490 (2022)],2 in the field should be recognized here. Underlying this phenomenon is the possibility of a first-order liquid-liquid phase transition driven by the density and entropy differences between the two amorphous phases. Magnetic boost of multilayer graphene under pressure was also recently discovered. Their famous spin counterparts, such as spin liquid, spin ice, and spin glass have been less studied at this end despite numerous similarities, registered so far. Taking that in mind, for further polyamorphism platform development, we demonstrate the signatures of phase transition in spin glass, driven by a magnetic field, and eventually, a novel type of polyamorphism, the spin-glass one.","PeriodicalId":18077,"journal":{"name":"Low Temperature Physics","volume":"57 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141742017","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

About splitting of energy gap in superfluid neutron matter with spin-triplet anisotropic p-wave pairing at nuclear and supranuclear densities in superstrong magnetic fields 关于超流体中子物质在超强磁场中核密度和超核密度下自旋-三重各向异性 p 波配对的能隙分裂问题

IF 0.8 4区物理与天体物理

Low Temperature Physics Pub Date : 2024-07-19 DOI: 10.1063/10.0026245

A. N. Tarasov

{"title":"About splitting of energy gap in superfluid neutron matter with spin-triplet anisotropic p-wave pairing at nuclear and supranuclear densities in superstrong magnetic fields","authors":"A. N. Tarasov","doi":"10.1063/10.0026245","DOIUrl":"https://doi.org/10.1063/10.0026245","url":null,"abstract":"The nonlinear integral equations for the components of the order parameter of dense superfluid neutron matter (SNM) with spin-triplet anisotropic p-wave pairing (similar to pairing in 3He−A2 in magnetic fields, i.e., with spin S = 1 and orbital moment L = 1 of anisotropic Cooper pairs of neutrons) in superstrong magnetic fields (exceeding the 1017 G) are solved analytically in the limit of zero temperature. These solutions are derived for the family of so-called BSk-type generalized parameterizations of the effective Skyrme forces (with three terms dependent on density n) in neutron matter. The obtained general solutions for splitting of energy gap in SNM in superstrong magnetic fields are specified for the generalized BSk21 parameterization of the effective Skyrme forces at nuclear density n0 = 0.17 fm–3 and at two supranuclear densities n = 1.25n0 and n = 1.5n0 for magnetic fields H = Z⋅1017 G, where 1≤ Z ≤ 10. The main results are the splitting of energy gap and its asymmetry which increase nonlinearly with growing both superstrong magnetic field H and supranuclear density n &gt; n0. Such effects in SNM might exist in liquid outer core (at densities n&gt;∼⁡n0) in strongly magnetized neutron stars known as “magnetars”.","PeriodicalId":18077,"journal":{"name":"Low Temperature Physics","volume":"46 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141742024","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

Computer simulation of the density of states and band structure of NaF nanotubes NaF 纳米管的状态密度和能带结构的计算机模拟

IF 0.8 4区物理与天体物理

Low Temperature Physics Pub Date : 2024-07-19 DOI: 10.1063/10.0026283

Assel Istlyaup, Lyudmila Myasnikova, Daulet Sergeyev, Marina Konuhova, Anatoli I. Popov

{"title":"Computer simulation of the density of states and band structure of NaF nanotubes","authors":"Assel Istlyaup, Lyudmila Myasnikova, Daulet Sergeyev, Marina Konuhova, Anatoli I. Popov","doi":"10.1063/10.0026283","DOIUrl":"https://doi.org/10.1063/10.0026283","url":null,"abstract":"Modern solid-state physics increasingly focuses on the study of nanomaterials and the development of nanotechnologies. Various theoretical methods and research technologies are actively used to elucidate the significance of experimental results related to the study of solid-state defects. Progress in this field is likely associated with advancements in computer technologies and the development of modern quantum-chemical packages. The obtained spectra reveal a certain number of energy levels in the energy range from –30 to 20 eV. We determine the band structure, density of states, and total energy of NaF nanotubes with parameters (m, n), where m = 4, 5, 6, 8, and n = 1, 2, 3. The characteristics modeling is conducted using the Atomistix ToolKit software package and Virtual NanoLab program. This work presents the results of computer modeling of the density of states and total energy of NaF nanotubes within the framework of density functional theory. The obtained results allow classifying the tubular structures of NaF as quantum dots and contribute to further research into alkali metal halide crystals in nanostructures.","PeriodicalId":18077,"journal":{"name":"Low Temperature Physics","volume":"84 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141742025","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

Dilatometric and refractive parameters of rubidium sulfate crystals at low temperatures 硫酸铷晶体在低温下的稀释和折射参数

IF 0.8 4区物理与天体物理

Low Temperature Physics Pub Date : 2024-07-19 DOI: 10.1063/10.0026324

I. A. Pryshko, I. S. Novosad, Z. O. Kohut, V. M. Salapak, O. M. Horina

{"title":"Dilatometric and refractive parameters of rubidium sulfate crystals at low temperatures","authors":"I. A. Pryshko, I. S. Novosad, Z. O. Kohut, V. M. Salapak, O. M. Horina","doi":"10.1063/10.0026324","DOIUrl":"https://doi.org/10.1063/10.0026324","url":null,"abstract":"The temperature changes of the relative elongation (Δl/l0)i and refractive indices ni(T) of rubidium sulfate crystals in the region of low temperatures are investigated in the work. The linear dimensions and volume of the crystal decrease with a decrease in temperature, and the parameters (Δl/l0)i are anisotropic. The values of ni increase with decreasing temperature for all crystal physical directions, and the intersection of the curves nz(T) and nx(Т) at a temperature of Т = 85 K occurs. This indicates the existence of an optical isotropic point in this crystal, which is confirmed by independent temperature measurements of the angle between the optical axes. It is shown that rubidium sulfate crystals are optically biaxial, with the angle between the optical axes equal 2 V = 41.5° at room temperature. With decreasing temperature, it decreases almost linearly, so that at Т = 85 K the crystal changes from optically biaxial to optically uniaxial (2 V = 0°). The temperature changes of the values of electronic polarizability αi were calculated. It was shown that αi increases slightly as temperature decrease, so that in the region where the optical isotropic point exists, the values αх and αz are equal to each other.","PeriodicalId":18077,"journal":{"name":"Low Temperature Physics","volume":"338 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141742018","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

Ground state of the spin-1/2 Ising–Heisenberg distorted diamond chain with ferromagnetic Ising and antiferromagnetic Heisenberg interactions 具有铁磁性伊辛和反铁磁性海森堡相互作用的自旋-1/2 伊辛-海森堡扭曲金刚石链的基态

IF 0.8 4区物理与天体物理

Low Temperature Physics Pub Date : 2024-07-19 DOI: 10.1063/10.0026258

B. M. Lisnyi

引用次数: 0

Features of temperature dependences electrical resistance of Bi88.08Mn11.92 in magnetic fields 磁场中 Bi88.08Mn11.92 电阻的温度相关性特征

IF 0.8 4区物理与天体物理

Low Temperature Physics Pub Date : 2024-07-19 DOI: 10.1063/10.0026270

A. V. Terekhov, K. Rogacki, V. M. Yarovyi, Z. D. Kovalyuk, E. Lähderanta, E. V. Khristenko, A. L. Solovjov

{"title":"Features of temperature dependences electrical resistance of Bi88.08Mn11.92 in magnetic fields","authors":"A. V. Terekhov, K. Rogacki, V. M. Yarovyi, Z. D. Kovalyuk, E. Lähderanta, E. V. Khristenko, A. L. Solovjov","doi":"10.1063/10.0026270","DOIUrl":"https://doi.org/10.1063/10.0026270","url":null,"abstract":"The temperature dependences of the electrical resistance of the solid solution of Bi88.08Mn11.92 in the temperature range of 2–300 K and magnetic fields up to 90 kOe for both H ⊥ I and H || I are studied. It has been shown that in a magnetic field, the temperature dependences of the electrical resistance of Bi88.08Mn11.92 show maxima (insulator–metal transition) for both the H ⊥ I and H || I orientations. The temperatures of the maxima increase with increasing field. The appearance of a noticeable difference between the temperature dependences of the electrical resistances of Bi88.08Mn11.92 and the compound Bi95.69Mn3.69Fe0.62 with a lower Mn content and pure Bi is discussed. It has been established that the magnetoresistance of Bi88.08Mn11.92 is positive over the entire temperature range studied and reaches a value of 3290% in a magnetic field of 90 kOe for H ⊥ I, which is approximately 400% higher than in the Bi95.69Mn3.69Fe0.62 compound with lower Mn content. A suggestion has been made that the peculiarities temperature dependences behavior of the electrical resistance of Bi88.08Mn11.92 without a magnetic field and in the field, are largely due to the influence of internal magnetism of the α-BiMn phase and can be explained within the framework of the multiband theory.","PeriodicalId":18077,"journal":{"name":"Low Temperature Physics","volume":"38 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141742026","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

Computational and spectroscopic comparative analysis of Raman phonon spectra of LiNiPO4 磷酸镍锂拉曼声子谱的计算和光谱对比分析

IF 0.8 4区物理与天体物理

Low Temperature Physics Pub Date : 2024-07-19 DOI: 10.1063/10.0026325

A. V. Peschanskii, A. Yu. Glamazda

引用次数: 0

The influence of zirconium dioxide nanoadditives on the properties of mullite-corundum 二氧化锆纳米添加剂对莫来石-刚玉特性的影响

IF 0.8 4区物理与天体物理

Low Temperature Physics Pub Date : 2024-07-19 DOI: 10.1063/10.0026282

V. P. Nerubatskyi, E. S. Hevorkian, R. V. Vovk, Z. Krzysiak, H. L. Komarova

{"title":"The influence of zirconium dioxide nanoadditives on the properties of mullite-corundum","authors":"V. P. Nerubatskyi, E. S. Hevorkian, R. V. Vovk, Z. Krzysiak, H. L. Komarova","doi":"10.1063/10.0026282","DOIUrl":"https://doi.org/10.1063/10.0026282","url":null,"abstract":"The paper analyzes the effect of nanoadditives of zirconium dioxide, partially stabilized by Y2O3, on the Al2O3–SiO2 matrix during hot pressing by the electroconsolidation method. The microstructure obtained at different compositions and sintering modes is studied. It was established that the introduction of nanopowder ZrO2–3 mol % Y2O3 increases the crack resistance of sintered samples not only due to the transformation of the tetragonal phase to the monoclinic phase, but also due to the formation of a solid solution with aluminum oxide at the interphase boundaries. Starting from a temperature of 1400 °C, complete densification occurs with the formation of nonporous composites while preserving the nanostructure. At this temperature, the formation of mullite with cristobalite phases also begins. The high value of thermocycles makes it possible to use this composite material as a cryogenic one. The fabrication of mullite-corundum composites with additions of ZrO2–3 mol % Y2O3 nanopowders via the method of electrosolidification has enabled the attainment of high fracture toughness, K1C = 14.5 MPa⋅m1/2, and hardness HV10 = 14 GPa. These results evidence excellent mechanical properties, thereby expanding the potential applications of this material.","PeriodicalId":18077,"journal":{"name":"Low Temperature Physics","volume":"46 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141742054","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

Fractional quantum Hall effect of a rapidly rotating gas of ultracold bosonic atoms 快速旋转的超冷玻色原子气体的分数量子霍尔效应

IF 0.8 4区物理与天体物理

Low Temperature Physics Pub Date : 2024-07-19 DOI: 10.1063/10.0026246

M. Ahmed Ammar, S. Boucherf

引用次数: 0

Magnetic properties of YbB12. Pressure effects YbB12 的磁性能。压力效应

IF 0.8 4区物理与天体物理

Low Temperature Physics Pub Date : 2024-07-19 DOI: 10.1063/10.0026247

A. S. Panfilov, A. A. Lyogenkaya, G. E. Grechnev

引用次数: 0