Physical Review B最新文献_第9页

Separating spin dynamics modes in iron oxide nanoparticles 分离氧化铁纳米粒子中的自旋动力学模式

IF 3.7 2区物理与天体物理

Physical Review B Pub Date : 2025-02-11 DOI: 10.1103/physrevb.111.l060406

M. Zobel, M. Appel, S. L. J. Thomä, M. Plekhanov, A. Magerl

引用次数: 0

Electron irradiation effects on monolayer MoS2 at elevated temperatures

IF 3.7 2区物理与天体物理

Physical Review B Pub Date : 2025-02-10 DOI: 10.1103/physrevb.111.054107

Carsten Speckmann, Kimmo Mustonen, Diana Propst, Clemens Mangler, Jani Kotakoski

{"title":"Electron irradiation effects on monolayer MoS2 at elevated temperatures","authors":"Carsten Speckmann, Kimmo Mustonen, Diana Propst, Clemens Mangler, Jani Kotakoski","doi":"10.1103/physrevb.111.054107","DOIUrl":"https://doi.org/10.1103/physrevb.111.054107","url":null,"abstract":"The effect of electron irradiation on two-dimensional (2D) materials is an important topic, both for the correct interpretation of electron microscopy experiments and for possible applications in electron lithography. After the importance of including inelastic scattering damage in theoretical models describing beam damage and the lack of oxygen sensitivity under electron irradiation in 2D MoS</a:mi>2</a:mn></a:msub></a:math> were recently shown, the role of temperature has remained unexplored on a quantitative level. Here we show the effect of temperature on the creation of individual defects and the effect of temperature on defect dynamics. Based on the measured displacement cross section of sulfur atoms in <b:math xmlns:b=\"http://www.w3.org/1998/Math/MathML\"><b:msub><b:mi>MoS</b:mi><b:mn>2</b:mn></b:msub></b:math> by atomic resolution scanning transmission electron microscopy, we find an increased probability for defect creation for temperatures up to <c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\"><c:mrow><c:mn>150</c:mn><c:msup><c:mspace width=\"0.16em\"/><c:mo>∘</c:mo></c:msup><c:mi mathvariant=\"normal\">C</c:mi></c:mrow></c:math>, in accordance with theoretical predictions. However, higher temperatures lead to a decrease of the observed cross sections. Despite this apparent decrease, we find that the elevated temperature does not mitigate the creation of defects as this observation would suggest, but rather hides the created damage due to rapid thermal diffusion of the created vacancies before their detection, leading to the formation of vacancy lines and pores outside the measurement's field of view. Using the experimental data in combination with previously reported theoretical models for the displacement cross section, we estimate the migration energy barrier of sulfur vacancies in <f:math xmlns:f=\"http://www.w3.org/1998/Math/MathML\"><f:msub><f:mi>MoS</f:mi><f:mn>2</f:mn></f:msub></f:math> to be <g:math xmlns:g=\"http://www.w3.org/1998/Math/MathML\"><g:mrow><g:mn>0.26</g:mn><g:mo>±</g:mo><g:mn>0.13</g:mn><g:mspace width=\"0.16em\"/><g:mi>eV</g:mi></g:mrow></g:math>. These results mark another step towards the complete understanding of electron beam damage in <i:math xmlns:i=\"http://www.w3.org/1998/Math/MathML\"><i:msub><i:mi>MoS</i:mi><i:mn>2</i:mn></i:msub></i:math>. Published by the American Physical Society 2025 ","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":"47 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143385317","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}

引用次数: 0

Magnetic properties of the zigzag ladder compound SrTb2O4

IF 3.7 2区物理与天体物理

Physical Review B Pub Date : 2025-02-10 DOI: 10.1103/physrevb.111.054415

F. Orlandi, M. Ciomaga Hatnean, D. A. Mayoh, J. P. Tidey, S. X. M. Riberolles, G. Balakrishnan, P. Manuel, D. D. Khalyavin, H. C. Walker, M. D. Le, B. Ouladdiaf, A. R. Wildes, N. Qureshi, O. A. Petrenko

{"title":"Magnetic properties of the zigzag ladder compound SrTb2O4","authors":"F. Orlandi, M. Ciomaga Hatnean, D. A. Mayoh, J. P. Tidey, S. X. M. Riberolles, G. Balakrishnan, P. Manuel, D. D. Khalyavin, H. C. Walker, M. D. Le, B. Ouladdiaf, A. R. Wildes, N. Qureshi, O. A. Petrenko","doi":"10.1103/physrevb.111.054415","DOIUrl":"https://doi.org/10.1103/physrevb.111.054415","url":null,"abstract":"We report on the properties of SrTb</a:mi>2</a:mn></a:msub>O</a:mi>4</a:mn></a:msub></a:mrow></a:math>, a frustrated zigzag ladder antiferromagnet, studied by single crystal neutron diffraction (with polarized neutrons in zero field and unpolarized neutrons in an applied magnetic field), as well as by neutron spectroscopy on a polycrystalline sample. The neutron scattering results are supported by single-crystal magnetization and heat capacity measurements. In zero field, neutron diffraction data show no transition to a magnetically ordered state down to the lowest experimentally available temperature of 35 mK, and the material remains magnetically disordered down to this temperature. Polarized neutron diffraction measurements reveal the presence of a diffuse scattering signal suggesting only very weak spin-spin correlations in the ground state. For <c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\"><c:mrow><c:mi>H</c:mi><c:mo>∥</c:mo><c:mi>c</c:mi></c:mrow></c:math> (the easy magnetization direction), we followed the magnetization process using neutron diffraction measurements and observed the appearance of field-induced magnetic Bragg peaks with integer <d:math xmlns:d=\"http://www.w3.org/1998/Math/MathML\"><d:mi>h</d:mi></d:math> and <e:math xmlns:e=\"http://www.w3.org/1998/Math/MathML\"><e:mi>k</e:mi></e:math> indices in the <f:math xmlns:f=\"http://www.w3.org/1998/Math/MathML\"><f:mrow><f:mo>(</f:mo><f:mi>h</f:mi><f:mi>k</f:mi><f:mn>0</f:mn><f:mo>)</f:mo></f:mrow></f:math> scattering plane. No magnetic peaks with a nonzero propagation vector were detected. The observed in-field data fit well to a simple two-sublattice model with magnetic moments aligned along the field direction but being significantly different in magnitude for the two inequivalent <g:math xmlns:g=\"http://www.w3.org/1998/Math/MathML\"><g:msup><g:mrow><g:mi>Tb</g:mi></g:mrow><g:mrow><g:mn>3</g:mn><g:mo>+</g:mo></g:mrow></g:msup></g:math> sites in the unit cell. Overall, the collected data point to a nonmagnetic ground state in <h:math xmlns:h=\"http://www.w3.org/1998/Math/MathML\"><h:mrow><h:msub><h:mi>SrTb</h:mi><h:mn>2</h:mn></h:msub><h:msub><h:mi mathvariant=\"normal\">O</h:mi><h:mn>4</h:mn></h:msub></h:mrow></h:math> despite the presence of strong interactions. Published by the American Physical Society 2025 ","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":"55 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143385316","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}

引用次数: 0

Berry phase effects on the transverse conductivity of Fermi surfaces and their detection via spin qubit noise magnetometry

IF 3.7 2区物理与天体物理

Physical Review B Pub Date : 2025-02-07 DOI: 10.1103/physrevb.111.075406

Mark Morgenthaler, Inti Sodemann Villadiego

{"title":"Berry phase effects on the transverse conductivity of Fermi surfaces and their detection via spin qubit noise magnetometry","authors":"Mark Morgenthaler, Inti Sodemann Villadiego","doi":"10.1103/physrevb.111.075406","DOIUrl":"https://doi.org/10.1103/physrevb.111.075406","url":null,"abstract":"The quasistatic transverse conductivity of clean Fermi liquids at long wavelengths displays a remarkably universal behavior: it is determined solely by the radius of curvature of the Fermi surface and does not depend on details such as the quasiparticle mass or their interactions. Here we demonstrate that Berry phases do not alter such universality by directly computing the transverse conductivity of two-dimensional electronic systems with Dirac dispersions, such as those appearing in graphene and its chiral multilayer variants. Interestingly, however, such universality ceases to hold at wave vectors comparable to the Fermi radius, where Dirac fermions display a vividly distinct transverse conductivity relative to parabolic Fermions, with a rich wave vector dependence that includes divergences, oscillations, and zeros. We discuss how this can be probed by measuring the T</a:mi>1</a:mn></a:msub></a:math> relaxation time of spin qubits, such as NV centers or nuclear spins, placed near such 2D systems. Published by the American Physical Society 2025 ","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":"13 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143258156","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}

引用次数: 0

Theory of terahertz-driven magnetic switching in rare-earth orthoferrites: The case of TmFeO3

IF 3.7 2区物理与天体物理

Physical Review B Pub Date : 2025-02-07 DOI: 10.1103/physrevb.111.064411

N. R. Vovk, E. V. Ezerskaya, R. V. Mikhaylovskiy

{"title":"Theory of terahertz-driven magnetic switching in rare-earth orthoferrites: The case of TmFeO3","authors":"N. R. Vovk, E. V. Ezerskaya, R. V. Mikhaylovskiy","doi":"10.1103/physrevb.111.064411","DOIUrl":"https://doi.org/10.1103/physrevb.111.064411","url":null,"abstract":"We report a theoretical formalism that describes a dynamic magnetic response of rare-earth orthoferrites, particularly those with non-Kramers rare-earth () ions, when driven by strong terahertz fields. We derive a total thermodynamic potential for the exchange coupled -Fe system by constructing an effective Hamiltonian and employing a mean-field theory approximation. We investigate static properties of the and Fe subsystems across the spin-reorientation phase transitions and obtain resonance frequencies for Fe and magnetic sublattices as a function of temperature. Taking an example of the archetypical orthoferrite TmFe</a:mi>O</a:mi>3</a:mn></a:msub></a:mrow></a:math>, we perform numerical modeling to accurately describe the behavior of its anisotropy functions vs temperature. Finally, we analyze switching dynamics of Fe spins and nonlinear effects in the subsystem of <c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\"><c:mrow><c:mi>TmFe</c:mi><c:msub><c:mi mathvariant=\"normal\">O</c:mi><c:mn>3</c:mn></c:msub></c:mrow></c:math> driven by strong terahertz radiation. Published by the American Physical Society 2025 ","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":"40 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143258023","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}

引用次数: 0

Unoccupied electronic states of Fe3O4 (100): An angle-resolved inverse-photoemission study

IF 3.7 2区物理与天体物理

Physical Review B Pub Date : 2025-02-07 DOI: 10.1103/physrevb.111.075117

Jan Bieling, Markus Donath

{"title":"Unoccupied electronic states of Fe3O4 (100): An angle-resolved inverse-photoemission study","authors":"Jan Bieling, Markus Donath","doi":"10.1103/physrevb.111.075117","DOIUrl":"https://doi.org/10.1103/physrevb.111.075117","url":null,"abstract":"We present an experimental study that offers first insights into the unoccupied electronic states of a pristine (</a:mo>2</a:mn></a:msqrt>×</a:mo>2</a:mn></a:msqrt>)</a:mo></a:mrow>R</a:mtext>45</a:mn>∘</a:mo></a:msup></a:mrow></a:math> reconstructed <c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\"><c:mrow><c:msub><c:mi>Fe</c:mi><c:mn>3</c:mn></c:msub><c:msub><c:mi mathvariant=\"normal\">O</c:mi><c:mn>4</c:mn></c:msub></c:mrow></c:math>(100) surface. We initially demonstrate the successful sample preparation by analyzing the surface periodicity and chemical composition by low-energy electron diffraction and Auger electron spectroscopy, respectively. Using angle-resolved inverse photoemission, we study the unoccupied electronic states. We observe three nondispersive emissions, one dominant feature around <e:math xmlns:e=\"http://www.w3.org/1998/Math/MathML\"><e:mrow><e:mn>2</e:mn><e:mspace width=\"0.16em\"/><e:mi>eV</e:mi></e:mrow></e:math> above the Fermi level and two additional ones at higher energies. For the low-lying triple-split feature, we propose two possible interpretations based on former theoretical studies. We either ascribe it to <g:math xmlns:g=\"http://www.w3.org/1998/Math/MathML\"><g:mn>3</g:mn><g:mi>d</g:mi></g:math>-related bandgroups originating from tetrahedrally and octahedrally coordinated bulk iron atoms or attribute it to a mixture of <h:math xmlns:h=\"http://www.w3.org/1998/Math/MathML\"><h:mn>3</h:mn><h:mi>d</h:mi></h:math> states originating from octahedrally coordinated iron atoms within the bulk and the reconstructed surface layer. The high-lying features are ascribed to bulk bands based on the experimentally observed characteristics. Published by the American Physical Society 2025 ","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":"20 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143258157","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}

引用次数: 0

Diffusion in liquid metals is directed by competing collective modes

IF 3.7 2区物理与天体物理

Physical Review B Pub Date : 2025-02-06 DOI: 10.1103/physrevb.111.l081104

Franz Demmel, Noel Jakse

{"title":"Diffusion in liquid metals is directed by competing collective modes","authors":"Franz Demmel, Noel Jakse","doi":"10.1103/physrevb.111.l081104","DOIUrl":"https://doi.org/10.1103/physrevb.111.l081104","url":null,"abstract":"The self-diffusion process in a dense liquid is influenced by collective particle movements. Extensive molecular dynamics simulations for liquid aluminium and rubidium evidence a crossover in the diffusion coefficient at about 1.4 times the melting temperature T</a:mi>m</a:mi></a:msub></a:math>, indicating a profound change in the diffusion mechanism. The corresponding velocity autocorrelation functions demonstrate a decrease of the cage effect with a gradual set in of a power-law decay, they celebrate long time tail. This behavior is caused by a competition of density fluctuations near the melting point with vortex-type particle patterns from transverse currents in the hot fluid. The investigation of the velocity autocorrelation function evidences a gradual transition in dynamics with rising temperature. The competition between these two collective particle movements, one hindering and one enhancing the diffusion process, leads to a non-Arrhenius-type behavior of the diffusion coefficient around <b:math xmlns:b=\"http://www.w3.org/1998/Math/MathML\"><b:mrow><b:mn>1.4</b:mn><b:mspace width=\"0.16em\"/><b:msub><b:mi>T</b:mi><b:mi>m</b:mi></b:msub></b:mrow></b:math>, which signals the transition from a dense to a fluidlike liquid dynamics in the potential energy landscape picture. Published by the American Physical Society 2025 ","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":"140 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143258025","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}

引用次数: 0

Transverse voltage in anisotropic hydrodynamic conductors

IF 3.7 2区物理与天体物理

Physical Review B Pub Date : 2025-02-06 DOI: 10.1103/physrevb.111.l081402

Kaize Wang, Chunyu Guo, Philip J. W. Moll, Tobias Holder

{"title":"Transverse voltage in anisotropic hydrodynamic conductors","authors":"Kaize Wang, Chunyu Guo, Philip J. W. Moll, Tobias Holder","doi":"10.1103/physrevb.111.l081402","DOIUrl":"https://doi.org/10.1103/physrevb.111.l081402","url":null,"abstract":"Weak momentum dissipation in ultraclean metals gives rise to novel non-Ohmic current flow, including ballistic and hydrodynamic regimes. Recently, hydrodynamic flow has attracted intense interest because it presents a valuable window into the electronic correlations and the longest lived collective modes of quantum materials. However, diagnosing viscous flow is difficult as the macroscopic observables of ballistic and hydrodynamic transport such as the average current distribution can be deceptively similar, even if their respective microscopics deviate notably. Based on kinetic Boltzmann theory, here we propose to address this issue via the transverse channel voltage at zero magnetic field, which can efficiently detect hydrodynamic flow in a number of materials. To this end, we show that the transverse voltage is sensitive to the interplay between anisotropic fermiology and boundary scattering, resulting in a nontrivial behavior in narrow channels along crystalline low-symmetry directions. We discuss several materials where the channel-size dependent stress of the quantum fluid leads to a characteristic sign change of the transverse voltage as a new hallmark of the crossover from the ballistic to the hydrodynamic regime. Published by the American Physical Society 2025 ","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":"79 2 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143258158","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}

引用次数: 0

Kohn-Sham-Proca equations for ultrafast exciton dynamics

IF 3.7 2区物理与天体物理

Physical Review B Pub Date : 2025-02-06 DOI: 10.1103/physrevb.111.l060302

J. K. Dewhurst, D. Gill, S. Shallcross, S. Sharma

{"title":"Kohn-Sham-Proca equations for ultrafast exciton dynamics","authors":"J. K. Dewhurst, D. Gill, S. Shallcross, S. Sharma","doi":"10.1103/physrevb.111.l060302","DOIUrl":"https://doi.org/10.1103/physrevb.111.l060302","url":null,"abstract":"A longstanding problem in time-dependent density functional theory has been the absence of a functional able to capture excitonic physics under laser pump conditions. Here we introduce a scheme of coupled Kohn-Sham and Proca equations in a pump-probe setup that we show (i) produces linear-response excitonic effects in the weak pump regime in excellent agreement with experiment, but also (ii) captures excitonic physics in the highly nonlinear regime of ultrafast strong laser pumping. In particular ”bleaching” (i.e., reduction) of the excitonic weight and the appearance of excitonic side bands is demonstrated. The approach is a procedural functional—the Kohn-Sham and Proca equations are simultaneously time propagated—allowing the straightforward inclusion of, for example, lattice and spin degrees of freedom into excitonic physics. The functional is shown to have universal applicability to a wide range of materials, and we also establish a relation between the parameters used in the functional and the exciton Bohr radii of the materials. Published by the American Physical Society 2025 ","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":"164 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143191796","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}

引用次数: 0

Adiabatic transformations in dissipative and non-Hermitian phase transitions

IF 3.7 2区物理与天体物理

Physical Review B Pub Date : 2025-02-06 DOI: 10.1103/physrevb.111.l081105

Pavel Orlov, Georgy V. Shlyapnikov, Denis V. Kurlov

引用次数: 0