Other Condensed Matter

New submissions

• New submissions
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New submissions for Tue, 30 Apr 24

[1]  arXiv:2404.17887 [pdf, other]

Title: Spin-dependent $π$$π^{\ast}$ gap in graphene on a magnetic substrate

Authors: P. M. Sheverdyaeva, G. Bihlmayer, E. Cappelluti, D. Pacilé, F. Mazzola, N. Atodiresei, M. Jugovac, I. Grimaldi, G. Contini, A. K. Kundu, I. Vobornik, J. Fujii, P. Moras, C. Carbone, L. Ferrari

Comments: 6 pages, 4 figures

Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Other Condensed Matter (cond-mat.other)

We present a detailed analysis of the electronic properties of graphene/Eu/Ni(111). By using angle and spin-resolved photoemission spectroscopy and ab initio calculations, we show that the Eu-intercalation of graphene/Ni(111) restores the nearly freestanding dispersion of the $\pi\pi^\ast$ Dirac cones at the K point with an additional lifting of the spin degeneracy due to the mixing of graphene and Eu states. The interaction with the magnetic substrate results in a large spin-dependent gap in the Dirac cones with a topological nature characterized by a large Berry curvature, and a spin-polarized van Hove singularity, whose closeness to the Fermi level gives rise to a polaronic band.

[2]  arXiv:2404.18274 [pdf, ps, other]

Title: A Universal Kinematical Group for Quantum Mechanics

Authors: Gerald A. Goldin, David H. Sharp

Comments: This report is based on the presentation by G. A. Goldin at the International Conference on Mathematical Methods in Physics 2023, in Marrakesh, Morocco

Subjects: Quantum Physics (quant-ph); Other Condensed Matter (cond-mat.other); Mathematical Physics (math-ph)

In 1968, Dashen and Sharp obtained a certain singular Lie algebra of local densities and currents from canonical commutation relations in nonrelativistic quantum field theory. The corresponding Lie group is infinite dimensional: the natural semidirect product of an additive group of scalar functions with a group of diffeomorphisms. Unitary representations of this group describe a wide variety of quantum systems, and have predicted previously unsuspected possibilities; notably, anyons and nonabelian anyons in two space dimensions. We present here foundational reasons why this semidirect product group serves as a universal kinematical group for quantum mechanics. We obtain thus a unified account of all possible quantum kinematics for systems with mass in an arbitrary physical space, and clarify the role played by topology in quantum mechanics. Our development does not require quantization of classical phase space; rather, the classical limit follows from the quantum mechanics. We also consider the relationship of our development to Heisenberg quantization.

[3]  arXiv:2404.18712 [pdf, ps, other]

Title: Anomalous Spin and Orbital Hall Phenomena in Antiferromagnetic Systems

Authors: J. E. Abrão, E. Santos, J. L. Costa, J. G. S. Santos, J. B. S. Mendes, A. Azevedo

Comments: 5 pages and 4 figures

Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Materials Science (cond-mat.mtrl-sci); Other Condensed Matter (cond-mat.other)

We investigate anomalous spin and orbital Hall phenomena in antiferromagnetic (AF) materials via orbital pumping experiments. Conducting spin and orbital pumping experiments on YIG/Pt/Ir20Mn80 heterostructures, we unexpectedly observe strong spin and orbital anomalous signals in an out-of-plane configuration. We report a sevenfold increase in the signal of the anomalous inverse orbital Hall effect (AIOHE) compared to conventional effects. Our study suggests expanding the Orbital Hall angle ({\theta}_OH) to a rank 3 tensor, akin to the Spin Hall angle ({\theta}_SH), to explain AIOHE. This work pioneers converting spin-orbital currents into charge current, advancing the spin-orbitronics domain in AF materials.

Replacements for Tue, 30 Apr 24

[4]  arXiv:2309.03345 (replaced) [pdf, other]

Title: Comment on "Two-component density functional theory study of quantized muons in solids"

Authors: Mohammad Goli, Nahid Sadat Riyahi, Shant Shahbazian

Comments: Main text plus supplemental material

Subjects: Other Condensed Matter (cond-mat.other); Atomic and Molecular Clusters (physics.atm-clus)

[5]  arXiv:2401.12505 (replaced) [pdf, other]

Title: Topological magnons in a non-coplanar magnetic order on the triangular lattice

Authors: Linli Bai, Ken Chen

Subjects: Strongly Correlated Electrons (cond-mat.str-el); Materials Science (cond-mat.mtrl-sci); Other Condensed Matter (cond-mat.other)

[6]  arXiv:2401.15009 (replaced) [pdf, other]

Title: Double pulse all-optical coherent control of ultrafast spin-reorientation in antiferromagnetic rare-earth orthoferrite

Authors: N. E. Khokhlov, A. E. Dolgikh, B. A. Ivanov, A. V. Kimel

Comments: 5 pages, 6 figures

Subjects: Strongly Correlated Electrons (cond-mat.str-el); Other Condensed Matter (cond-mat.other)

[7]  arXiv:2403.11566 (replaced) [pdf, ps, other]

Title: The effect of Coulomb assisted hopping on STM signal: extended two site Hubbard model analysis

Authors: Garry Goldstein

Comments: Comments welcome. V2: Minor corrections

Subjects: Strongly Correlated Electrons (cond-mat.str-el); Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Other Condensed Matter (cond-mat.other)

[8]  arXiv:2404.13597 (replaced) [pdf, other]

Title: Fully Tunable Fano Resonances in Chiral Electronic Transport

Authors: Ai-Ying Ye, Zhao Yang Zeng

Comments: 6 pages, 4 ifgures, with supplementary material

Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Other Condensed Matter (cond-mat.other)

[9]  arXiv:2404.14306 (replaced) [pdf, ps, other]

Title: Twisted nonlinear optics in monolayer van der Waals crystals

Authors: Tenzin Norden, Luis M. Martinez, Nehan Tarefder, Kevin W. C. Kwock, Luke M. McClintock, Nicholas Olsen, Luke N. Holtzman, Xiaoyang Zhu, James C. Hone, Jinkyoung Yoo, Jian-Xin Zhu, P. James Schuck, Antoinette J. Taylor, Rohit P. Prasankumar, Wilton J. M. Kort-Kamp, Prashant Padmanabhan

Subjects: Optics (physics.optics); Other Condensed Matter (cond-mat.other)

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