Anomalous Auger Recombination in PbSe

Author(s): Xie Zhang, Jimmy-Xuan Shen, and Chris G. Van de WalleUsing first-principles approaches we find that the Auger recombination in PbSe is anomalous in three distinct ways. First, the direct Auger coefficient is 4 orders of magnitude lower than that of other semiconductors with similar band gaps, a result that can be attributed to the lack of...

27m

Non-Abelian Braiding of Dirac Fermionic Modes Using Topological Corner States in Higher-Order Topological Insulator

Author(s): Yijia Wu, Hua Jiang, Jie Liu, Haiwen Liu, and X. C. XieWe numerically demonstrate that the topological corner states residing in the corners of higher-order topological insulator possess non-Abelian braiding properties. Such topological corner states are Dirac fermionic modes other than Majorana zero modes. We claim that Dirac fermionic modes...

27m

Robust $A$-Type Order and Spin-Flop Transition on the Surface of the Antiferromagnetic Topological Insulator ${\mathrm{MnBi}}_{2}{\mathrm{Te}}_{4}$

Author(s): Paul M. Sass, Jinwoong Kim, David Vanderbilt, Jiaqiang Yan, and Weida WuHere, we present microscopic evidence of the persistence of uniaxial A-type antiferromagnetic order to the surface layers of MnBi2Te4 single crystals using magnetic force microscopy. Our results reveal termination-dependent magnetic contrast across both surface step edges...

27m

Jamming Below Upper Critical Dimension

Author(s): Harukuni IkedaExtensive numerical simulations in the past decades proved that the critical exponents of the jamming of frictionless spherical particles are the same in two and three dimensions. This implies that the upper critical dimension is du=2 or lower. In this Letter, we study the jamming transition below t...[Phys. Rev. Lett. 125,...

27m

Bound Hole States Associated to Individual Vanadium Atoms Incorporated into Monolayer ${\mathrm{WSe}}_{2}$

Author(s): Pierre Mallet, Florian Chiapello, Hanako Okuno, Hervé Boukari, Matthieu Jamet, and Jean-Yves VeuillenDoping a two-dimensional semiconductor with magnetic atoms is a possible route to induce magnetism in the material. We report on the atomic structure and electronic properties of monolayer WSe2 intentionally doped with vanadium atoms by means...

59m

Nuclear Excitation of the $^{229}\mathrm{Th}$ Isomer via Defect States in Doped Crystals

Author(s): Brenden S. Nickerson, Martin Pimon, Pavlo V. Bilous, Johannes Gugler, Kjeld Beeks, Tomas Sikorsky, Peter Mohn, Thorsten Schumm, and Adriana PálffyWhen Th nuclei are doped in CaF2 crystals, a set of electronic defect states appear in the crystal band gap which would otherwise provide complete transparency to vacuum-ultraviolet radiation. The...

59m

Orientation Dynamics of Sedimenting Anisotropic Particles in Turbulence

Author(s): Prateek Anand, Samriddhi Sankar Ray, and Ganesh SubramanianWe examine the dynamics of small anisotropic particles (spheroids) sedimenting through homogeneous isotropic turbulence using direct numerical simulations and theory. The gravity-induced inertial torque acting on sub-Kolmogorov spheroids leads to pronouncedly non-Gaussian orientation...

59m

Mode Hopping in Oscillating Systems with Stochastic Delays

Author(s): Vladimir Klinshov, Dmitry Shchapin, and Otti D’HuysWe study a noisy oscillator with pulse delayed feedback, theoretically and in an electronic experimental implementation. Without noise, this system has multiple stable periodic regimes. We consider two types of noise: (i) phase noise acting on the oscillator state variable and (ii) stochastic...

59m

Helical Edge States and Quantum Phase Transitions in Tetralayer Graphene

Author(s): Shi Che, Yanmeng Shi, Jiawei Yang, Haidong Tian, Ruoyu Chen, Takashi Taniguchi, Kenji Watanabe, Dmitry Smirnov, Chun Ning Lau, Efrat Shimshoni, Ganpathy Murthy, and Herbert A. FertigTetralayer graphene tuned via a gate voltage displays a striking phase diagram consisting of one insulating and two metallic phases.[Phys. Rev. Lett. 125, 036803]...

59m

Defect-Selective Charge-Density-Wave Condensation in $2H\text{−}{\mathrm{NbSe}}_{2}$

Author(s): Eunseok Oh, Gyeongcheol Gye, and Han Woong YeomDefects have been known to substantially affect quantum states of materials including charge density wave (CDW). However, the microscopic mechanism of the influence of defects is often elusive due partly to the lack of atomic scale characterization of defects themselves. We investigate native...

59m