Chinese Journal of Physics最新文献

Thermal radiation and salt finger-induced chaotic double-diffusive convection with concentration modulation along an inclined plane 热辐射与盐指沿斜面浓度调制的混沌双扩散对流

IF 4.6 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Chinese Journal of Physics

Pub Date : 2026-01-31 DOI: 10.1016/j.cjph.2026.01.026

Rohit Kannaujiya , B.S. Bhadauria

The study examines the impact of time-dependent solute on an inclined plane under thermal radiation using an analytical approach. The ordinary differential equation, which is time dependent and non-autonomous, is used to frame the problem. The nonlinear theory and solvability condition are used to create the Ginzburg Landau equation. A nonlinear stability analysis of the stationary mode convection has been carried out and heat and mass transfer in terms of Sherwood number (Sh) and Nusselt number (Nu) are obtained. The Sherwood number (Sh) and Nusselt number (Nu) are found in terms of Rayleigh number, Lewis number, amplitude of convection, and analyzed graphically for various parameters of the system. The Lorenz model is employed to analyze chaotic convection near onset, showing transitions from steady to chaotic states. Flow patterns are visualized using streamlines, isotherms, and isohalines. In case of In-Phase Modulation, ω & δ have negligible effects while heat and mass transport increased in Out-phase and Upper Boundary Phase Modulation. Lewis number (Le) decreases the heat transfer while increasing the mass transfer due to the time-dependent concentration and surfaces concentrated from the above i.e. finger salt process. It is concluded that convection is less pronounced on the inclined surface compared to horizontal surface, which shows that Nu increases more quickly for horizontal fluid layer that it does for inclined fluid layer.

该研究考察了时间依赖的溶质对斜面的影响，在热辐射下使用分析方法。用非自治的常微分方程来描述问题。利用非线性理论和可解性条件建立了金兹堡-朗道方程。对定模对流进行了非线性稳定性分析，得到了用Sherwood数（Sh）和Nusselt数（Nu）表示的传热传质。通过Rayleigh数、Lewis数、对流振幅，求出了Sherwood数（Sh）和Nusselt数（Nu），并对系统各参数进行了图形化分析。采用Lorenz模型分析混沌对流的近起始状态，显示了从稳态到混沌状态的转变。流动模式使用流线、等温线和等盐线可视化。在同相调制情况下，ω &； δ的影响可以忽略不计，而在同相调制和上边界调制情况下，热量和质量输运增加。刘易斯数（Le）减少了传热，同时增加了传质，这是由于时间依赖的浓度和从上述过程中浓缩的表面，即手指盐过程。结果表明，相对于水平流体层，倾斜流体层对流较弱，表明水平流体层Nu的增大速度要快于倾斜流体层。

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引用次数: 0

A New Reduction Method to Find Rogue Waves of the Nonlinear Schro....dinger Equation 一种寻找非线性Schro异常波的新约简方法....谔方程

IF 4.6 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Chinese Journal of Physics

Pub Date : 2026-01-30 DOI: 10.1016/j.cjph.2026.01.022

Dazhao Lü , Yanying Cui , Xiufang Wang

Rogue waves of the focusing nonlinear Schrödinger equation are obtained by a novel and highly efficient composite function reduction method. Compared to existing literatures, instead of the nonlinear differential operators

{[f (p_{i}) \partial_{p_{i}}]}^{k}

and

{[f (q_{j}) \partial_{q_{j}}]}^{l}

, the only linear differential operators

\partial_{λ}^{k}

and

\partial_{μ}^{l}

are used in this paper, which significantly simplify the computational process for deriving rogue waves and the analytical expressions of rogue waves. On the technical aspect, this research makes two key contributions to soliton theory. First, it broadens the applicability of the Grammian technique to a wider range by generalizing the constants p_i and q_j in the nonlinear dispersion relation to the functions

p_{i} = h (λ), q_{j} = h (μ)

. Second, it adds diversity to the available reduction techniques in soliton theory by introducing the composite function reduction method.

采用一种新颖高效的复合函数约简方法得到了聚焦非线性Schrödinger方程的异常波。与已有的文献相比，本文使用的是线性微分算子∂λk和∂μl，而不是非线性微分算子[f(pi)∂pi]k和[f(qj)∂qj]l，极大地简化了异常波推导和异常波解析表达式的计算过程。在技术方面，本研究对孤子理论做出了两个关键贡献。首先，通过将非线性色散关系中的常数pi和qj推广到函数pi=h(λ),qj=h(μ)，拓宽了Grammian技术的适用范围。其次，引入复合函数约简方法，增加了孤子理论中现有约简方法的多样性。

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引用次数: 0

Unveiling the impact of bonding asymmetry on the lattice thermal conductivity of MnXS2Cl (X=Sb, Bi) for promising thermoelectric applications 揭示了键合不对称对MnXS2Cl （X=Sb, Bi）晶格热导率的影响

IF 4.6 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Chinese Journal of Physics

Pub Date : 2026-01-24 DOI: 10.1016/j.cjph.2026.01.018

Suiting Ning , Ziye Zhang , Xiaochen Liu , Zhiquan Chen

Both anharmonicity and phonon scattering have significant effects on the lattice thermal conductivity of materials. Through the calculation on the double-anion chalcohalides MnXS₂Cl (X=Sb,Bi), it is found that both MnSbS₂Cl and MnBiS₂Cl exhibit low intrinsic lattice thermal conductivity, which are only 0.40 and 0.46 W m

^{- 1}

K

^{- 1}

at 300 K, respectively. In order to clarify the origin of the low lattice thermal conductivity in this kind of material, the phonon correlation quantities are analyzed in detail by the phonon Boltzmann transport theory. It is discovered that the presence of double-anion causes distortion in the crystal structure and the asymmetry in chemical bonding. The bonding asymmetry leads to strong coupling between acoustic-optical branches and therefore more phonon scattering processes, decreasing the phonon relaxation time. The weak X-Cl bonding also leads to low phonon group velocity. These two factors greatly reduce the lattice thermal conductivity of the MnXS₂Cl compounds. In addition, due to the more suitable carrier effective mass and the achievement of band convergence in the conduction band, MnXS₂Cl exhibits superior electronic transport properties for n-type materials. Combined with the low intrinsic lattice thermal conductivity, the optimal ZT value of MnSbS₂Cl can reach 2.7 at 800 K, indicating that it has excellent thermoelectric performance. This study provides a theoretical basis for elucidating the thermal conductivity characteristics of mixed-anion chalcohalides, and demonstrates the potential applications of such materials in the thermoelectric field.

非调和性和声子散射对材料的晶格热导率都有显著影响。通过对双阴离子乙醇化物MnXS2Cl （X=Sb,Bi）的计算，发现MnSbS2Cl和MnBiS2Cl均表现出较低的本征晶格热导率，在300 K时分别为0.40和0.46 W m−1 K−1。为了阐明这类材料晶格热导率低的原因，利用声子玻尔兹曼输运理论对声子相关量进行了详细分析。发现双阴离子的存在引起晶体结构的畸变和化学键的不对称。键的不对称导致声光分支之间的强耦合，从而导致更多的声子散射过程，减少声子弛豫时间。弱的X-Cl键也导致了低声子群速度。这两个因素大大降低了MnXS2Cl化合物的晶格热导率。此外，由于MnXS2Cl具有更合适的载流子有效质量，并且在导带中实现了能带收敛，MnXS2Cl在n型材料中表现出优越的电子输运性能。结合MnSbS2Cl较低的本禀晶格导热系数，在800 K时ZT最优值可达2.7，表明其具有优异的热电性能。本研究为阐明混合阴离子乙醇化物的导热特性提供了理论基础，并展示了该材料在热电领域的潜在应用前景。

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引用次数: 0

Kármán vortex street in a discrete quasi-2D Bose-Einstein condensate Kármán离散准二维玻色-爱因斯坦凝聚中的涡旋街

IF 4.6 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Chinese Journal of Physics

Pub Date : 2026-01-23 DOI: 10.1016/j.cjph.2026.01.017

Bao-Long Xi , Xiao-Bei Fan , Kai-Hua Shao , Pu Tu , Xi Zhao , Zhong-Hong Xi , Rui-Ming Su , Jin-Ping Ma , Yu-Ren Shi

The dynamical behaviors of a discrete quasi-2D Bose-Einstein condensate (BEC) through a moving obstacle potential are investigated numerically. Under various discrete strengths, four special vortex arrangement patterns are discovered, namely symmetrical double-row wake, oblique drift wake, V-shaped wake and Kármán vortex street. The Kármán vortex street, which consists of periodic antisymmetric double row vortex pairs, occurs in discrete BEC when the width and velocity of the obstacle potential reach an appropriate value. It can be noted that the stability condition for vortex streets in discrete BEC is smaller than that (0.28) for vortex streets in classical fluids, and it approaches 0.28 as the discrete intensity increases. The results show that the velocity of the obstacle potential required to form the Kármán vortex street increases with the increase of discrete intensity. As the discrete strength increases from 4 to 8, the parameter region where the vortex street appears in the

d - v

phase diagram manifests as several discrete and independent domains. The intrinsic mechanism related to the formation of wake flow was analyzed in detail by calculating the drag force on the obstacle potential. Notably, the vertical component of the drag force exhibits sinusoidal oscillations when the wake is a Kármán vortex street, which can be used to calculate the shedding frequency of vortex pairs in the vortex street.

用数值方法研究了离散准二维玻色-爱因斯坦凝聚体（BEC）在移动障碍势中的动力学行为。在不同离散强度下，发现了对称双排尾迹、斜漂尾迹、v形尾迹和Kármán涡街四种特殊的涡排模式。当障碍势的宽度和速度达到一定值时，离散BEC中出现由周期性反对称双排涡对组成的Kármán涡街。可以看出，离散BEC中涡街的稳定条件小于经典流体中涡街的稳定条件（0.28），随着离散强度的增大，其稳定条件趋于0.28。结果表明：形成Kármán涡街所需的障碍势速度随离散强度的增大而增大；当离散强度从4增加到8时，d - v相图中出现涡街的参数区域表现为多个离散且独立的域。通过对障碍势阻力的计算，详细分析了尾流形成的内在机理。值得注意的是，当尾迹为Kármán涡街时，阻力垂直分量呈现正弦振荡，可用于计算涡街中涡对的脱落频率。

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引用次数: 0

Quantum key-recovery attacks on beyond-birthday-bound MACs 对超过生日限制的mac进行量子密钥恢复攻击

IF 4.6 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Chinese Journal of Physics

Pub Date : 2026-01-22 DOI: 10.1016/j.cjph.2026.01.016

Hong-Wei Sun , Rong-Xue Xu , Bao-Min Zhou , Dan-Dan Li , Ke-Jia Zhang

Beyond-Birthday-Bound (BBB) MACs are crucial cryptographic schemes that typically offer 2/3-bit security. In this paper, we study the security of BBB MACs in a quantum setting, where attackers can make quantum superposition queries and perform offline quantum computations. We first present quantum key-recovery attacks on several parallelizable BBB MACs, taking quantum time

\tilde{O} (2^{n / 2})

, with O(n) quantum online queries and O(n²) qubits. Next, we extend our attack to certain serial BBB constructions in quantum time

\tilde{O} (2^{n})

, with O(n) quantum online queries and O(n²) qubits. Specifically, by constructing new hidden periodic functions corresponding to several BBB MACs, these attacks can recover secret keys using the offline Simon algorithm, leading to forgery attacks. Our attacks improve certain superposition attacks by reducing their data complexity from exponential to polynomial while maintaining the same time complexity. This implies that while BBB MACs achieve beyond-birthday-bound security classically, they cannot maintain the same level of security in quantum settings.

超越生日界限（BBB） mac是关键的加密方案，通常提供2/3位安全性。在本文中，我们研究了量子环境下BBB mac的安全性，攻击者可以进行量子叠加查询和离线量子计算。我们首先在几个可并行的BBB mac上提出量子密钥恢复攻击，量子时间为O ~ (2n/2)，具有O(n)个量子在线查询和O（n2）个量子比特。接下来，我们将攻击扩展到量子时间O ~ （2n）的某些串行BBB结构，具有O(n)个量子在线查询和O（n2）个量子比特。具体来说，这些攻击通过构造与多个BBB mac对应的新的隐藏周期函数，利用离线Simon算法恢复密钥，从而实现伪造攻击。我们的攻击通过在保持相同时间复杂度的情况下将某些叠加攻击的数据复杂度从指数级降低到多项式级，从而改进了某些叠加攻击。这意味着，虽然BBB mac在传统上实现了超越生日限制的安全性，但它们无法在量子设置中保持相同的安全级别。

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引用次数: 0

Role of asymmetry and deformation parameters in the population of high spin states associated with incomplete fusion 不对称和变形参数在与不完全融合相关的高自旋态居群中的作用

IF 4.6 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Chinese Journal of Physics

Pub Date : 2026-01-20 DOI: 10.1016/j.cjph.2026.01.011

Amritraj Mahato , Dharmendra Singh , Pankaj K. Giri , Nitin Sharma , Harish Kumar , Rahbar Ali , R. Tripathi , S.S. Ghugre , M. Afzal Ansari , R. Kumar , S. Muralithar , R.P. Singh

The spin distributions of different evaporation residues produced in the system ¹⁹F + ¹⁵⁴Sm have been measured at an energy of  ≈ 6 MeV/nucleon. The measured spin distributions and feeding intensity patterns of complete and incomplete fusion channels are found to be entirely different, indicating their population through different reaction routes. The results obtained from the measured data suggest the incomplete fusion observed in the interaction of ¹⁹F projectile with ¹⁵⁴Sm target has a peripheral nature. The measured spin distributions of α emitting channels in the forward angular zone provide an experimental signature of the breakup of ¹⁹F projectile. The influence of the mass and charge asymmetries of the entrance channel as well as the deformations of the projectile and target, on the average angular momentum ( < ℓ > ) values imparted in the system has also been investigated. The ( < ℓ > ) values associated with complete and incomplete fusion channels were found to be significantly influenced by the asymmetry parameters and the deformations of the projectile and target. These results include the identification of certain degrees of freedom, like the asymmetry and deformation of the entrance channel in the population of high-spin states. The present systematic study provides experimental evidence for the localization of CF and successive ICF channels in successive angular momentum windows as proposed in the Sumrule model for a wide range of systems and variable projectile and target deformations.

在能量为 ≈ 6 MeV/核子的条件下，测量了19F + 154Sm体系中不同蒸发残留物的自旋分布。发现完全和不完全融合通道的自旋分布和进料强度模式完全不同，表明它们通过不同的反应途径填充。实测数据表明，19F弹与154Sm靶相互作用过程中观察到的不完全融合具有外围性。在前角区α发射通道的自旋分布提供了19F弹丸破碎的实验特征。研究了入口通道的质量和电荷不对称以及弹体和靶体的变形对系统平均角动量（ <； r >； ）的影响。发现完全和不完全融合通道的（ <；  & >； ）值受不对称参数和弹靶变形的显著影响。这些结果包括对某些自由度的识别，如高自旋态居群中入口通道的不对称性和变形。本系统的研究为连续角动量窗口中CF和连续ICF通道的定位提供了实验证据，该定位是在Sumrule模型中提出的，适用于广泛的系统和可变的弹丸和目标变形。

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引用次数: 0

Shock wave dynamics in a non-ideal dusty rotating gas influenced by magnetic field and radiation heat flux 非理想含尘旋转气体中受磁场和辐射热流影响的激波动力学

IF 4.6 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Chinese Journal of Physics

Pub Date : 2026-01-17 DOI: 10.1016/j.cjph.2026.01.012

Deepika Singh, Anshul Phogat

In this paper, the authors investigate the propagation of cylindrical shock wave in a rotational axisymmetric non-ideal dusty gas under the effect of magnetic field and radiation heat flux. The method of Lie group of transformations is used to determine the whole range of similarity solutions for the considered problem in the medium of constant density. Different possible cases of potential solutions with power-law and exponential-law shock paths have been determined considering different cases for the arbitrary constants appearing in the expressions of generators of the Lie group of transformations. The numerical solutions obtained in the case of a power-law shock path have been discussed in detail. The shock strength and flow variables behind the shock front are analyzed with respect to the variation in physical parameters like the non-ideal parameter, adiabatic exponent, mass fraction of the solid particles, the ratio of the density of solid particles to the initial density of the gas and Alfvén-Mach number. It is found that the shock strength reduces as the non-ideal parameter, the Alfvén-Mach number, and the adiabatic exponent increase. In contrast, it increases as the mass fraction of the solid particles and the ratio of the density of solid particles to the initial density of the gas increase.

本文研究了旋转轴对称非理想含尘气体中圆柱激波在磁场和辐射热流的作用下的传播。利用李群变换的方法确定了所考虑问题在等密度介质中的全范围相似解。考虑变换李群发生器表达式中出现任意常数的不同情况，确定了幂律激波路径和指数律激波路径势解的不同可能情况。详细讨论了幂律激波路径下的数值解。从非理想参数、绝热指数、固体颗粒质量分数、固体颗粒密度与气体初始密度之比、alfv -马赫数等物理参数的变化，分析了激波强度和激波前缘后的流动变量。研究发现，激波强度随非理想参数的增大而减小，随着阿尔夫曼-马赫数的增大而减小，随着绝热指数的增大而减小。相反，它随着固体颗粒的质量分数和固体颗粒密度与气体初始密度之比的增加而增加。

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引用次数: 0

An estimation magnetic field influence on hemoglobin and oxygen concertation-dependent diffusion in red blood cells: A theoretical and numerical study 估计磁场对红细胞中血红蛋白和氧浓度依赖扩散的影响：理论和数值研究

IF 4.6 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Chinese Journal of Physics

Pub Date : 2026-01-16 DOI: 10.1016/j.cjph.2026.01.014

Relja Dragnić , Ivona Kovačević , Milan S. Kovačević , Vladimir M. Marković

The transport of oxygen within red blood cells (RBCs) is governed by the interplay between molecular diffusion, membrane permeability, and reversible binding to hemoglobin. In this work, authors develop a theoretical framework for modeling oxygen diffusion and hemoglobin reactions, progressively incorporating three cases of increasing complexity: (i) diffusion with constant coefficients, (ii) diffusion with concentration-dependent coefficients, and (iii) diffusion under the influence of static magnetic fields. In the first case, oxygen transport is described by Fickian diffusion coupled with the reversible binding and unbinding of oxygen to hemoglobin, assuming a constant diffusion coefficient. In the second case, experimentally validated concentration-dependent diffusion coefficients are introduced, capturing the effects of macromolecular crowding within the RBC interior. In the third case, the potential influence of static magnetic fields is considered via an effective diffusion coefficient,

D_{eff} (B)

, distinguishing between diamagnetic oxyhemoglobin and paramagnetic deoxyhemoglobin; however, under fields below ∼10 T, these effects are negligible. The resulting system of coupled partial differential equations is solved using finite-difference discretization schemes, allowing numerical analysis of concentration fields in space and time. Initial and boundary conditions reflect physiological venous to artery transitions and realistic membrane permeabilities. Results highlight the predominant role of concentration-dependent diffusion in modulating oxygen and hemoglobin distributions, while magnetic contributions are only under ultra-high fields. This framework establishes a generalizable basis for further quantitative studies on hemoglobin-mediated oxygen transport and may serve as a foundation for integrating more complex biophysical interactions relevant to red cell physiology.

氧在红细胞内的运输是由分子扩散、膜通透性和与血红蛋白的可逆结合之间的相互作用控制的。在这项工作中，作者开发了一个氧气扩散和血红蛋白反应建模的理论框架，逐步纳入三种日益复杂的情况：(i)常系数扩散，（ii）浓度相关系数扩散，（iii）静态磁场影响下的扩散。在第一种情况下，氧的运输被描述为菲克氏扩散，加上氧与血红蛋白的可逆结合和解结合，假设扩散系数恒定。在第二种情况下，引入了实验验证的浓度相关扩散系数，捕获了红细胞内部大分子拥挤的影响。在第三种情况下，通过有效扩散系数Deff(B)来考虑静磁场的潜在影响，区分抗磁性脱氧血红蛋白和顺磁性脱氧血红蛋白；然而，在低于~ 10 T的电场下，这些影响可以忽略不计。所得到的耦合偏微分方程组采用有限差分离散格式进行求解，从而可以对空间和时间上的浓度场进行数值分析。初始和边界条件反映了生理的静脉到动脉的过渡和现实的膜透性。结果强调了浓度依赖的扩散在调节氧和血红蛋白分布中的主导作用，而磁场仅在超高场下起作用。该框架为进一步定量研究血红蛋白介导的氧运输奠定了可推广的基础，并可作为整合与红细胞生理学相关的更复杂的生物物理相互作用的基础。

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引用次数: 0

The role of dust concentrations and kaniadakis entropy in the dynamics of dust-ion-acoustic waves in magnetized dusty plasmas 尘埃浓度和卡尼达基斯熵在磁化尘埃等离子体中尘埃离子声波动力学中的作用

IF 4.6 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Chinese Journal of Physics

Pub Date : 2026-01-09 DOI: 10.1016/j.cjph.2025.12.036

A. Atteya , M. Abd-Elzaher , Reem Altuijri , Kottakkaran Sooppy Nisar , Abdel-Haleem Abdel-Aty , P.K. Karmakar , Eman Mohammed El-Bayoumi

This study provides a thorough analysis of Dust-Ion-Acoustic Waves (DIAWs) in a four-component, magnetized collisionless dusty plasma system. By deriving the modified Zakharov-Kuznetsov (mZK) equation through the reductive perturbation method, we examined solitary wave characteristics. We identified the significant effects of dust grain densities and the Kaniadakis parameter on phase velocity, nonlinear and dispersive terms, and overall wave stability. This research highlights the critical role of dust concentrations and the Kaniadakis parameter in wave dynamics, contributing to our understanding of phenomena such as cometary tails and planetary rings. The integration of Kaniadakis entropy enhances our comprehension of non-Maxwellian distributions, paving the way for future studies on plasma dynamics and their implications in cosmic phenomena.

本研究对四组分磁化无碰撞尘埃等离子体系统中的尘埃离子声波（DIAWs）进行了深入分析。利用约化微扰法推导了修正的Zakharov-Kuznetsov （mZK）方程，研究了孤立波的特性。结果表明，尘粒密度和Kaniadakis参数对相速度、非线性和色散项以及总体波动稳定性有显著影响。这项研究强调了尘埃浓度和Kaniadakis参数在波动动力学中的关键作用，有助于我们理解彗星尾巴和行星环等现象。卡尼达基斯熵的整合增强了我们对非麦克斯韦分布的理解，为未来等离子体动力学及其在宇宙现象中的意义的研究铺平了道路。

引用次数: 0

Ferromagnetic quantum spin hall effect in 2D rare-earth nitride van der Waals heterostructures 二维稀土氮化物范德华异质结构中的铁磁量子自旋霍尔效应

IF 4.6 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Chinese Journal of Physics

Pub Date : 2026-01-09 DOI: 10.1016/j.cjph.2026.01.010

Zijian Wang , Yanqing Shen , Weijing Yan , Xin Yang , Qing Ai , Yong Shuai , Zhongxiang Zhou

The manipulation of topological electronic states is a key scientific challenge in the development of next-generation quantum devices. In this work, we propose a universal topological engineering strategy based on magnetic symmetry control, realized via van der Waals heterostructures of rare-earth nitrides and an inert GaS spacer, denoted as XN₂/GaS/XN₂ (X = Gd, Tb, Dy, Ho, Tm, Er). This platform enables programmable topological phase transitions between ferromagnetic quantum spin Hall insulators (QSHIs) and antiferromagnetic quantum anomalous Hall insulators (QAHIs). By continuously tuning the in-plane magnetization direction, the Berry curvature distribution is effectively modulated, inducing periodic transitions between topologically trivial and nontrivial states. Taking ErN₂/GaS/ErN₂ as a representative system, we track the evolution of the Chern number and ℤ₂ invariant with magnetization orientation, demonstrating a reversible switching between QSHI and QAHI phases. The same mechanism is found to operate across the full series of XN₂/GaS/XN₂ heterostructures, establishing its generality. These results offer both a robust theoretical framework and a practical material platform for the magnetization-controlled realization of quantum spin and anomalous Hall phases in two-dimensional magnetic van der Waals systems, paving the way for reconfigurable topological devices.

拓扑电子态的操纵是下一代量子器件发展的关键科学挑战。在这项工作中，我们提出了一种基于磁对称控制的通用拓扑工程策略，该策略通过稀土氮化物的范德华异质结构和惰性气体间隔剂XN2/GaS/XN2 （X = Gd, Tb, Dy, Ho, Tm, Er）来实现。该平台实现了铁磁量子自旋霍尔绝缘体（QSHIs）和反铁磁量子反常霍尔绝缘体（QAHIs）之间的可编程拓扑相变。通过不断调整平面内磁化方向，可以有效地调制Berry曲率分布，诱导拓扑平凡和非平凡状态之间的周期性转换。以ErN2/GaS/ErN2为代表系统，我们跟踪了陈氏数和2不变量随磁化方向的演化，证明了QSHI和QAHI相之间的可逆切换。在XN2/GaS/XN2异质结构的整个系列中发现了相同的机制，建立了其普遍性。这些结果为二维磁性范德华体系中量子自旋和反常霍尔相的磁化控制实现提供了一个强大的理论框架和实用的材料平台，为可重构拓扑器件铺平了道路。

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引用次数: 0