The European Physical Journal B最新文献_第2页

Modulating the electronic and optical properties of InGeF3 perovskite under pressure: a computational approach

IF 1.6 4区物理与天体物理

The European Physical Journal B Pub Date : 2025-03-18 DOI: 10.1140/epjb/s10051-025-00893-7

Mohammed Miri, Younes Ziat, Hamza Belkhanchi, Ayoub Koufi, Youssef Ait El Kadi

{"title":"Modulating the electronic and optical properties of InGeF3 perovskite under pressure: a computational approach","authors":"Mohammed Miri, Younes Ziat, Hamza Belkhanchi, Ayoub Koufi, Youssef Ait El Kadi","doi":"10.1140/epjb/s10051-025-00893-7","DOIUrl":"10.1140/epjb/s10051-025-00893-7","url":null,"abstract":"<div><p>This study explores the structural, mechanical, electronic and optical properties of InGeF<sub>3</sub> perovskite under varying pressures using density functional theory (DFT) via the Wien2k code. Elastic constants meet mechanical stability criteria at 0 GPa, with a notable improvement in ductility and hardness under pressure. Electronic analysis reveals an indirect band gap of 1.51 eV at 0 GPa, narrowing to 0.67 eV at 9 GPa, signaling a transition to metallic behavior. The density of states shows the dominance of halogens in the valence band, and significant contributions from indium and germanium in the conduction band. Optical properties, such as absorption and reflectivity, evolve under pressure, with a shift of the absorption spectrum toward lower energies. These findings demonstrate that pressure not only modifies the electronic structure of InGeF<sub>3</sub> but also enhances its optical performance, making it a potential candidate for photovoltaic applications.</p><h3>Graphical abstract</h3><p><b>a</b>) Absorption coefficient corresponding to the energy under pressure 0 GPa, 3 GPa, 6 GPa and 9 GPa for nGeF<sub><b>3</b></sub>, <b>b)</b> Conductivity versus energy under pressure 0 GPa, 3 GPa, 6 GPa and 9 GPa GPa of InGeF<sub>3</sub></p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"98 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645534","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

Theoretical and experimental studies of melting of the 1/3 magnetization plateau in a frustrated (S=1/2) antiferromagnetic trimerized quantum Heisenberg spin chain compound (hbox {Na}_2hbox {Cu}_3hbox {Ge}_4hbox {O}_{12})

IF 1.6 4区物理与天体物理

The European Physical Journal B Pub Date : 2025-03-18 DOI: 10.1140/epjb/s10051-025-00891-9

Sachin Kumar, A. K. Bera, Amit Kumar, Yurii Skourski, S. M. Yusuf

{"title":"Theoretical and experimental studies of melting of the 1/3 magnetization plateau in a frustrated (S=1/2) antiferromagnetic trimerized quantum Heisenberg spin chain compound (hbox {Na}_2hbox {Cu}_3hbox {Ge}_4hbox {O}_{12})","authors":"Sachin Kumar, A. K. Bera, Amit Kumar, Yurii Skourski, S. M. Yusuf","doi":"10.1140/epjb/s10051-025-00891-9","DOIUrl":"10.1140/epjb/s10051-025-00891-9","url":null,"abstract":"<p>We report the magnetization process of <span>(S=1/2)</span> Heisenberg antiferromagnetic <span>(J_1{-}J_1{-}J_2)</span> trimerized spin chain system (with frustration due to the next-nearest-neighbor interaction <span>(J_3)</span> within the trimer) under applied magnetic field by means of density-matrix renormalization group method. Here, <span>(J')</span>s are the antiferromagnetic exchange interaction constants. Specifically, we explore the phenomenon of 1/3 magnetization plateau for the exchange coupling ratios <span>( alpha = 0.18, beta =0.18 )</span>, and <span>(J_1=235)</span> K, where <span>(alpha =J_2/J_1)</span>, and <span>(beta =J_3/J_1)</span> as found for the model compound <span>(hbox {Na}_2hbox {Cu}_3hbox {Ge}_4hbox {O}_{12})</span>. It is found that a wide 1/3 quantum magnetization plateau state (observed in ground state magnetization) gradually disappears with increasing temperature beyond a crossover temperature <span>(T_{co})</span> due to thermal fluctuations. Based on numerical data, the width <i>w</i>(<i>T</i>) of the magnetization plateau is found to follow an exponential behave as <span>(sim e^{-B/sqrt{T_{co}-T}})</span>, where <i>B</i> is a constant and <span>(T_{co})</span> is estimated to be <span>( approx 60)</span> K. The occurrence of the 1/3 plateau is also seen through the field-induced energy gap in the energy-level spectrum of the system. The stability of the magnetization plateau state against the perturbation depends upon the size of the energy gap. Further, calculated isothermal magnetization results are compared with experimental high field magnetization data for the quasi-one-dimensional (1D) spin <span>(S=1/2)</span> trimer chain compound <span>(hbox {Na}_2hbox {Cu}_3hbox {Ge}_4hbox {O}_{12})</span>.</p>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"98 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjb/s10051-025-00891-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143638153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Chirality-induced rectification in asymmetric gear systems

IF 1.6 4区物理与天体物理

The European Physical Journal B Pub Date : 2025-03-18 DOI: 10.1140/epjb/s10051-025-00894-6

Hui-zhang Xie, Jin-ran Li

{"title":"Chirality-induced rectification in asymmetric gear systems","authors":"Hui-zhang Xie, Jin-ran Li","doi":"10.1140/epjb/s10051-025-00894-6","DOIUrl":"10.1140/epjb/s10051-025-00894-6","url":null,"abstract":"<p>We investigate the emergence of unidirectional rotation in an asymmetric gear immersed in a chiral active particle bath under periodic boundary conditions. Our results demonstrate that the nonequilibrium characteristics of self-propelled particles can drive sustained rotational motion of the gear. The study reveals that both particle chirality and gear asymmetry independently induce symmetry breaking, which collectively leads to directed rotation. The rotational direction is determined by the interplay between these two factors, and we demonstrate that the direction can be reversed through systematic parameter control. Furthermore, we identify optimal parameter combinations of particle chirality and self-propulsion speed that maximize the gear’s rotational velocity. These findings provide fundamental insights into the control of active matter systems and offer practical guidelines for experimental designs that utilize chiral active matter to transform random motion into controlled directional movement.</p><p>The study investigates the emergence of directional rotation in an asymmetric gear immersed within a sea of chiral active particles under periodic boundary conditions. We demonstrate that the inherent nonequilibrium properties of these self-propelling particles can induce consistent gear rotation. </p>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"98 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645533","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

DFT study of the novel double perovskite Sr2PrRuO6: structural, electronic, optical, magnetic, and thermoelectric properties

IF 1.6 4区物理与天体物理

The European Physical Journal B Pub Date : 2025-03-11 DOI: 10.1140/epjb/s10051-025-00887-5

Fatima Zohra Zoulikha Bellahcene, Kaddour Bencherif, Fafa Chiker, Djamel-Eddine Missoum, Djillali Bensaid

{"title":"DFT study of the novel double perovskite Sr2PrRuO6: structural, electronic, optical, magnetic, and thermoelectric properties","authors":"Fatima Zohra Zoulikha Bellahcene, Kaddour Bencherif, Fafa Chiker, Djamel-Eddine Missoum, Djillali Bensaid","doi":"10.1140/epjb/s10051-025-00887-5","DOIUrl":"10.1140/epjb/s10051-025-00887-5","url":null,"abstract":"<div><p>This study presents a comprehensive analysis of the structural, electronic, magnetic, optical, and thermoelectric properties of the double perovskite Sr<sub>2</sub>PrRuO<sub>6</sub> using density functional theory (DFT). Calculations were conducted using the full-potential linearized augmented plane wave (FP-LAPW) method, incorporating the Local Density Approximation (LDA), Generalized Gradient Approximation (GGA), and the Tran–Blaha modified Becke–Johnson (TB-mBJ) exchange–correlation potentials. The results demonstrate that Sr<sub>2</sub>PrRuO<sub>6</sub> is structurally stable in its ferromagnetic (FM) configuration, with a magnetic moment of 3.00 µB, while the non-magnetic (NM) phase is energetically less favorable. Structural properties calculated using GGA provided more accurate lattice parameters compared to LDA. Electronic structure analysis reveals half-metallic behavior, confirmed by the TB-mBJ potential, underscoring its suitability for spintronic applications. Optical investigations, performed with the GGA + mBJ approach, reveal a notable optical band gap and diverse responses across the infrared, visible, and ultraviolet regions, consistent with the electronic structure. Thermoelectric properties, evaluated using Boltzmann transport equations (BTE) over a temperature range of 50–1000 K, highlight promising spin-polarized transport characteristics, making Sr<sub>2</sub>PrRuO<sub>6</sub> a potential candidate for thermoelectric applications. In summary, this study highlights the unique combination of half-metallic ferromagnetism, strong optical properties, and excellent thermoelectric performance of Sr<sub>2</sub>PrRuO<sub>6</sub>, setting it apart from other double perovskites and positioning it as a promising candidate for advanced spintronic and thermoelectric applications.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"98 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143594780","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

Structural, wettability, optical, and electrical modifications by varying precursor solutions of sprayed Co3O4 thin films for solar cell applications

IF 1.6 4区物理与天体物理

The European Physical Journal B Pub Date : 2025-03-08 DOI: 10.1140/epjb/s10051-025-00889-3

Younes Nezzari, Warda Darenfad, Kamel Mirouh, Noubeil Guermat, Nadir Bouarissa

{"title":"Structural, wettability, optical, and electrical modifications by varying precursor solutions of sprayed Co3O4 thin films for solar cell applications","authors":"Younes Nezzari, Warda Darenfad, Kamel Mirouh, Noubeil Guermat, Nadir Bouarissa","doi":"10.1140/epjb/s10051-025-00889-3","DOIUrl":"10.1140/epjb/s10051-025-00889-3","url":null,"abstract":"<p>Co<sub>3</sub>O<sub>4</sub> thin films were successfully deposited by spray pyrolysis with different precursor solutions, including cobalt nitrate, cobalt acetate, and cobalt chloride. The effect of these precursor solutions on the properties of the obtained Co<sub>3</sub>O<sub>4</sub> thin films was extensively studied. XRD analysis revealed that all three films exhibited polycrystalline nature with a preferred crystal orientation along the (311) plane. The crystallite size was observed to decrease for the films prepared using three different precursors: cobalt nitrate, cobalt chloride, and cobalt acetate, respectively. Raman spectroscopy provided further confirmation of the successful formation of the Co<sub>3</sub>O<sub>4</sub> spinel structure. AFM analysis demonstrated the significant impact of the cobalt source on surface morphology. The cobalt nitrate-based film exhibited a significantly lower surface roughness value of 15.29 nm, in contrast to the films prepared from cobalt chloride and cobalt acetate, which exhibited higher roughness values of 60.30 nm and 65 nm, respectively. Contact angle analysis revealed that all the samples exhibited a hydrophobic nature. UV–visible transmission spectra revealed that the film produced using cobalt nitrate has high light absorption and a smaller optical band gap. Electrical characterization further demonstrated that the Co<sub>3</sub>O<sub>4</sub> film prepared with cobalt nitrate had the lowest electrical resistivity (<i>ρ</i> = 2.905 × 10<sup>–1</sup> Ω.cm) among the films.</p>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"98 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjb/s10051-025-00889-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143581158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Spin-dependent resonant tunneling in CdTe/Cd1−xMnxTe nanostructures: effect of polaronic mass

IF 1.6 4区物理与天体物理

The European Physical Journal B Pub Date : 2025-03-06 DOI: 10.1140/epjb/s10051-025-00888-4

L. Bruno Chandrasekar, A. Dinesh, Lalitha Gnanasekaran, Madhappan Santhamoorthy, M. Karunakaran, A. Manikandan, E. Priyadharshini, P. Shunmuga Sundaram, S. Kaleel Mohamed Ibrahim

{"title":"Spin-dependent resonant tunneling in CdTe/Cd1−xMnxTe nanostructures: effect of polaronic mass","authors":"L. Bruno Chandrasekar, A. Dinesh, Lalitha Gnanasekaran, Madhappan Santhamoorthy, M. Karunakaran, A. Manikandan, E. Priyadharshini, P. Shunmuga Sundaram, S. Kaleel Mohamed Ibrahim","doi":"10.1140/epjb/s10051-025-00888-4","DOIUrl":"10.1140/epjb/s10051-025-00888-4","url":null,"abstract":"<div><p>Effect of polaronic mass on the resonant tunneling of electrons in CdTe/Cd<sub>1−<i>x</i></sub>Mn<sub><i>x</i></sub>Te double-barrier heterostructure is investigated. The well-known transfer matrix method is employed to calculate the barrier transparency. One can obtain a high degree of spin-polarization at a high concentration of Mn in the barrier region. The barrier transparency peak becomes narrow as the concentration of Mn increases from 10 to 20%. The effect of polaronic mass shifts the transparency peak to the lower value on the energy scale. One can obtain a high degree of spin-polarization at a high concentration of Mn in the barrier region. The account of the polaronic mass shifts the resonance energy of spin-polarization to the lower value and it enhances the spin-polarization. The spin-down electrons spend more time in the heterostructure than the spin-up electrons. The dwell time changes about 1000 times as the concentration of the barrier changes.</p><h3>Graphical abstract</h3><p>Spin separation versus Mn concentration (a) without the account of polaronic mass and (b) with the account of polaronic mass</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"98 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553732","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

Density functional theory study on structural, mechanical, electronic, and phonon properties of CrAlB, MoAlB, WAlB, CrAlGa, MoAlGa, and WAlGa ternary compounds 关于 CrAlB、MoAlB、WAlB、CrAlGa、MoAlGa 和 WAlGa 三元化合物的结构、机械、电子和声子特性的密度泛函理论研究

IF 1.6 4区物理与天体物理

The European Physical Journal B Pub Date : 2025-03-06 DOI: 10.1140/epjb/s10051-025-00876-8

B. O. Mnisi

{"title":"Density functional theory study on structural, mechanical, electronic, and phonon properties of CrAlB, MoAlB, WAlB, CrAlGa, MoAlGa, and WAlGa ternary compounds","authors":"B. O. Mnisi","doi":"10.1140/epjb/s10051-025-00876-8","DOIUrl":"10.1140/epjb/s10051-025-00876-8","url":null,"abstract":"<div><p>In this study, we present the structural, mechanical, electronic, and optical properties of CrAlB, MoAlB, WAlB, CrAlGa, MoAlGa, and WAlGa compounds using first-principles density functional theory calculations. We assessed structural stability through heat of formation and found that most compounds have negative heat of formation indicating thermodynamic stability, except for MoAlGa and WAlGa. The elastic constants and moduli indicate that all CrAlB, MoAlB, WAlB, CrAlGa, MoAlGa, and WAlGa compounds are mechanically stable, exhibit elastic anisotropic behavior, relatively machinable, and mixed bonding characteristics with both ionic and covalent contributions. The MAlB (M = Cr, Mo, W) compounds display a brittle nature, whereas MAlGa exhibits ductile behavior. Analysis of Vickers hardness indicate that MAlB compounds are hard compared to MAlGa. The electronic band structures and density (DOS) of states indicate a clear metallic nature in both MAlGa and MAlB compounds. The electronic density difference plots indicate a spherical charge distribution with ionic bonding in MAlB and oblate charge distribution showing covalent bonding in MAlGa. Phonon dispersion analysis demonstrated dynamic stability in MAlB compounds, while MAlGa are dynamically unstable. We note that MAlB compounds are thermodynamically, mechanically, and dynamically stable, making them suitable for high-temperature structural applications such as aerospace and gas turbine engines.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"98 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjb/s10051-025-00876-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143564419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Magnetic impurities in an altermagnetic metal 变磁性金属中的磁性杂质

IF 1.6 4区物理与天体物理

The European Physical Journal B Pub Date : 2025-03-06 DOI: 10.1140/epjb/s10051-025-00890-w

Yu-Li Lee

{"title":"Magnetic impurities in an altermagnetic metal","authors":"Yu-Li Lee","doi":"10.1140/epjb/s10051-025-00890-w","DOIUrl":"10.1140/epjb/s10051-025-00890-w","url":null,"abstract":"<p>We study the physics of dilute magnetic impurities in a two-dimensional altermagnetic metal. For the single impurity case, although the spin degeneracy is broken in an altermagnetic metal, we show that the antiferromagnetic Kondo coupling still flows to the strong coupling regime at low energies in terms of the one-loop renormalization-group equation. Moreover, the Kondo temperature may be enhanced or reduced, depending on whether or not the Fermi level is close to the Van Hove singularity at zero altermagnetic coupling. To study the ground-state properties, we employ the variational wavefunction approach. We find that the impurity spin is completely screened at long distances, in contrast to the usual antiferromagnet. The <i>d</i>-wave nature of the spin-split Fermi surfaces in an altermagnetic metal is reflected in the correlation between the impurity and conduction electron spins, which exhibits the <span>(C_{4z})</span> symmetry of the altermagnet at long distances. The spin correlation decays as <span>(1/r^3)</span> at long distances, and its amplitude oscillates with four different periods due to the interference between the spin splitting Fermi surfaces. Moreover, the values of these periods depend on the direction of observation. Similar phenomena also occur in the RKKY interaction in an AM metal.</p><p>The Fermi surface in an altermagnetic metal is split (left). Although a magnetic impurity in an altermagnetic metal is completely screened, the spin correlation between it and the conduction electrons exhibits nontrivial angular dependence (middle) ndue to the interference between spin-split Fermi surfaces. Similar behavior is also shown in the RKKY interaction (right).</p>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"98 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143564418","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

Orientation of active particles in gradient fields

IF 1.6 4区物理与天体物理

The European Physical Journal B Pub Date : 2025-03-06 DOI: 10.1140/epjb/s10051-025-00864-y

Yuheng Zhong, Weirong Zhong

{"title":"Orientation of active particles in gradient fields","authors":"Yuheng Zhong, Weirong Zhong","doi":"10.1140/epjb/s10051-025-00864-y","DOIUrl":"10.1140/epjb/s10051-025-00864-y","url":null,"abstract":"<div><p>We used non-equilibrium molecular dynamics simulations to investigate the effects of the orientation of dumbbell-shaped active particles. Self-driven dumbbell particles are situated between two particle reservoirs connected by a channel. By setting different environmental temperatures or particle concentrations in the two reservoirs, a non-equilibrium state with a temperature or concentration gradient is induced in the channel. It is found that the magnitude of the orientation of the active particles is directly proportional to the strength of the gradient field. The direction of the orientation is in line with the temperature gradient but opposite to the concentration gradient. Moreover, the orientation of active particles is also proportional to the self-propulsion force, while Brownian particles do not exhibit any orientation. The length of the dumbbell particle also has an impact on its orientation. When the spacing is zero, resulting in circular active particles, the orientational effect disappears. Additionally, we explored the potential limitations of traditional statistical mechanics methods in self-propelled particle systems. Our research contributes to a deeper understanding of the relationship between self-propulsion forces and the orientation of active particles.</p><h3>Graphical abstract</h3><p>Using non-equilibrium molecular dynamics, we have conducted a thorough investigation into the intricate relationships governing the orientation of active particles. Notably, the orientation aligns with the temperature gradient but opposes the concentration gradient, offering a unique insight into the behavior of these particles under varying conditions. Furthermore, we observed a positive correlation between the self-propulsion force of active molecules and their orientation. This correlation underscores the significance of self-propulsion in dictating the orientational behavior of these particles, which is absent in Brownian particles.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"98 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553731","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

Probing the influence of hopping dimerization on persistent currents in cylindrical multi-channel systems

IF 1.6 4区物理与天体物理

The European Physical Journal B Pub Date : 2025-03-05 DOI: 10.1140/epjb/s10051-025-00892-8

Ipshita Baruah, Anushka Patowary, Sudin Ganguly

引用次数: 0