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Journal of Low Temperature Physics最新文献

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Magnetic Susceptibility, Specific Heat, and Entropy of Graphene Using Non-Abelian Quantization 非阿贝尔量化石墨烯的磁化率、比热和熵
IF 1.4 3区 物理与天体物理
Journal of Low Temperature Physics Pub Date : 2025-08-27 DOI: 10.1007/s10909-025-03325-z
Xuanyu Pan, Liu Long
{"title":"Magnetic Susceptibility, Specific Heat, and Entropy of Graphene Using Non-Abelian Quantization","authors":"Xuanyu Pan,&nbsp;Liu Long","doi":"10.1007/s10909-025-03325-z","DOIUrl":"10.1007/s10909-025-03325-z","url":null,"abstract":"<div><p>A simple nonrelativistic model is proposed using a non-Abelian magnetic quantization approach. In this model, a deformed of the Heisenberg algebra is used. In the model, the commutator of momenta is considered proportional to the pseudo-spin. Due to the use of non-commutative algebra, a linear term in the momentum is appeared. By this model, the low-energy excitations of graphene are determined. The Landau problem is solved under a uniform magnetic field perpendicular to the plane. Then, the partition function is calculated for two branches: positive and negative. Finally, the thermal and magnetic properties of graphene are calculated. The results show that the magnetic susceptibility has a transition from paramagnetic to diamagnetic in each branch. The transition point depends on the temperature and magnetic field.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"221 1-6","pages":"209 - 223"},"PeriodicalIF":1.4,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230242","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}
引用次数: 0
Magnetic Confinement of a Bubble of Supercooled 3He-A 过冷3He-A气泡的磁约束
IF 1.4 3区 物理与天体物理
Journal of Low Temperature Physics Pub Date : 2025-08-27 DOI: 10.1007/s10909-025-03328-w
Luke Whitehead, Andrew Casey, Richard P. Haley, Petri J. Heikkinen, Lev V. Levitin, Adam J. Mayer, Xavier Rojas, Tineke Salmon, John Saunders, Alex Thomson, Dmitry E. Zmeev, Samuli Autti
{"title":"Magnetic Confinement of a Bubble of Supercooled 3He-A","authors":"Luke Whitehead,&nbsp;Andrew Casey,&nbsp;Richard P. Haley,&nbsp;Petri J. Heikkinen,&nbsp;Lev V. Levitin,&nbsp;Adam J. Mayer,&nbsp;Xavier Rojas,&nbsp;Tineke Salmon,&nbsp;John Saunders,&nbsp;Alex Thomson,&nbsp;Dmitry E. Zmeev,&nbsp;Samuli Autti","doi":"10.1007/s10909-025-03328-w","DOIUrl":"10.1007/s10909-025-03328-w","url":null,"abstract":"<div><p>We have designed and constructed a magnet surrounding a cylindrical volume of superfluid helium-3 to isolate a region of metastable, supercooled A phase, entirely surrounded by bulk A phase - isolating the ‘bubble’ from rough surfaces that can trigger the transition to the stable B phase. We outline the design of the experimental cell and magnet and show that the performance of the magnet is consistent with simulations, including the capability to produce the high field gradient required for generating a bubble. Future plans include the investigation of possible intrinsic mechanisms underpinning the A-B transition, with potential implications for early-universe cosmological phase transitions.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"221 1-6","pages":"249 - 255"},"PeriodicalIF":1.4,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10909-025-03328-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230243","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}
引用次数: 0
Array of Optical Transition-Edge Sensors Fabricated by Ion-Milling Process Evaluated with Microwave Multiplexer for 100 or More Sensors 离子铣削工艺制备的光学过渡边缘传感器阵列用微波多路复用器对100个或更多传感器进行了评估
IF 1.4 3区 物理与天体物理
Journal of Low Temperature Physics Pub Date : 2025-08-19 DOI: 10.1007/s10909-025-03324-0
Takahiro Kikuchi, Takeshi Jodoi, Nao Kominato, Ryota Hayakawa, Tetsuya Tsuruta, Go Fujii, Kaori Hattori, Daiji Fukuda, Fuminori Hirayama, Akira Sato
{"title":"Array of Optical Transition-Edge Sensors Fabricated by Ion-Milling Process Evaluated with Microwave Multiplexer for 100 or More Sensors","authors":"Takahiro Kikuchi,&nbsp;Takeshi Jodoi,&nbsp;Nao Kominato,&nbsp;Ryota Hayakawa,&nbsp;Tetsuya Tsuruta,&nbsp;Go Fujii,&nbsp;Kaori Hattori,&nbsp;Daiji Fukuda,&nbsp;Fuminori Hirayama,&nbsp;Akira Sato","doi":"10.1007/s10909-025-03324-0","DOIUrl":"10.1007/s10909-025-03324-0","url":null,"abstract":"<div><p>The optical transition-edge sensor (TES) pushes the boundary on fault-tolerant photonic quantum computers and low-invasive bio-imaging systems. As these systems evolve, there is an increasing demand for using a TES array comprising many sensors, often exceeding one hundred. Critical temperature <span>(T_c)</span> of the TESes should be uniform to ensure that all TESes operate at the same bias point with a series-bias current. Using an ion-milling process, we fabricate new titanium-based TES arrays consisting of 40 TESes. Each TES has lateral dimensions of 15 µm <span>(times )</span> 13 µm. Our microwave-multiplexing measurement with rf-SQUIDs confirms that 24 out of the 40 TESes exhibit <span>(T_textrm{c} = (336 pm 6),textrm{mK})</span> uniform enough to apply the common bias. The yield is still 60%; however, this is the first report on the <span>(T_textrm{c})</span> uniformity of the ion-milling-based TESes. Seven optical fibers are connected to TESes. Five out of the seven sensors show transition. They show energy resolution <span>(0.54 le {Delta }E,(textrm{eV}) le 0.62)</span> without FRM. The best energy resolution achieved without flux ramp modulation is 0.54 eV for a signal at 0.80 eV.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"221 1-6","pages":"199 - 208"},"PeriodicalIF":1.4,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230230","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}
引用次数: 0
Novel Experimental Platform to Realize One-dimensional Quantum Fluids 实现一维量子流体的新实验平台
IF 1.4 3区 物理与天体物理
Journal of Low Temperature Physics Pub Date : 2025-08-15 DOI: 10.1007/s10909-025-03329-9
Stephanie McNamara, Prabin Parajuli, Sutirtha Paul, Garfield Warren, Adrian Del Maestro, Paul E. Sokol
{"title":"Novel Experimental Platform to Realize One-dimensional Quantum Fluids","authors":"Stephanie McNamara,&nbsp;Prabin Parajuli,&nbsp;Sutirtha Paul,&nbsp;Garfield Warren,&nbsp;Adrian Del Maestro,&nbsp;Paul E. Sokol","doi":"10.1007/s10909-025-03329-9","DOIUrl":"10.1007/s10909-025-03329-9","url":null,"abstract":"<div><p>Templated porous materials like MCM-41 offer a scalable platform for studying one-dimensional quantum fluids due to their uniform structure. However, achieving true 1D helium behavior is limited by pore sizes typically larger than helium’s coherence length. Building on prior work using Ar preplating to reduce pore size and soften adsorption potentials, we propose a novel approach: preplating MCM-41 with cesium (Cs). Cs’s large atomic radius and non-wetting interaction with helium create an ideal confinement environment. Preliminary adsorption isotherms and small-angle X-ray scattering data confirm reduced pore radii, supporting the potential for realizing 1D <sup>4</sup>He quantum fluids in Cs-preplated MCM-41.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"221 1-6","pages":"256 - 264"},"PeriodicalIF":1.4,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10909-025-03329-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230492","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}
引用次数: 0
A Quantum Analysis Model for the Irreversible Thermoacoustic Refrigerator Under the Condition of Weak Gas Degeneracy 弱气体简并条件下不可逆热声制冷机的量子分析模型
IF 1.4 3区 物理与天体物理
Journal of Low Temperature Physics Pub Date : 2025-08-14 DOI: 10.1007/s10909-025-03327-x
Qing E, Feng Wu, Xiaojiang Ye, Ting Chen
{"title":"A Quantum Analysis Model for the Irreversible Thermoacoustic Refrigerator Under the Condition of Weak Gas Degeneracy","authors":"Qing E,&nbsp;Feng Wu,&nbsp;Xiaojiang Ye,&nbsp;Ting Chen","doi":"10.1007/s10909-025-03327-x","DOIUrl":"10.1007/s10909-025-03327-x","url":null,"abstract":"<div><p>The performance of the micro thermoacoustic refrigerator under the condition of weak gas degeneracy is studied, and a new analysis model for an irreversible quantum thermoacoustic refrigerator is established in this paper. Based on quantum statistics and thermodynamics theory, some important performance parameters of the thermoacoustic refrigerator such as the dimensionless cooling rate and the Coefficient of Performance (COP) are derived with the new model. Through numerical examples, the method to optimize the performance by adjusting some operation or structure parameters is given. At the same time, a new method to select the length of the regenerator is also found.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"221 1-6","pages":"233 - 248"},"PeriodicalIF":1.4,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230456","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}
引用次数: 0
Magnetocaloric Properties of The Spin-2 Blume–Capel Model With Second Nearest Neighbor Interaction 具有第二近邻相互作用的自旋-2 Blume-Capel模型的磁热学性质
IF 1.4 3区 物理与天体物理
Journal of Low Temperature Physics Pub Date : 2025-08-13 DOI: 10.1007/s10909-025-03323-1
M. Salama, H. Saadi, H. Kerrai, E. M. Jalal, M. El Bouanounou, E. B. Choubabi, M. El Bouziani
{"title":"Magnetocaloric Properties of The Spin-2 Blume–Capel Model With Second Nearest Neighbor Interaction","authors":"M. Salama,&nbsp;H. Saadi,&nbsp;H. Kerrai,&nbsp;E. M. Jalal,&nbsp;M. El Bouanounou,&nbsp;E. B. Choubabi,&nbsp;M. El Bouziani","doi":"10.1007/s10909-025-03323-1","DOIUrl":"10.1007/s10909-025-03323-1","url":null,"abstract":"<div><p>In this work, we investigate the magnetic, magnetocaloric, and hysteresis properties of the Spin-2 Blume–Capel model with second nearest neighbor interaction, which is a good candidate for exploring the magnetic properties of the compound LaMnO<sub>3</sub>, within the mean-field approximation. The Hamiltonian considered includes exchange interactions between first and second neighbors (<span>(J_1)</span> and <span>(J_2)</span>), the crystal field <i>D</i>, and an external magnetic field <i>h</i>. Phase diagrams reveal the presence of a tricritical point separating first- and second-order transitions. The magnetization shows a second-order transition in the absence of the external magnetic field and a transition to a superparamagnetic phase for <span>(h/J_{2} ne 0)</span>. The magnetic entropy <span>(-Delta S_m)</span> increases with field strength, reaching a maximum of 0.272 for <span>(h/J_2 = 5)</span>, while the relative cooling power (RCP) increases linearly. Finally, the system exhibits complex hysteresis behavior, with one, three, or four loops depending on the physical parameters considered. These results highlight the potential of the compound <span>(hbox {LaMnO}_3)</span> for magnetic refrigeration applications.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"221 1-6","pages":"184 - 198"},"PeriodicalIF":1.4,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230439","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}
引用次数: 0
Sign Change of Faraday Rotation in Uniaxially Strained Weyl Semi-metals 单向应变Weyl半金属中法拉第旋转的符号变化
IF 1.4 3区 物理与天体物理
Journal of Low Temperature Physics Pub Date : 2025-08-06 DOI: 10.1007/s10909-025-03326-y
J. Shokoohi, K. Jamshidi-Ghaleh, A. A. Phirouznia
{"title":"Sign Change of Faraday Rotation in Uniaxially Strained Weyl Semi-metals","authors":"J. Shokoohi,&nbsp;K. Jamshidi-Ghaleh,&nbsp;A. A. Phirouznia","doi":"10.1007/s10909-025-03326-y","DOIUrl":"10.1007/s10909-025-03326-y","url":null,"abstract":"<div><p>Faraday rotation of Weyl fermions under uniaxial strain has been investigated in which the tight-binding Hamiltonian and Kubo approach have been employed. The influence of the strain has been considered as a change of hopping parameter. Results show that the Faraday rotation angle can be controlled by the external strain. Meanwhile, results show that the sign of the Faraday rotation can be reversed at some ranges of strain and incident light frequency.\u0000</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"221 1-6","pages":"224 - 232"},"PeriodicalIF":1.4,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230486","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}
引用次数: 0
The Compressibility at Unitarity: A Superfluid Signature in Trapped Ultracold Fermi Gases 统一性处的可压缩性：捕获超冷费米气体中的超流体特征
IF 1.4 3区 物理与天体物理
Journal of Low Temperature Physics Pub Date : 2025-07-29 DOI: 10.1007/s10909-025-03318-y
D. K. Watson
{"title":"The Compressibility at Unitarity: A Superfluid Signature in Trapped Ultracold Fermi Gases","authors":"D. K. Watson","doi":"10.1007/s10909-025-03318-y","DOIUrl":"10.1007/s10909-025-03318-y","url":null,"abstract":"<div><p>The behavior of the thermodynamic compressibility of a trapped ultracold Fermi gas at unitarity is explored as the temperature approaches the critical temperature and the gas undergoes a phase transition to a superfluid state. This phase transition offers an opportunity to probe the microscopic underpinnings of this transition and can serve as a test of theoretical approaches. In this study, the collective behavior of the gas as it undergoes this phase transition is described using normal modes. The Pauli principle is applied “on paper” using specific normal mode assignments that are consistent with this fundamental principle. This study finds a small signature of the transition at the critical temperature in contrast to previous experimental and theoretical results.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"221 1-6","pages":"108 - 128"},"PeriodicalIF":1.4,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230332","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}
引用次数: 0
First-Principles Study on the Structure and Electronic Structure of K and P-Doped Iron-Based Superconductor BaFe2As2 K和p掺杂铁基超导体BaFe2As2结构和电子结构的第一性原理研究
IF 1.4 3区 物理与天体物理
Journal of Low Temperature Physics Pub Date : 2025-07-25 DOI: 10.1007/s10909-025-03322-2
Li Li, Zhihua Zhang, Ming He, Long Lin, Yan Cui, Hualong Tao, Weifang Wang, Hongli Wang, Dongfang Jia, Ying Gao, Juan Li, Sheng Zhan, Peihan Yu, Yufen Feng, Huijie Ren, Shuyue Qin, Rubing Zhang, Yuxuan Song, Jingyi Shi
{"title":"First-Principles Study on the Structure and Electronic Structure of K and P-Doped Iron-Based Superconductor BaFe2As2","authors":"Li Li,&nbsp;Zhihua Zhang,&nbsp;Ming He,&nbsp;Long Lin,&nbsp;Yan Cui,&nbsp;Hualong Tao,&nbsp;Weifang Wang,&nbsp;Hongli Wang,&nbsp;Dongfang Jia,&nbsp;Ying Gao,&nbsp;Juan Li,&nbsp;Sheng Zhan,&nbsp;Peihan Yu,&nbsp;Yufen Feng,&nbsp;Huijie Ren,&nbsp;Shuyue Qin,&nbsp;Rubing Zhang,&nbsp;Yuxuan Song,&nbsp;Jingyi Shi","doi":"10.1007/s10909-025-03322-2","DOIUrl":"10.1007/s10909-025-03322-2","url":null,"abstract":"<div><p>In the process of 25% K and 12.5% P-doped BaFe<sub>2</sub>As<sub>2</sub>, the decrease of Fe ions height is accompanied by the suppression of antiferromagnetic order. Both K and P-doping cause an increase in the distance between Fe–As layers and a contraction of Fe–As bonds, and the contraction of Fe–As bond seems to be one of the most sensitive factors affecting antiferromagnetic suppression. It is found that the contraction of Fe–As bonds tends to be coordinated with an increase in Fe–Fe average distance to ultimately suppress antiferromagnetism to a smaller value. Similar structural changes result in K/P-doping causing Lifshitz transition (LT) and electronic topological transition (ETT). At the Fermi level, K-doping increases the density of states of Fe 3<i>d</i> and As 4<i>p</i>, while P-doping reduces these values.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"221 1-6","pages":"172 - 183"},"PeriodicalIF":1.4,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230537","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}
引用次数: 0
Rotating Effects on Thermomagnetic Properties of a Two-Dimensional GaAs Quantum Ring 旋转对二维GaAs量子环热磁特性的影响
IF 1.4 3区 物理与天体物理
Journal of Low Temperature Physics Pub Date : 2025-07-21 DOI: 10.1007/s10909-025-03314-2
Ahmad Ghanbari
{"title":"Rotating Effects on Thermomagnetic Properties of a Two-Dimensional GaAs Quantum Ring","authors":"Ahmad Ghanbari","doi":"10.1007/s10909-025-03314-2","DOIUrl":"10.1007/s10909-025-03314-2","url":null,"abstract":"<div><p>This study presents a computational investigation of the rotating effects on the thermomagnetic properties of a charged particle confined to a two-dimensional quantum ring with the Aharonov–Bohm flux and external magnetic field. To this end, we have considered the Schrödinger equation (SE) including the gauge field for the rotating process and the potential model of the electromagnetic field. By solving the SE, we have calculated the eigenvalues and eigenfunctions of the system. Using obtained eigenvalues, we have evaluated the partition function of the considered system and have deduced thermodynamic properties such as mean energy, specific heat in constant volume, entropy and free energy. Also, we have calculated magnetic properties of the system such as the magnetization and magnetic susceptibility of the charged particle. Our findings represents that the rotation has a significant effect on thermodynamic and magnetic properties of a 2D quantum ring.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"221 1-6","pages":"51 - 65"},"PeriodicalIF":1.4,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230322","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}
引用次数: 0
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