Physical Review B最新文献

{"title":"Observable-enriched entanglement","authors":"Joe H. Winter, Reyhan Ay, Bernd Braunecker, A. M. Cook","doi":"10.1103/physrevb.111.165143","DOIUrl":"https://doi.org/10.1103/physrevb.111.165143","url":null,"abstract":"We introduce methods of characterizing entanglement on the example of the quantum skyrmion Hall effect, in which entanglement measures are enriched by the matrix representations of operators for observables. These observable operator matrix representations can enrich the partial trace over subsets of a system's degrees of freedom, yielding reduced density matrices useful in computing various measures of entanglement, which also preserve the observable expectation value. We focus here on applying these methods to compute entanglement spectra, unveiling bulk-boundary correspondences of canonical four-band models for topological skyrmion phases and their connection to simpler forms of bulk-boundary correspondence. Given the fundamental roles entanglement signatures and observables play in the study of quantum systems and the fundamental generalization of the interpretation and treatment of spin within the framework of the quantum skyrmion Hall effect, concepts of observable-enriched entanglement introduced here are broadly applicable to myriad problems of quantum systems. <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":"6 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143862107","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":"Magnetic field suppression of tomographic electron transport","authors":"Habib Rostami, Nitay Ben-Shachar, Sergej Moroz, Johannes Hofmann","doi":"10.1103/physrevb.111.155434","DOIUrl":"https://doi.org/10.1103/physrevb.111.155434","url":null,"abstract":"Degenerate two-dimensional electron liquids are theoretically established to possess two vastly distinct collisional electron mean free paths, where even-parity deformations of the Fermi surface are hydrodynamic with a short collisional mean free path but odd-parity deformations remain near ballistic (known as the “tomographic” transport regime). Predicted signatures of this regime rely on the scaling of observables with temperature or device dimension, both of which are difficult to establish with certainty. Here, we consider magnetotransport in a minimal model of tomographic electrons and show that even a small magnetic field suppresses tomographic transport signatures and thus acts as a sensitive and unique probe of this regime. Fundamentally, the magnetic field breaks time-reversal invariance, which is a prerequisite for the odd-even parity effect in the collisional relaxation. We analyze in detail the scaling of the transverse conductivity, which has been linked to small-channel conductance of interaction-dominated electrons, and show that a tomographic scaling regime at intermediate wave numbers is quickly suppressed with magnetic field to a hydrodynamic or collisionless form. We confirm that the suppression occurs at relatively small magnetic fields when the cyclotron radius is comparable to the ballistic mean free path of the dominant odd-parity mode. This occurs at a much smaller magnetic field than the magnetic field strength required to suppress hydrodynamic electron transport, which suggests an experimental protocol to extract the odd-parity mean free path. <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":"37 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143862337","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":"Pb-intercalated epitaxial graphene on SiC: Full insight into band structure and orbital character of interlayer Pb, and charge transfer into graphene","authors":"Bharti Matta, Philipp Rosenzweig, Kathrin Küster, Craig Polley, Ulrich Starke","doi":"10.1103/physrevb.111.155435","DOIUrl":"https://doi.org/10.1103/physrevb.111.155435","url":null,"abstract":"Intercalation is a robust approach for modulating the properties of epitaxial graphene on SiC and stabilizing two-dimensional intercalant layers at the graphene/SiC interface. In this paper, we present synchrotron-based angle resolved photoelectron spectroscopy (ARPES) measurements focusing on the band structure of intercalated Pb under a single layer of epitaxial graphene. The interlayer Pb exhibits a metallic character, a (1</a:mn>×</a:mo>1</a:mn></a:mrow></a:math>) registry with respect to SiC, and free-electron-like bands to first order. Divergences from the free-electron approximation include various band splittings and gaps throughout the Pb Brillouin zone. Light polarization-dependent ARPES measurements indicate a predominant out-of-plane orbital character for the Pb bands, suggesting potential interactions between the interlayer Pb and graphene's <b:math xmlns:b=\"http://www.w3.org/1998/Math/MathML\"><b:mi>π</b:mi></b:math> orbitals that may induce proximity effects in graphene. Density functional theory calculations for a (<c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\"><c:mrow><c:mn>1</c:mn><c:mo>×</c:mo><c:mn>1</c:mn></c:mrow></c:math>) Pb monolayer on SiC show reasonable qualitative agreement with the experimentally observed interlayer bands as well as the polarization-dependent measurements. Finally, temperature-dependent ARPES measurements reveal that the nearly charge-neutral graphene layer involves charge transfer from both the interlayer Pb and the substrate SiC. <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":"12 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143862106","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":"Ternary nickel hydrides: A platform for unconventional superconductivity and quantum magnetism","authors":"Mateusz Domański, Antonio Santacesaria, Paolo Barone, José Lorenzana, Wojciech Grochala","doi":"10.1103/physrevb.111.165137","DOIUrl":"https://doi.org/10.1103/physrevb.111.165137","url":null,"abstract":"Hydrides are famous for the possibility of reaching high-T&lt;/a:mi&gt;c&lt;/a:mi&gt;&lt;/a:msub&gt;&lt;/a:math&gt; superconductivity under high pressure within a conventional mechanism. Here we propose ternary nickel hydrides &lt;c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;c:mrow&gt;&lt;c:mi&gt;M&lt;/c:mi&gt;&lt;c:mi&gt;Ni&lt;/c:mi&gt;&lt;c:msub&gt;&lt;c:mi mathvariant=\"normal\"&gt;H&lt;/c:mi&gt;&lt;c:mn&gt;2&lt;/c:mn&gt;&lt;/c:msub&gt;&lt;/c:mrow&gt;&lt;/c:math&gt; (&lt;e:math xmlns:e=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;e:mrow&gt;&lt;e:mi&gt;M&lt;/e:mi&gt;&lt;e:mo&gt;=&lt;/e:mo&gt;&lt;e:mi&gt;Li&lt;/e:mi&gt;&lt;/e:mrow&gt;&lt;/e:math&gt;, Na) as materials that mirror key aspects of unconventional superconducting cuprates and nickelates while presenting unique characteristics. Compared to Ni oxides, Ni-H bands are wider due to shorter bond lengths and show a smaller charge-transfer energy. This leads to a larger scale of magnetic interactions than for &lt;f:math xmlns:f=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;f:mrow&gt;&lt;f:mi&gt;LaNi&lt;/f:mi&gt;&lt;f:msub&gt;&lt;f:mi mathvariant=\"normal\"&gt;O&lt;/f:mi&gt;&lt;f:mn&gt;2&lt;/f:mn&gt;&lt;/f:msub&gt;&lt;/f:mrow&gt;&lt;/f:math&gt;, which previous works in cuprates suggest should lead to a larger &lt;h:math xmlns:h=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;h:msub&gt;&lt;h:mi&gt;T&lt;/h:mi&gt;&lt;h:mi mathvariant=\"normal\"&gt;c&lt;/h:mi&gt;&lt;/h:msub&gt;&lt;/h:math&gt;. The presence of an interstitial anionic electron orbital, which hybridizes with the &lt;j:math xmlns:j=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;j:msub&gt;&lt;j:mi&gt;d&lt;/j:mi&gt;&lt;j:msup&gt;&lt;j:mrow&gt;&lt;j:mi&gt;z&lt;/j:mi&gt;&lt;/j:mrow&gt;&lt;j:mn&gt;2&lt;/j:mn&gt;&lt;/j:msup&gt;&lt;/j:msub&gt;&lt;/j:math&gt; band, induces self-doping in the Ni &lt;k:math xmlns:k=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;k:msub&gt;&lt;k:mi&gt;d&lt;/k:mi&gt;&lt;k:mrow&gt;&lt;k:msup&gt;&lt;k:mrow&gt;&lt;k:mi&gt;x&lt;/k:mi&gt;&lt;/k:mrow&gt;&lt;k:mn&gt;2&lt;/k:mn&gt;&lt;/k:msup&gt;&lt;k:mo&gt;−&lt;/k:mo&gt;&lt;k:msup&gt;&lt;k:mrow&gt;&lt;k:mi&gt;y&lt;/k:mi&gt;&lt;/k:mrow&gt;&lt;k:mn&gt;2&lt;/k:mn&gt;&lt;/k:msup&gt;&lt;/k:mrow&gt;&lt;/k:msub&gt;&lt;/k:math&gt; band, enabling metallicity and superconductivity in stoichiometric forms. A &lt;l:math xmlns:l=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;l:mi&gt;t&lt;/l:mi&gt;&lt;l:mo&gt;−&lt;/l:mo&gt;&lt;l:mrow&gt;&lt;l:mi&gt;J&lt;/l:mi&gt;&lt;/l:mrow&gt;&lt;/l:math&gt; model computation yields dominant &lt;m:math xmlns:m=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;m:msub&gt;&lt;m:mi&gt;d&lt;/m:mi&gt;&lt;m:mrow&gt;&lt;m:msup&gt;&lt;m:mrow&gt;&lt;m:mi&gt;x&lt;/m:mi&gt;&lt;/m:mrow&gt;&lt;m:mn&gt;2&lt;/m:mn&gt;&lt;/m:msup&gt;&lt;m:mo&gt;−&lt;/m:mo&gt;&lt;m:msup&gt;&lt;m:mrow&gt;&lt;m:mi&gt;y&lt;/m:mi&gt;&lt;/m:mrow&gt;&lt;m:mn&gt;2&lt;/m:mn&gt;&lt;/m:msup&gt;&lt;/m:mrow&gt;&lt;/m:msub&gt;&lt;/m:math&gt; superconducting symmetry for all doping levels. This, combined with the improved thermodynamic stability over known &lt;n:math xmlns:n=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;n:mrow&gt;&lt;n:mi mathvariant=\"normal\"&gt;N&lt;/n:mi&gt;&lt;n:msup&gt;&lt;n:mrow&gt;&lt;n:mi mathvariant=\"normal\"&gt;i&lt;/n:mi&gt;&lt;/n:mrow&gt;&lt;n:mrow&gt;&lt;n:mn&gt;1&lt;/n:mn&gt;&lt;n:mo&gt;+&lt;/n:mo&gt;&lt;/n:mrow&gt;&lt;/n:msup&gt;&lt;/n:mrow&gt;&lt;/n:math&gt; oxides, positions &lt;q:math xmlns:q=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;q:mrow&gt;&lt;q:mi&gt;M&lt;/q:mi&gt;&lt;q:mi&gt;Ni&lt;/q:mi&gt;&lt;q:msub&gt;&lt;q:mi mathvariant=\"normal\"&gt;H&lt;/q:mi&gt;&lt;q:mn&gt;2&lt;/q:mn&gt;&lt;/q:msub&gt;&lt;/q:mrow&gt;&lt;/q:math&gt; as compelling materials for unconventional high-&lt;s:math xmlns:s=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;s:msub&gt;&lt;s:mi&gt;T&lt;/s:mi&gt;&lt;s:mi mathvariant=\"normal\"&gt;c&lt;/s:mi&gt;&lt;/s:msub&gt;&lt;/s:math&gt; superconductivity under standard conditions. &lt;jats:supplementary-material&gt; &lt;jats:copyright-statemen","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":"9 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143857733","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":"Nonreciprocal spin-wave dispersion in magnetic bilayers","authors":"Christopher Heins, Vadym Iurchuk, Olga Gladii, Lukas Körber, Attila Kákay, Jürgen Fassbender, Katrin Schultheiss, Helmut Schultheiss","doi":"10.1103/physrevb.111.134434","DOIUrl":"https://doi.org/10.1103/physrevb.111.134434","url":null,"abstract":"Nonreciprocal spin-wave propagation in bilayer ferromagnetic systems has attracted significant attention due to its potential to precisely quantify material parameters as well as for applications in magnonic logic and information processing. In this paper, we investigate the nonreciprocity of spin-wave dispersions in heterostructures consisting of two distinct ferromagnetic materials, focusing on the influence of saturation magnetization and thickness of the magnetic layers. We exploit Brillouin light scattering to confirm numerical calculations which are conducted with the finite element software . An extensive numerical analysis reveals that the nonreciprocal behavior is strongly influenced by the changing material parameters, with asymmetry in the spin-wave propagation direction reaching several GHz under optimized conditions. Our findings demonstrate that tailoring the bilayer composition enables precise control over nonreciprocity, providing a pathway for engineering efficient unidirectional spin-wave devices. These results offer a deeper understanding of hybrid ferromagnetic systems and open avenues for designing advanced magnonic circuits. <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":"6 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143853166","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":"Elastic properties of the W0.75Re0.25 alloy at high pressure up to 183 GPa","authors":"O. S. Pardo, P. Söderlind, R. E. Lim, C. C. Zurkowski, J. S. Smith, Zs. Jenei, E. F. O’Bannon","doi":"10.1103/physrevb.111.134110","DOIUrl":"https://doi.org/10.1103/physrevb.111.134110","url":null,"abstract":"The high pressure equation of state for the W</a:mi>0.75</a:mn></a:mrow></a:msub>R</a:mi>e</a:mi>0.25</a:mn></a:mrow></a:msub></a:mrow></a:math> alloy is experimentally determined up to 183 GPa with synchrotron angle-dispersive powder x-ray diffraction in the diamond-anvil cell and to ∼925 GPa with density-functional theory. W-Re alloys are used in many industrial high-temperature applications and as a confining gasket material in high-pressure diamond-anvil cell research. The inclusion of 25 wt. % Re achieves the highest performance in terms of strength and ductility while also maintaining the body-centered-cubic (bcc) crystal structure, yet to date there has been no investigation into its elastic behavior at high pressure. We present the experimentally and theoretically determined volumetric and elastic pressure response and systematically compare these results to other W-Re alloys, finding that the bulk modulus of W-Re alloys varies nonlinearly with Re content and <e:math xmlns:e=\"http://www.w3.org/1998/Math/MathML\"><e:mrow><e:msub><e:mi mathvariant=\"normal\">W</e:mi><e:mrow><e:mn>0.75</e:mn></e:mrow></e:msub><e:msub><e:mi>Re</e:mi><e:mrow><e:mn>0.25</e:mn></e:mrow></e:msub></e:mrow></e:math> becomes less incompressible than W at 85 GPa. <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":"46 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143853165","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":"Eliminating the confined dark-exciton qubit precession using an externally applied magnetic field","authors":"Zu-En Su, Dan Cogan, Ido Schwartz, Ayal Beck, David Gershoni","doi":"10.1103/physrevb.111.l161302","DOIUrl":"https://doi.org/10.1103/physrevb.111.l161302","url":null,"abstract":"We investigate experimentally and theoretically the behavior of the confined dark exciton in an InAs/GaAs semiconductor quantum dot, under the application of an external magnetic field in a Voigt configuration. We show that by varying the magnitude and direction of the external field one can accurately control the dark-exciton fine-structure splitting. In addition, we show that the dark-exciton spin state is approximately polarized along the cubic crystallographic directions [100] or equivalents. By comparing our experimental results with a model for the exchange and Zeeman interactions, we find the conditions for nullifying the fine-structure splitting between the two eigenstates of the dark exciton, thereby stopping its qubit precession. <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":"10 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143853162","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":"Ultrafast electron-phonon scattering in an antiferromagnetic Dirac semimetal","authors":"Marius Weber, Kai Leckron, Libor Šmejkal, Jairo Sinova, Baerbel Rethfeld, Hans Christian Schneider","doi":"10.1103/physrevb.111.144421","DOIUrl":"https://doi.org/10.1103/physrevb.111.144421","url":null,"abstract":"Topological antiferromagnetic systems, which exhibit anisotropic band structures combined with complex relativistic spin structures in momentum space, have shown strong magnetoresistance effects driven by Dirac fermion characteristics. While these new antiferromagnets have been studied in transport experiments, very little is known about their spin-dependent electronic dynamics on ultrafast timescales and far-from-equilibrium behavior. This paper investigates theoretically the spin-dependent electronic dynamics due to electron-phonon scattering in a model electronic band structure that corresponds to a Dirac semimetal antiferromagnet. Following a spin-conserving instantaneous excitation we obtain a change of the antiferromagnetic spin polarization due to the scattering dynamics for the site-resolved spin expectation values. This allows us to identify fingerprints of the anisotropic band structure in the carrier dynamics on ultrashort timescales. <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":"68 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143857734","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":"Low-frequency acoustic surface waves on a coupled membrane-cavity metasurface","authors":"D. B. Moore, J. D. Smith, J. R. Sambles, A. P. Hibbins, T. A. Starkey","doi":"10.1103/physrevb.111.155427","DOIUrl":"https://doi.org/10.1103/physrevb.111.155427","url":null,"abstract":"We experimentally study the dispersion of localized acoustic surface waves (ASWs) supported by an array of coupled membrane-capped cavities. We design, simulate, and characterize a metasurface with a unit cell comprising a simple cylindrical air-filled cavity resonator topped with a tensioned membrane. We show that by tuning the resonance of constituent membrane or cavity, the behavior of the coupled system can reduce the frequency of the lowest supported surface mode by half compared to cavities without membranes. Experimentally obtained dispersion of the ASWs supported by the sample are compared with numerical predictions. With this mechanism, the operating frequency of acoustic surface modes can readily be altered by changing the physical parameters of constituent elements to tune the resonant frequency of the coupled cavity-membrane 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":"7 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143857728","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":"Role of antisymmetric orbitals and electron-electron interactions on the two-particle spin and valley blockade in graphene double quantum dots","authors":"S. Möller, L. Banszerus, K. Hecker, H. Dulisch, K. Watanabe, T. Taniguchi, C. Volk, C. Stampfer","doi":"10.1103/physrevb.111.165416","DOIUrl":"https://doi.org/10.1103/physrevb.111.165416","url":null,"abstract":"We report on an experimental study of spin and valley blockade in two-electron bilayer graphene (BLG) double quantum dots (DQDs) and explore the limits set by asymmetric orbitals and electron-electron interactions. The results obtained from magnetotransport measurements on two-electron BLG DQDs, where the resonant tunneling transport involves both orbital symmetric and antisymmetric two-particle states, show a rich level spectrum. We observe a magnetic field tunable spin and valley blockade, which is limited by the orbital splitting, the strength of the electron-electron interaction and the difference in the valley g</a:mi></a:mrow></a:math>-factors between the symmetric and antisymmetric two-particle orbital states. Our conclusions are supported by simulations based on rate equations, which allow the identification of prominent interdot transitions associated with the transition from single- to two-particle states observed in the experiment. <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":"24 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143849512","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}