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Tunable wavelength-decoding switch for Pancharatnam-Berry phase transition base on vanadium dioxide
IF 2.3 3区 物理与天体物理
Physics Letters A Pub Date : 2025-01-31 DOI: 10.1016/j.physleta.2025.130316
Huaiyuan Yin
{"title":"Tunable wavelength-decoding switch for Pancharatnam-Berry phase transition base on vanadium dioxide","authors":"Huaiyuan Yin","doi":"10.1016/j.physleta.2025.130316","DOIUrl":"10.1016/j.physleta.2025.130316","url":null,"abstract":"<div><div>Leveraging the phase transition of vanadium dioxide (VO<sub>2</sub>), this work explores wavefront manipulation and temperature-induced polarization conversion. Building on previous research, we further investigate the potential of phase transition materials in controlling the Pancharatnam-Berry (PB) phase of circularly polarized light, achieving dual selectivity in terms of wavelength and temperature. Through the same structure, different effects are realized at different frequencies: a working band at 420 THz for phase encoding as a temperature-controlled switch, and a key band at 520 THz for phase decoding. The polarization control within its working band is verified through simulations of three functional devices, demonstrating potential applications in the fields of integrated optics and communications.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"537 ","pages":"Article 130316"},"PeriodicalIF":2.3,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143208427","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
Topological Anderson insulator phases in one dimensional quasi-periodic mechanical SSH chains
IF 2.3 3区 物理与天体物理
Physics Letters A Pub Date : 2025-01-31 DOI: 10.1016/j.physleta.2025.130314
Sayan Sircar
{"title":"Topological Anderson insulator phases in one dimensional quasi-periodic mechanical SSH chains","authors":"Sayan Sircar","doi":"10.1016/j.physleta.2025.130314","DOIUrl":"10.1016/j.physleta.2025.130314","url":null,"abstract":"<div><div>In this paper, we explore the transition between different topological phases, in a Su-Schrieffer-Heeger (SSH) model composed of springs and masses in which the intracellular Aubry-André disorder modulates the spring constants. We analytically compute the eigenvectors and eigenvalues of the dynamical matrix for both periodic and fixed boundary conditions, and compare them with the dispersion spectrum of the original tight-binding SSH model. We observe the presence of a topological Anderson insulating (TAI) phase within a specific range of quasi-periodic modulation strength and calculate the phase transition boundary analytically. We analyze the localization properties of normal modes by examining the inverse participation ratio (IPR) of eigenstates, of the dynamical matrix, and the corresponding fractal dimension associated with quasiperiodic modulation. We also examine the stability of the TAI phase across a range of modulation strengths and comments on the presence of mobility edge that separate localized modes from non-localized ones. We expand our analysis of analytically calculating the expression for the anomalous mobility edge in the context of Aubry-André modulation of intra-cellular spring stiffness. This involves computing the Lyapunov exponent of all the eigenmodes related to intra-cellular dynamics. We demonstrate that specific analytical techniques are required to obtain an exact expression for the mobility edges when considering Aubry-André modulation in intra-cellular spring stiffness.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"537 ","pages":"Article 130314"},"PeriodicalIF":2.3,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136339","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
Floquet engineering of quantum thermal machines: A gradient-based spectral method to optimize their performance
IF 2.3 3区 物理与天体物理
Physics Letters A Pub Date : 2025-01-31 DOI: 10.1016/j.physleta.2025.130309
Alberto Castro
{"title":"Floquet engineering of quantum thermal machines: A gradient-based spectral method to optimize their performance","authors":"Alberto Castro","doi":"10.1016/j.physleta.2025.130309","DOIUrl":"10.1016/j.physleta.2025.130309","url":null,"abstract":"<div><div>A procedure to find optimal regimes for quantum thermal engines (QTMs) is described and demonstrated. The QTMs are modelled as the periodically-driven non-equilibrium steady states of open quantum systems, whose dynamics is approximated in this work with Markovian master equations. The action of the external agent and the couplings to the heat reservoirs can be modulated with control functions, and it is the time-dependent shape of these control functions the object of optimisation. Those functions can be freely parameterised, which permits to constrain the solutions according to experimental or physical requirements.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"536 ","pages":"Article 130309"},"PeriodicalIF":2.3,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143147073","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
Investigating photocurrent enhancement of monolayer MoSe2/MoS2 heterojunction integrated with Ag nanowire
IF 2.3 3区 物理与天体物理
Physics Letters A Pub Date : 2025-01-30 DOI: 10.1016/j.physleta.2025.130315
Qingsong Liang , Cunwei Kong , Jiangkai Yuan , Quan Wang
{"title":"Investigating photocurrent enhancement of monolayer MoSe2/MoS2 heterojunction integrated with Ag nanowire","authors":"Qingsong Liang ,&nbsp;Cunwei Kong ,&nbsp;Jiangkai Yuan ,&nbsp;Quan Wang","doi":"10.1016/j.physleta.2025.130315","DOIUrl":"10.1016/j.physleta.2025.130315","url":null,"abstract":"<div><div>The heterojunction composed of monolayer two-dimensional transition metal chalcogenides has excellent physicochemical properties. However, atomical thickness and low absorption limited its wide application. Surface plasmons (SPs) of metal nanostructures can realize the localization of light and the enhancement of electromagnetic field, which is an effective way to improve the light absorption for the heterojunction film. Herein, the SPs of single silver nanowire (Ag NW) under 405 nm excitation light were used to enhance the photocurrent of monolayer (1L) MoSe<sub>2</sub>/MoS<sub>2</sub> heterojunction by 10-fold. The light response speed of the heterojunction phototransistor based on Ag NW was improved by 1000-fold. In addition, theoretical simulation shows that the 'hot spot' phenomenon occurred at the interface between Ag NW and 1 L MoSe<sub>2</sub>/MoS<sub>2</sub> heterojunction, which increased the maximum electric field strength by 58.8 %. This research provides a reference for the application of metal-heterojunction hybrid structures in photodetection.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"537 ","pages":"Article 130315"},"PeriodicalIF":2.3,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136332","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
Spontaneous symmetry breaking induced by nonlinear interaction in a coupler supported by fractional diffraction
IF 2.3 3区 物理与天体物理
Physics Letters A Pub Date : 2025-01-30 DOI: 10.1016/j.physleta.2025.130311
Mateus C.P. dos Santos , Wesley B. Cardoso
{"title":"Spontaneous symmetry breaking induced by nonlinear interaction in a coupler supported by fractional diffraction","authors":"Mateus C.P. dos Santos ,&nbsp;Wesley B. Cardoso","doi":"10.1016/j.physleta.2025.130311","DOIUrl":"10.1016/j.physleta.2025.130311","url":null,"abstract":"<div><div>In this paper we introduce a one-dimensional model of coupled fractional nonlinear Schrödinger equations with a double-well potential applied to one component. This study examines ground state (GS) solitons, observing spontaneous symmetry breaking (SSB) in both the actuated field and the partner component due to nonlinear coupling. Numerical simulations reveal symmetric and asymmetric profiles arising from a slightly asymmetric initial condition. Asymmetry is influenced by nonlinearities, potential depth, and coupling strength, with self-focusing systems favoring greater asymmetry. Fractional diffraction affects the amplitude and localization of symmetric profiles and the stability of asymmetric ones. We identify critical Lévy index values for generating coupled GS solitons. Stability analysis of unstable, centrally asymmetric GS solitons demonstrates oscillatory dynamics, providing new insights into SSB in fractional systems and half-trapped solitons.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"537 ","pages":"Article 130311"},"PeriodicalIF":2.3,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136336","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
Rotation of kinetic orbital angular momentum of a charged particle due to effects of global geometric phase
IF 2.3 3区 物理与天体物理
Physics Letters A Pub Date : 2025-01-30 DOI: 10.1016/j.physleta.2025.130310
Pei-Song He
{"title":"Rotation of kinetic orbital angular momentum of a charged particle due to effects of global geometric phase","authors":"Pei-Song He","doi":"10.1016/j.physleta.2025.130310","DOIUrl":"10.1016/j.physleta.2025.130310","url":null,"abstract":"<div><div>We study the time evolution of the kinetic orbital angular momentum of a charged particle outside an infinitely-long solenoid. We find that quantum mechanically, in contrast to a classical analog, a pure magnetic vector potential with zero magnetic field strength can rotate the kinetic orbital angular momentum of the particle. Furthermore, diamagnetism-like behaviors appear, which are different from that can be predicted naively from the quantum Hamiltonian.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"536 ","pages":"Article 130310"},"PeriodicalIF":2.3,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143147154","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
Controlling nonlocality of bipartite qubit states via quantum channels
IF 2.3 3区 物理与天体物理
Physics Letters A Pub Date : 2025-01-30 DOI: 10.1016/j.physleta.2025.130313
Adam Rutkowski , Katarzyna Siudzińska
{"title":"Controlling nonlocality of bipartite qubit states via quantum channels","authors":"Adam Rutkowski ,&nbsp;Katarzyna Siudzińska","doi":"10.1016/j.physleta.2025.130313","DOIUrl":"10.1016/j.physleta.2025.130313","url":null,"abstract":"<div><div>In this paper, we analyze quantum channels derived from a class of two-qubit states known as the X states. In particular, we consider X states that break the Bell's CHSH condition and then characterize the associated inverse Choi-Jamiołkowski maps, which we call nonlocality generating. Interestingly, the region corresponding to nonlocality generating channels shrinks as their stationary state departs from the maximally mixed state. Finally, we demonstrate special cases, where nonlocality can be fully characterized via as little as a single parameter. This approach significantly simplifies the analysis of nonlocality for the X states.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"536 ","pages":"Article 130313"},"PeriodicalIF":2.3,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143147072","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
Approximate solutions for electronic states with non-standard Landau levels in graphene under uniaxial strain modulation
IF 2.3 3区 物理与天体物理
Physics Letters A Pub Date : 2025-01-29 DOI: 10.1016/j.physleta.2025.130305
Juan D. García-Muñoz , J.C. Pérez-Pedraza , A. Raya
{"title":"Approximate solutions for electronic states with non-standard Landau levels in graphene under uniaxial strain modulation","authors":"Juan D. García-Muñoz ,&nbsp;J.C. Pérez-Pedraza ,&nbsp;A. Raya","doi":"10.1016/j.physleta.2025.130305","DOIUrl":"10.1016/j.physleta.2025.130305","url":null,"abstract":"<div><div>Approximate solutions for the quantum bound states of an electron in graphene under a uniaxial strain modulation have been obtained. A first-order Taylor expansion for the Fermi velocity and the pseudo-vector potential in the effective Hamiltonian describing graphene under a uniaxial strain allows us to solve the corresponding differential equation of the eigenvalue problem. A finite number of bound states have been found and its spectrum is composed by non-standard Landau levels, that in contrast to the standard Landau levels, have a dependency on the square root of a second-order polynomial of the principal quantum number. A special case of interest is the periodic strain, where the zeroth-order approximation, that generates standard Landau levels, was derived. It turns out that the first-order approximation generates less energy levels than the zeroth-order approximation.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"536 ","pages":"Article 130305"},"PeriodicalIF":2.3,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146573","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
Giant piezoelectricity due to critical phenomena associated with restabilized rhombohedral phase in Pb(Mg1/3Nb2/3)O3–0.3PbTiO3
IF 2.3 3区 物理与天体物理
Physics Letters A Pub Date : 2025-01-28 DOI: 10.1016/j.physleta.2024.130165
Jianxun Xie, Wenhui Ma
{"title":"Giant piezoelectricity due to critical phenomena associated with restabilized rhombohedral phase in Pb(Mg1/3Nb2/3)O3–0.3PbTiO3","authors":"Jianxun Xie,&nbsp;Wenhui Ma","doi":"10.1016/j.physleta.2024.130165","DOIUrl":"10.1016/j.physleta.2024.130165","url":null,"abstract":"<div><div>Following our previous phenomenological modeling of pressure driven Curie transition and rhombohedral-tetragonal phase boundary in Pb(Mg<sub>1/3</sub>Nb<sub>2/3</sub>)O<sub>3</sub>–0.3PbTiO<sub>3</sub>, in this work we focus on combined effects of moderate pressure and [111]-oriented <em>E</em>-field and report huge broad peaks of piezoelectric <em>d</em><sub>33</sub> in restabilized rhombohedral phase region stretching from around near-tricritical triple point (TP) to the regime of critical end point (CEP). TP and CEP exhibit distinctive features in the free energy landscape and pressure dependence of piezoelectric constants. We also find gigantic piezoelectricity in metastable monoclinic state coexisting with the restabilized rhombohedral state over the field level for the TP. Tricriticality occurred in a single ferroelectric composition on a phase plane of pressure vs. <em>E</em>-field is comparable to that observed in solid solutions on a phase plane of temperature vs. composition.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"531 ","pages":"Article 130165"},"PeriodicalIF":2.3,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143149241","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
Resonating quantum states and commensurability
IF 2.3 3区 物理与天体物理
Physics Letters A Pub Date : 2025-01-28 DOI: 10.1016/j.physleta.2024.130178
D. André Orna T. , Mauro M. Doria , Daniel Reyes
{"title":"Resonating quantum states and commensurability","authors":"D. André Orna T. ,&nbsp;Mauro M. Doria ,&nbsp;Daniel Reyes","doi":"10.1016/j.physleta.2024.130178","DOIUrl":"10.1016/j.physleta.2024.130178","url":null,"abstract":"<div><div>We find quantum states that are spatially localized by two potential barriers due to commensurability between the total length of the system and the distance between the barriers. Such states are resonant because they coexist with nearly continuum states, as found in the present one-dimensional Schrödinger equation investigation. They exist even in the case of weak and thin barriers, and we discuss them here in the context of conducting films made by bismuth whose mean free path is abnormally large.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"531 ","pages":"Article 130178"},"PeriodicalIF":2.3,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143149243","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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