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Temperature effect and Rashba effect of polaron in a parabolic quantum well 抛物线量子阱中极子的温度效应和拉什巴效应
IF 0.8 4区 物理与天体物理
Low Temperature Physics Pub Date : 2024-02-22 DOI: 10.1063/10.0024330
Shu-Ping Shan
{"title":"Temperature effect and Rashba effect of polaron in a parabolic quantum well","authors":"Shu-Ping Shan","doi":"10.1063/10.0024330","DOIUrl":"https://doi.org/10.1063/10.0024330","url":null,"abstract":"Using Tokuda’s improved linear combination operator method and variational technique, the expression of the polaron effective mass in an parabolic quantum well is derived. Due to the spin-orbit interaction, the effective mass of polaron splits into two branches. The dependence of effective mass on temperature and mean number phonons is discussed by numerical calculation. The effective mass of polaron is an increasing function of temperature and mean number phonons. The absolute value of total spin splitting effective mass increases with the increase in temperature and spin-orbit coupling parameter, and decreases with the increase in velocity. Due to the heavy hole characteristic, the spin splitting effective mass is negative.","PeriodicalId":18077,"journal":{"name":"Low Temperature Physics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139946197","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
Dynamics of magnetic vortices in the field of local inhomogeneity of a ferromagnet 铁磁体局部不均匀磁场中的磁涡旋动力学
IF 0.8 4区 物理与天体物理
Low Temperature Physics Pub Date : 2024-02-22 DOI: 10.1063/10.0024322
A. S. Kovalev
{"title":"Dynamics of magnetic vortices in the field of local inhomogeneity of a ferromagnet","authors":"A. S. Kovalev","doi":"10.1063/10.0024322","DOIUrl":"https://doi.org/10.1063/10.0024322","url":null,"abstract":"The rotation of a magnetic vortex in a ferromagnet with a local smooth change in the exchange interaction is considered. The frequency of this precession is found for all distances of the vortex from defect center. The rotation velocity of the vortex nonmonotonically depends on the distance to the center, reaching a maximum at a distance of the order of the characteristic dimension of the defect. The decrease in velocity at large distances agrees with the data known in the literature. Accounting of attenuation leads to the vortex escape the defect or falling onto it along a logarithmic spiral.","PeriodicalId":18077,"journal":{"name":"Low Temperature Physics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139946314","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
The energy spectrum and magnetization profile of the decorated spin ladder systems 装饰自旋梯系统的能谱和磁化曲线
IF 0.8 4区 物理与天体物理
Low Temperature Physics Pub Date : 2024-02-22 DOI: 10.1063/10.0024327
V. O. Cheranovskii, E. V. Ezerskaya, S. Ye. Kononenko
{"title":"The energy spectrum and magnetization profile of the decorated spin ladder systems","authors":"V. O. Cheranovskii, E. V. Ezerskaya, S. Ye. Kononenko","doi":"10.1063/10.0024327","DOIUrl":"https://doi.org/10.1063/10.0024327","url":null,"abstract":"The peculiarities of the energy spectrum of the decorated mixed spin two-leg ladder system having three spin unit cells have been studied by the perturbation theory in the limit of dominant spin coupling in ladder rungs. It is shown, that despite the singlet ground state, this spin ladder may have an intermediate plateau in a low-temperature magnetization profile. The existence of a similar plateau was shown also in the case of some intermediate values of coupling parameters by means of exact diagonalization study of small ladder clusters and by the density-matrix renormalization group calculations. We also found that the Ising type of interactions in ladder rungs may lead to the disappearance of the above intermediate magnetization plateau for the corresponding isotropic spin ladder.","PeriodicalId":18077,"journal":{"name":"Low Temperature Physics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139946179","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
Dynamical characteristics of inhomogeneous molecular aggregates 非均质分子聚集体的动力学特征
IF 0.8 4区 物理与天体物理
Low Temperature Physics Pub Date : 2024-02-22 DOI: 10.1063/10.0024331
I. Yu. Ropakova, A. A. Zvyagin
{"title":"Dynamical characteristics of inhomogeneous molecular aggregates","authors":"I. Yu. Ropakova, A. A. Zvyagin","doi":"10.1063/10.0024331","DOIUrl":"https://doi.org/10.1063/10.0024331","url":null,"abstract":"The dynamical characteristics of one-dimensional molecular aggregate with the randomness in exciton hopping is considered. We show that the randomness of the distribution of signs of the exciton hopping of the aggregate dramatically changes the dynamical characteristics. In the homogeneous case, the dynamical characteristics of the molecular aggregate manifest narrow lines at edges of the band of Frenkel excitons of the aggregate. On the other hand, we show that the considered randomness yields nonzero contributions to the dynamical characteristics of all excitons of the band.","PeriodicalId":18077,"journal":{"name":"Low Temperature Physics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139945923","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
The effect of hydrogenation on the electrophysics and magnetic characteristics of dysprosium 氢化对镝的电物理和磁特性的影响
IF 0.8 4区 物理与天体物理
Low Temperature Physics Pub Date : 2024-02-22 DOI: 10.1063/10.0024323
V. I. Sokolenko, A. O. Chupikov, M. M. Pylypenko, M. B. Lazareva, O. Yu. Roskoshna
{"title":"The effect of hydrogenation on the electrophysics and magnetic characteristics of dysprosium","authors":"V. I. Sokolenko, A. O. Chupikov, M. M. Pylypenko, M. B. Lazareva, O. Yu. Roskoshna","doi":"10.1063/10.0024323","DOIUrl":"https://doi.org/10.1063/10.0024323","url":null,"abstract":"The effect of hydrogenation from the gas phase on the change in the character of the temperature dependence of the electrical resistivity ρ(T) in the range of 77–300 K and the temperatures of phase magnetic transformations (Curie temperature TC and Néel temperature TN) of dysprosium was studied. It follows from the experimental data and their analysis that, within the framework of the indirect exchange ideas, the decreases in TC, TN and the contribution to ρ(T) related to electron scattering in the paramagnetic phase are interrelated. It has been suggested that hydrogenation effects may be related to changes in microscopic parameters: a decrease in the density of states at the Fermi level, an increase in the Fermi energy, and a decrease in the effective mass of carriers and the s-f exchange parameter.","PeriodicalId":18077,"journal":{"name":"Low Temperature Physics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139945975","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
Low-temperature magnetic field behavior of elastic modules in UTe2 碲化镉弹性模块的低温磁场行为
IF 0.8 4区 物理与天体物理
Low Temperature Physics Pub Date : 2024-02-22 DOI: 10.1063/10.0024324
A. A. Zvyagin, G. A. Zvyagina
{"title":"Low-temperature magnetic field behavior of elastic modules in UTe2","authors":"A. A. Zvyagin, G. A. Zvyagina","doi":"10.1063/10.0024324","DOIUrl":"https://doi.org/10.1063/10.0024324","url":null,"abstract":"The theory for the low-temperature behavior of sound velocities (and related elastic modules) in the external magnetic field in UTe2 is proposed. The theory is based on the dual model. The model takes into account 5f2 electrons of U ions: both itinerant electrons (part of which form pairs, responsible for the superconductivity) and localized ones. The theory explains the metamagnetic-like jumps in the magnetic field observed at low temperature in UTe2.","PeriodicalId":18077,"journal":{"name":"Low Temperature Physics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139945921","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
Short notes: Measurements on the heat capacity of thermal reduced graphene oxide down to 0.3 K 简要说明：测量热还原氧化石墨烯的热容量（低至 0.3 K
IF 0.8 4区 物理与天体物理
Low Temperature Physics Pub Date : 2024-02-22 DOI: 10.1063/10.0024332
V. V. Sumarokov, A. V. Dolbin, A. Jeżowski, D. Szewczyk, D. Gnida, N. A. Vinnikov, M. I. Bagatskii
{"title":"Short notes: Measurements on the heat capacity of thermal reduced graphene oxide down to 0.3 K","authors":"V. V. Sumarokov, A. V. Dolbin, A. Jeżowski, D. Szewczyk, D. Gnida, N. A. Vinnikov, M. I. Bagatskii","doi":"10.1063/10.0024332","DOIUrl":"https://doi.org/10.1063/10.0024332","url":null,"abstract":"The specific heat of thermally reduced graphene oxide (trGO) was measured by a thermal relaxation method in the temperature range from 0.3 to 275 K. It was found that the temperature dependence of the heat capacity С(Т)/T vs T2 of trGO is nonmonotonic. It has been established that in the temperature range of 0.3–6 K there is an anomalous behavior of the temperature dependence of the heat capacity trGO, sharply changing its character. It is assumed that this anomaly is due to the influence of impurities and defects, structural features.","PeriodicalId":18077,"journal":{"name":"Low Temperature Physics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139946176","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
Double quantum dot spin resonances with a time-dependent spin-orbit coupling 具有随时间变化的自旋轨道耦合的双量子点自旋共振
IF 0.8 4区 物理与天体物理
Low Temperature Physics Pub Date : 2024-02-22 DOI: 10.1063/10.0024326
G. Giavaras
{"title":"Double quantum dot spin resonances with a time-dependent spin-orbit coupling","authors":"G. Giavaras","doi":"10.1063/10.0024326","DOIUrl":"https://doi.org/10.1063/10.0024326","url":null,"abstract":"Two-spin resonances in double quantum dots with a constant spin-orbit coupling (SOC) can be induced by an ac field which periodically modulates the energy detuning. But a large ac field amplitude may unintentionally trigger an ac modulation in the SOC, which in turn can alter the frequency of the resonances and the form of the current peaks. Here, we demonstrate that depending on the applied magnetic field and the double quantum dot parameters a weak time dependence in the SOC can have a completely different effect on the resonant peaks; in particular, it can enhance the peaks, but it can also completely suppress them.","PeriodicalId":18077,"journal":{"name":"Low Temperature Physics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139945925","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
Luminescent monitoring the state of dichroic complexes in polaroids based on polyvinyl alcohol 用荧光监测基于聚乙烯醇的偏光片中二色性复合物的状态
IF 0.8 4区 物理与天体物理
Low Temperature Physics Pub Date : 2024-01-11 DOI: 10.1063/10.0023886
A. V. Tyurin, S. A. Zhukov, A. Yu. Akhmerov
{"title":"Luminescent monitoring the state of dichroic complexes in polaroids based on polyvinyl alcohol","authors":"A. V. Tyurin, S. A. Zhukov, A. Yu. Akhmerov","doi":"10.1063/10.0023886","DOIUrl":"https://doi.org/10.1063/10.0023886","url":null,"abstract":"In this work, to control the content of dichroic complexes in film polarizers based on polyvinyl alcohol, a luminescent technique is proposed that allows us to estimate: the ratio of molecular and paired iodine centers in H-type polarizers at T = 4.2 K; of dichroic complexes caused by molecular and aggregated forms of the dye in L-type polarizers at T = 300 K. The use of this technique will make it possible in the future to establish the dependence of the properties of polarizers on the structure of dichroic complexes, not only in H-type or L-type film polarizers but also in mixed (H + L)-type polarizers, to create polarizers of various spectral ranges.","PeriodicalId":18077,"journal":{"name":"Low Temperature Physics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139459558","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
Reduction of g2(0) value in heralded spontaneous parametric down-conversion sources using photon number resolving detectors 利用光子数解析探测器降低预示自发参量下转换源中的 g2(0) 值
IF 0.8 4区 物理与天体物理
Low Temperature Physics Pub Date : 2024-01-11 DOI: 10.1063/10.0023887
C. Bruscino, M. Ejrnaes, P. Ercolano, D. Salvoni, C. Zhang, H. Li, L. You, L. Parlato, G. P. Pepe
{"title":"Reduction of g2(0) value in heralded spontaneous parametric down-conversion sources using photon number resolving detectors","authors":"C. Bruscino, M. Ejrnaes, P. Ercolano, D. Salvoni, C. Zhang, H. Li, L. You, L. Parlato, G. P. Pepe","doi":"10.1063/10.0023887","DOIUrl":"https://doi.org/10.1063/10.0023887","url":null,"abstract":"Single Photon Sources (SPSs) play a pivotal role in fields such as quantum communication and quantum cryptography by generating information in a secure manner. However, realizing the ideal emission of single photons with high efficiency is still a theoretical model. This leads to the presence of multiphoton components in SPSs, which could potentially compromise security. This study focuses on enhancing the purity of a class of sources by characterizing their photon number distribution and mitigating the impact of the multiphoton components. We propose the use of Photon Number Resolving Detectors (PNRD) as a technique to exclude multiphoton contributions, particularly in sources like Spontaneous Parametric Down Conversion sources, where emitted photons can be represented as Two-Mode Squeezed Vacuum states. By analyzing the second-order cross-correlation function, g2(0), using either PNRD or Single Photon Detectors, we can quantify the reduction in multiphoton contributions.","PeriodicalId":18077,"journal":{"name":"Low Temperature Physics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139459804","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
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