Low Temperature Physics最新文献_第4页

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

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Phonon hydrodynamics in bulk insulators and semimetals 块状绝缘体和半金属中的声子流体力学

IF 0.8 4区物理与天体物理

Low Temperature Physics Pub Date : 2024-07-19 DOI: 10.1063/10.0026323

Yo Machida, Valentina Martelli, Alexandre Jaoui, Benoît Fauqué, Kamran Behnia

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Electron transport through degenerate electron level in single-molecular junction in the presence of electron-vibrational coupling and attractive electron-electron correlations 在电子振动耦合和有吸引力的电子-电子关联存在的情况下，通过单分子结中的退化电子水平进行电子传输

IF 0.8 4区物理与天体物理

Low Temperature Physics Pub Date : 2024-05-01 DOI: 10.1063/10.0025624

E. A. Ponezha

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Unusual heat transfer dependence on boundary scattering in very long narrow conductors 超长窄导体中边界散射对传热的异常依赖性

IF 0.8 4区物理与天体物理

Low Temperature Physics Pub Date : 2024-05-01 DOI: 10.1063/10.0025618

J. Amrit, Ye. Nemchenko, K. Nemchenko, I. Kudryavtsev, S. Rogova, M. Spotar, T. Vikhtinskaya

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Temperature dependences of thermal conductivity of solid heterogeneous crystalline and amorphous materials: An empirical approach to the description in the high-temperature region 固态异质结晶和非晶材料热导率的温度依赖性：描述高温区的经验方法

IF 0.8 4区物理与天体物理

Low Temperature Physics Pub Date : 2024-05-01 DOI: 10.1063/10.0025621

Y. Horbatenko, V. Sagan, O. A. Korolyuk, O. O. Romantsova, A. Krivchikov

{"title":"Temperature dependences of thermal conductivity of solid heterogeneous crystalline and amorphous materials: An empirical approach to the description in the high-temperature region","authors":"Y. Horbatenko, V. Sagan, O. A. Korolyuk, O. O. Romantsova, A. Krivchikov","doi":"10.1063/10.0025621","DOIUrl":"https://doi.org/10.1063/10.0025621","url":null,"abstract":"This paper presents a detailed analysis of the thermal conductivity behaviors exhibited by a diverse array of nanostructured materials, ranging from multilayer graphene nanocomposites to semiconductor-based nanostructures such as Bi0.5Sb1.5Te3 and In0.53Ga0.47As composites. The investigation extends to superlattices, nanowires, and hybrid nanostructures, encompassing materials like hexagonal boron nitride flakes, iron oxide nanoporous films, and organic-inorganic hybrid materials. The thermal conductivity of these materials is characterized by distinct trends, with some showcasing crystal-like behavior and others demonstrating glass-like characteristics. The analysis employs empirical expressions to discern the contributions of phonons and diffusons in crystal-like materials and incorporates Peierls contributions and Arrhenius-type terms for glass-like behavior. Noteworthy observations include deviations in fitting certain materials at lower temperatures and the identification of negative diffuson contributions in specific cases. These findings contribute to a nuanced understanding of thermal transport in nanostructured materials and have implications for applications in advanced thermal management systems and thermoelectric devices. The extracted parameters provide valuable insights for researchers exploring the thermal conductivity of diverse nanostructured materials.","PeriodicalId":18077,"journal":{"name":"Low Temperature Physics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141049924","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}

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Distribution of impurities in base-depleted region of diode temperature sensor 二极管温度传感器碱基耗尽区的杂质分布

IF 0.8 4区物理与天体物理

Low Temperature Physics Pub Date : 2024-05-01 DOI: 10.1063/10.0025635

R. R. Bebitov, O. A. Abdulkhaev, D. M. Yodgorova, D. B. Istamov, Sh. M. Kuliyev, A. A. Khakimov, A. B. Bobonazarov, A. Z. Rakhmatov

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Kinetics of the thermal decomposition of thermally reduced graphene oxide treated with a pulsed high-frequency discharge in hydrogen atmosphere 在氢气环境中用脉冲高频放电处理热还原氧化石墨烯的热分解动力学

IF 0.8 4区物理与天体物理

Low Temperature Physics Pub Date : 2024-05-01 DOI: 10.1063/10.0025619

M. Barabashko, M. Drozd, A. V. Dolbin, R. M. Basnukaeva, N. А. Vinnikov

{"title":"Kinetics of the thermal decomposition of thermally reduced graphene oxide treated with a pulsed high-frequency discharge in hydrogen atmosphere","authors":"M. Barabashko, M. Drozd, A. V. Dolbin, R. M. Basnukaeva, N. А. Vinnikov","doi":"10.1063/10.0025619","DOIUrl":"https://doi.org/10.1063/10.0025619","url":null,"abstract":"Thermal stability and the kinetics of thermal decomposition of the thermally reduced graphene oxide (TRGO) treated by a pulsed high-frequency discharge in a hydrogen atmosphere have been studied. The modified Hummers method was used for obtaining the initial graphite oxide from graphite powder. Thermal exfoliation of the graphene oxide powder has been done in vacuum conditions with a heating rate of 5–7 degrees per minute to a temperature of 300 °С. TRGO has been treated by pulsed high-frequency discharge in a hydrogen atmosphere for partial graphene hydrogenation (chemical addition of atomic hydrogen) that leads to structural changes in the carbon planes and formation of C–H sp3 bonds. The thermogravimetry analysis measurements of the mass loss have been carried from room temperature to 1000 °C in a nitrogen atmosphere with a nitrogen flow rate of 20 mL/min and different heating rates: 50, 75 100, 125, 150, and 200 K/min, respectively. Kissinger’s multiple heating rate method has been used to determine the activation energy for decomposing substances. Activation energies Ea1, Ea2, and Ea3 equal 28, 50, and 148 kJ/mol, respectively, have been compared with the energies of the activation of thermal defunctionalization of multiwalled carbon nanotubes (MWCNTs). The activation energy Ea3 = 148 kJ/mol is close to that of the thermal decomposition of anhydride functional groups in MWCNT. The value of Ea2 = 50 kJ/mol indicates the presence of the keto and hydroxy acid’s function groups on TRGO. Activation energy Ea1 = 28 kJ/mol related with all other groups including the lighter C–H bonds that destructed due to dehydrogenation of the TRGO. Obtained experimental results are useful for further proposing the kinetic model of the mechanism of the most probable reaction of TRGO decomposition.","PeriodicalId":18077,"journal":{"name":"Low Temperature Physics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141034859","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

Nonlinear phenomena in charge transport properties of a hole-doped organic spin-liquid compound 掺杂空穴的有机自旋液态化合物电荷传输特性中的非线性现象

IF 0.8 4区物理与天体物理

Low Temperature Physics Pub Date : 2024-05-01 DOI: 10.1063/10.0025620

Satoshi Yamashita, E. Yesil, Luming Zhang, Tetsuya Nomoto, Hiroki Akutsu, A. Krivchikov, Yasuhiro Nakazawa

{"title":"Nonlinear phenomena in charge transport properties of a hole-doped organic spin-liquid compound","authors":"Satoshi Yamashita, E. Yesil, Luming Zhang, Tetsuya Nomoto, Hiroki Akutsu, A. Krivchikov, Yasuhiro Nakazawa","doi":"10.1063/10.0025620","DOIUrl":"https://doi.org/10.1063/10.0025620","url":null,"abstract":"The nonlinear electric conductivity of κ-(BEDT-TTF)4Hg2.89Br8, which is known as a hole-doped spin liquid, has been observed by single crystal transport measurements using dc and ac excitations. This compound is known as a charge transfer complex with strong magnetic fluctuations accompanied by electron mass enhancement at ambient pressure. We discuss the nonlinear dc conductivity drastically emerging below 100 K. We also performed ac impedance measurements of this compound and compared the results with those of a typical dimer-Mott compound of deuterated κ-(d8-BEDT-TTF)2Cu[N(CN)2]Br, located just near the Mott boundary. The analyses of the Nyquist plots of κ-(d8-BEDT-TTF)2Cu[N(CN)2]Br and κ-(BEDT-TTF)4Hg2.89Br8 reveal qualitatively different features. The former shows a behavior pertinent to the inhomogeneous distribution of domains due to a mixing of metal and insulating phases, taking into account the influence of the proximity effect, while the doped spin liquid has a distinct semicircle-type frequency dependence in its Nyquist plot in the whole temperature range studied. We conclude that the nonlinear conductivity is intrinsically peculiar to the doped dimer Mott system, where the charge degrees of freedom dominate the itinerancy. We attribute the anomalous features, such as non-Fermi liquid behavior, heat capacity enhancement, and strong antiferromagnetic fluctuations in κ-(BEDT-TTF)4Hg2.89Br8, to a kind of charge confinement effect retained in the hole-doped spin-liquid state.","PeriodicalId":18077,"journal":{"name":"Low Temperature Physics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141029083","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

III International Advanced Research Workshop “Thermal Conductivity of Solid States at Low Temperatures” (online), Kharkiv, Ukraine October 25, 2023 第三届国际高级研究讲习班 "固体在低温下的导热性"（在线），乌克兰哈尔科夫 2023 年 10 月 25 日

IF 0.8 4区物理与天体物理

Low Temperature Physics Pub Date : 2024-05-01 DOI: 10.1063/10.0025617

Alexander Krivchikov, Alexander Dolbin, M. Barabashko, Razet Basnukaeva

引用次数: 0

Erratum: “Dynamical characteristics of inhomogeneous molecular aggregates” (Fiz. Nizk. Temp. 50, 186 (2024) [Low Temp. Phys. 50, 176 (2024)]) 勘误："不均匀分子聚集体的动力学特征"（Fiz.Nizk.Temp.50, 186 (2024) [Low Temp. Phys. 50, 176 (2024)])

IF 0.8 4区物理与天体物理

Low Temperature Physics Pub Date : 2024-05-01 DOI: 10.1063/10.0025637

I. Ropakova, A. A. Zvyagin

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