Physical Review B最新文献

{"title":"Ambipolar doping of a charge-transfer insulator in the Emery model","authors":"G. Sordi, G. L. Reaney, N. Kowalski, P. Sémon, A.-M. S. Tremblay","doi":"10.1103/physrevb.111.045117","DOIUrl":"https://doi.org/10.1103/physrevb.111.045117","url":null,"abstract":"Understanding the similarities and differences between adding or removing electrons from a charge-transfer insulator may provide insights about the origin of the electron-hole asymmetry found in cuprates. Here we study with cellular dynamical mean-field theory the Emery model set in the charge-transfer insulator regime, and dope it with either electrons or holes. We consider the normal state only and focus on the doping evolution of the orbital character of the dopants and on the nature of the doping-driven transition. Regarding the orbital character of the dopants, we found an electron-hole asymmetry: doped electrons mostly enter the copper orbitals, whereas doped holes mostly enter the oxygen orbitals. Regarding the nature of the doping-driven transition, we found no qualitative electron-hole asymmetry: On either electron or hole doping, there is a two-stage transition from a charge-transfer insulator to a strongly correlated pseudogap and then to a metal. This shows that a strongly correlated pseudogap is an emergent feature of doped correlated insulators in two dimensions, in qualitative agreement with recent experiments on ambipolar Sr</a:mi>1</a:mn>−</a:mo>x</a:mi></a:mrow></a:msub>La</a:mi>x</a:mi></a:msub>CuO</a:mi>2</a:mn>+</a:mo>y</a:mi></a:mrow></a:msub></a:mrow></a:math> cuprate films. Our results indicate that merely doping with holes or electrons a charge-transfer insulator is not sufficient for explaining the electron-hole asymmetry observed in the normal state phase diagram of cuprates. Our work reinforces the view that actual hole-doped cuprates are more correlated than their electron-doped counterparts. <jats:supplementary-material> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2025</jats:copyright-year> </jats:permissions> </jats:supplementary-material>","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":"13 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142936262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Plasmon-enhanced Brillouin light scattering spectroscopy for magnetic systems. II. Numerical simulations","authors":"Yurii Demydenko, Taras Vasiliev, Khrystyna O. Levchenko, Andrii V. Chumak, Valeri Lozovski","doi":"10.1103/physrevb.111.014405","DOIUrl":"https://doi.org/10.1103/physrevb.111.014405","url":null,"abstract":"Brillouin light scattering (BLS) spectroscopy is a powerful tool for detecting spin waves in magnetic thin films and nanostructures. Despite comprehensive access to spin-wave properties, BLS spectroscopy suffers from the limited wave number of detectable spin waves and the typically relatively low sensitivity. In this paper, we present the results of numerical simulations based on the recently developed analytical model describing plasmon-enhanced BLS. Effective susceptibility is defined for a single plasmonic nanoparticle in the shape of an ellipsoid of rotation, for the sandwiched plasmonic nanoparticles separated by a dielectric spacer, as well as for the array of plasmonic resonators on the surface of a magnetic film. It is shown that the eccentricity of the metal nanoparticles, describing their shape, plays a leading role in enhancing the BLS signal. The optimal conditions for BLS enhancement are numerically defined for gold and silver plasmon systems for photons of different energies. The presented results define the roadmap for the experimental realization of plasmon-enhanced BLS spectroscopy. <jats:supplementary-material> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2025</jats:copyright-year> </jats:permissions> </jats:supplementary-material>","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":"8 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142936052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Two-scale effective model for defect-induced localization transitions in non-Hermitian systems","authors":"B. Davies, S. Barandun, E. O. Hiltunen, R. V. Craster, H. Ammari","doi":"10.1103/physrevb.111.035109","DOIUrl":"https://doi.org/10.1103/physrevb.111.035109","url":null,"abstract":"We illuminate the fundamental mechanism responsible for the transition between the non-Hermitian skin effect and defect-induced localization in the bulk. We study a Hamiltonian with nonreciprocal couplings that exhibits the skin effect (the localization of all eigenvectors at one edge) and add an on-site defect in the center. Using a two-scale asymptotic method, we characterize the long-scale growth and decay of the eigenvectors and derive a simple and intuitive effective model for the transition that occurs when the defect is sufficiently large that one of the modes is localized at the defect site, rather than at the edge of the system. <jats:supplementary-material> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2025</jats:copyright-year> </jats:permissions> </jats:supplementary-material>","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":"27 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142929123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Phase separation in the putative fractional quantum Hall A phases","authors":"Steven H. Simon, Ajit C. Balram","doi":"10.1103/physrevb.111.045102","DOIUrl":"https://doi.org/10.1103/physrevb.111.045102","url":null,"abstract":"We use several techniques to probe the wave functions proposed to describe the A</a:mi></a:math> phases by Das, Das, and Mandal [; ; ]. As opposed to representing fractional quantum Hall liquids, we find these wave functions to describe states that clearly display strong phase separation. In the process of exploring these wave functions, we have also constructed several methods for diagnosing phase separation and generating such wave functions numerically. Finally, we uncover a property of entanglement spectra that can be used as a check for the accuracy of numerics. <jats:supplementary-material> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2025</jats:copyright-year> </jats:permissions> </jats:supplementary-material>","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":"66 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142917013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Impact of ion exchange on vibrational modes in Rb-doped KTiOPO4 : A Raman spectroscopy study on the interplay between ion exchange and polarization switching","authors":"Cherrie S. J. Lee, Carlota Canalias, Robin Buschbeck, Boris Koppitz, Franz Hempel, Zeeshan Amber, Lukas M. Eng, Michael Rüsing","doi":"10.1103/physrevb.110.214115","DOIUrl":"https://doi.org/10.1103/physrevb.110.214115","url":null,"abstract":"Recently, ion exchange (IE) has been used to periodically modify the coercive field (E&lt;/a:mi&gt;c&lt;/a:mi&gt;&lt;/a:msub&gt;&lt;/a:math&gt;) of the crystal prior to periodic poling, to fabricate fine-pitch domain structures in Rb-doped &lt;c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;c:mrow&gt;&lt;c:mi&gt;KTiOP&lt;/c:mi&gt;&lt;c:msub&gt;&lt;c:mi mathvariant=\"normal\"&gt;O&lt;/c:mi&gt;&lt;c:mn&gt;4&lt;/c:mn&gt;&lt;/c:msub&gt;&lt;/c:mrow&gt;&lt;/c:math&gt; (RKTP). Here, we use micro-Raman spectroscopy to understand the impact of IE on the vibrational modes related to the Rb/K lattice sites, &lt;e:math xmlns:e=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;e:mrow&gt;&lt;e:mi&gt;Ti&lt;/e:mi&gt;&lt;e:msub&gt;&lt;e:mi mathvariant=\"normal\"&gt;O&lt;/e:mi&gt;&lt;e:mn&gt;6&lt;/e:mn&gt;&lt;/e:msub&gt;&lt;/e:mrow&gt;&lt;/e:math&gt; octahedra, and &lt;g:math xmlns:g=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;g:mrow&gt;&lt;g:mi mathvariant=\"normal\"&gt;P&lt;/g:mi&gt;&lt;g:msub&gt;&lt;g:mi mathvariant=\"normal\"&gt;O&lt;/g:mi&gt;&lt;g:mn&gt;4&lt;/g:mn&gt;&lt;/g:msub&gt;&lt;/g:mrow&gt;&lt;/g:math&gt; tetrahedra, which all form the basis of the RKTP crystal structure. We analyze the Raman spectra of three different RKTP samples: (1) a RKTP sample that shows a poled domain grating only, (2) a RKTP sample that has an &lt;j:math xmlns:j=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;j:msub&gt;&lt;j:mi&gt;E&lt;/j:mi&gt;&lt;j:mi mathvariant=\"normal\"&gt;c&lt;/j:mi&gt;&lt;/j:msub&gt;&lt;/j:math&gt; grating only, and (3) a RKTP sample that has both an &lt;l:math xmlns:l=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;l:msub&gt;&lt;l:mi&gt;E&lt;/l:mi&gt;&lt;l:mi mathvariant=\"normal\"&gt;c&lt;/l:mi&gt;&lt;/l:msub&gt;&lt;/l:math&gt; and a domain grating of the nominally same spacing. This allows us to determine the impact of IE on the vibrational modes of RKTP. We characterize the changes in the lower Raman peaks related to the alkali-metal ions, as well as observe lattice modifications induced by the incorporation of &lt;n:math xmlns:n=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;n:mrow&gt;&lt;n:mi mathvariant=\"normal\"&gt;R&lt;/n:mi&gt;&lt;n:msup&gt;&lt;n:mrow&gt;&lt;n:mi mathvariant=\"normal\"&gt;b&lt;/n:mi&gt;&lt;/n:mrow&gt;&lt;n:mo&gt;+&lt;/n:mo&gt;&lt;/n:msup&gt;&lt;/n:mrow&gt;&lt;/n:math&gt; that extend further into the crystal bulk than the expected IE depth. Moreover, the influence of IE on the domain walls is also manifested in their Raman peak shift. We discuss our results in terms of the deformation of the &lt;q:math xmlns:q=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;q:mrow&gt;&lt;q:mi mathvariant=\"normal\"&gt;P&lt;/q:mi&gt;&lt;q:msub&gt;&lt;q:mi mathvariant=\"normal\"&gt;O&lt;/q:mi&gt;&lt;q:mn&gt;4&lt;/q:mn&gt;&lt;/q:msub&gt;&lt;/q:mrow&gt;&lt;/q:math&gt; and &lt;t:math xmlns:t=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;t:mrow&gt;&lt;t:mi&gt;Ti&lt;/t:mi&gt;&lt;t:msub&gt;&lt;t:mi mathvariant=\"normal\"&gt;O&lt;/t:mi&gt;&lt;t:mn&gt;6&lt;/t:mn&gt;&lt;/t:msub&gt;&lt;/t:mrow&gt;&lt;/t:math&gt; groups. Our results highlight the intricate impact of IE on the crystal structure and how it facilitates periodic poling, paving the way for further development of the &lt;v:math xmlns:v=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;v:msub&gt;&lt;v:mi&gt;E&lt;/v:mi&gt;&lt;v:mi mathvariant=\"normal\"&gt;c&lt;/v:mi&gt;&lt;/v:msub&gt;&lt;/v:math&gt;-engineering technique. &lt;jats:supplementary-material&gt; &lt;jats:copyright-statement&gt;Published by the American Physical Society&lt;/jats:copyright-statement&gt; &lt;jats:copyright-year&gt;2024&lt;/jats:copyright-year&gt; &lt;/jats:permissions&gt; &lt;/jats:supplementary-mat","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":"4 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142902024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Quantum Monte Carlo study of the phase diagram of the two-dimensional uniform electron liquid","authors":"Sam Azadi, N. D. Drummond, Sam M. Vinko","doi":"10.1103/physrevb.110.245145","DOIUrl":"https://doi.org/10.1103/physrevb.110.245145","url":null,"abstract":"We present a study of spin-unpolarized and spin-polarized two-dimensional uniform electron liquids using variational and diffusion quantum Monte Carlo (VMC and DMC) methods with Slater-Jastrow-backflow trial wave functions. Ground-state VMC and DMC energies are obtained in the density range 1</a:mn>≤</a:mo>r</a:mi>s</a:mtext></a:msub>≤</a:mo>40</a:mn></a:mrow></a:math>. Single-particle and many-body finite-size errors are corrected using canonical-ensemble twist-averaged boundary conditions and extrapolation of twist-averaged energies to the thermodynamic limit of infinite system size. System-size-dependent errors in Slater-Jastrow-backflow DMC energies caused by partially converged VMC energy minimization calculations are discussed. We find that, for <b:math xmlns:b=\"http://www.w3.org/1998/Math/MathML\"><b:mrow><b:mn>1</b:mn><b:mo>≤</b:mo><b:msub><b:mi>r</b:mi><b:mtext>s</b:mtext></b:msub><b:mo>≤</b:mo><b:mn>5</b:mn></b:mrow></b:math>, optimizing the backflow function at each twist lowers the twist-averaged DMC energy at finite system size. However, nonsystematic system-size-dependent effects remain in the DMC energies, which can be partially removed by extrapolation from multiple finite system sizes to infinite system size. The DMC energies in the thermodynamic limit are used to parametrize a local spin density approximation correlation functional for inhomogeneous electron systems. Our zero-temperature phase diagram shows a single transition from a paramagnetic fluid to a hexagonal Wigner crystal at <c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\"><c:mrow><c:msub><c:mi>r</c:mi><c:mtext>s</c:mtext></c:msub><c:mo>=</c:mo><c:mn>35</c:mn><c:mrow><c:mo>(</c:mo><c:mn>1</c:mn><c:mo>)</c:mo></c:mrow></c:mrow></c:math>, with no region of stability for a ferromagnetic fluid. <jats:supplementary-material> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2024</jats:copyright-year> </jats:permissions> </jats:supplementary-material>","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":"3 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142902094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Light-controlled terahertz plasmonic time-varying media: Momentum gaps, entangled plasmon pairs, and pulse-induced time reversal","authors":"Egor I. Kiselev, Yiming Pan, Netanel H. Lindner","doi":"10.1103/physrevb.110.l241411","DOIUrl":"https://doi.org/10.1103/physrevb.110.l241411","url":null,"abstract":"This Letter establishes a Floquet engineering framework in which coherent high frequency light with a time dependent amplitude can be used to parametrically excite and amplify THz plasmons, mirror plasmonic wave packets in time, and generate momentum-gapped plasmonic band structures, entangled plasmon pairs, and THz radiation in two dimensional Dirac systems. Our results show how low frequency plasmons can be coherently excited and manipulated without the need for THz light. <jats:supplementary-material> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2024</jats:copyright-year> </jats:permissions> </jats:supplementary-material>","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":"10 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142901978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Exceptional Luttinger liquids from sublattice-dependent interaction","authors":"Joachim Schwardt, Benjamin Michen, Carl Lehmann, Jan Carl Budich","doi":"10.1103/physrevb.110.245146","DOIUrl":"https://doi.org/10.1103/physrevb.110.245146","url":null,"abstract":"We demonstrate how exceptional points (EPs) naturally occur in the Luttinger liquid (LL) theory describing the low-energy excitations of a microscopic lattice model with sublattice-dependent electron-electron interaction. Upon bosonization, this sublattice dependence directly translates to a nonstandard sine-Gordon-type term responsible for the non-Hermitian matrix structure of the single-particle Green function (GF). As the structure in the lifetime of excitations does not commute with the underlying free Bloch Hamiltonian, non-Hermitian topological properties of the single-particle GF emerge—despite our Hermitian model Hamiltonian. Both finite temperature and a nontrivial Luttinger parameter K</a:mi>≠</a:mo>1</a:mn></a:mrow></a:math> are required for the formation of EPs, and their topological stability in one spatial dimension is guaranteed by the chiral symmetry of our model. In the presence of the aforementioned sine-Gordon term, we resort to leading-order perturbation theory (PT) to compute the single-particle GF. All qualitative findings derived within LL theory are corroborated by comparison to both numerical simulations within the conserving second Born approximation and, for weak interactions and high temperatures, by fermionic plain PT. In certain parameter regimes, quantitative agreement can be reached by a suitable parameter choice in the effective bosonized model. <jats:supplementary-material> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2024</jats:copyright-year> </jats:permissions> </jats:supplementary-material>","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":"5 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142902022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Electronic structure studies of Ni1−xVx across the critical concentration for ferromagnetic to paramagnetic transition","authors":"Jaskirat Brar, Sharshad K., B. H. Reddy, Asif Ali, Sakshi Bansal, R. S. Singh, R. Bindu","doi":"10.1103/physrevb.110.235158","DOIUrl":"https://doi.org/10.1103/physrevb.110.235158","url":null,"abstract":"","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":"65 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Topological phase transitions in perovskite superlattices driven by temperature, electric field, and doping","authors":"Jiyuan Yang, Shi Liu","doi":"10.1103/physrevb.110.214112","DOIUrl":"https://doi.org/10.1103/physrevb.110.214112","url":null,"abstract":"","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":"50 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}