Efficient matrix product state methods for extracting spectral information on rings and cylinders

Author(s): Maarten Van Damme, Robijn Vanhove, Jutho Haegeman, Frank Verstraete, and Laurens VanderstraetenBased on the matrix product state (MPS) formalism, we introduce an ansatz for capturing excited states in finite systems with open boundary conditions, providing a very efficient method for computing, e.g., the spectral gap of quantum spin chains....

18h

Excitonic effects on electron spin orientation and relaxation in wurtzite GaN

Author(s): Shixiong Zhang, Ning Tang, Xiaoyue Zhang, Xingchen Liu, Hongming Guan, Yunfan Zhang, Xuan Qian, Yang Ji, Weikun Ge, and Bo ShenExcitonic effects on electron spin orientation and relaxation in wurtzite GaN are investigated with photon-energy-dependent time-resolved Kerr rotation spectroscopy at low temperatures. It is observed that the spin...

19h

Theory of nonlinear response for charge and spin currents

Author(s): Zhi-Fan Zhang, Zhen-Gang Zhu, and Gang SuThe nonlinear Hall effect, which is the second-order harmonic charge Hall effect from the Berry curvature dipole in momentum space, has received much attention recently. As the responses to higher harmonics of the driving ac electric field are prominent and measurable, we develop a general nonlinear...[Phys....

19h

Skyrmion elongation, duplication, and rotation by spin-transfer torque under spatially varying spin current

Author(s): Floris van Duijn, Javier Osca, and Bart SoréeThe effect of the spatially varying spin current on a skyrmion is numerically investigated. It is shown that an inhomogeneous current density induces an elongation of the skyrmion. This elongation can be controlled using current pulses of different strength and duration. Long current pulses lead...

19h

Persistent current noise in narrow Josephson junctions

Author(s): Dushko Kuzmanovski, Rubén Seoane Souto, and Alexander V. BalatskyJosephson junctions have broad applications in metrology, quantum information processing, and remote sensing. For these applications, the electronic noise is a limiting factor. In this work we study the thermal noise in narrow Josephson junctions using a tight-binding Hamiltonian....

19h

Unidirectional emission and reconfigurability of channeled spin waves from a vortex core in a teardrop-shaped nanopatch

Author(s): D. Osuna Ruiz, E. L. Martin, A. P. Hibbins, and F. Y. OgrinWe propose the design of a teardrop-shaped magnetic patch as a unidirectional magnetically driven spin wave emitter capable of operating in a wide range of frequencies. We explore its potential through micromagnetic studies in line with vibrational sample magnetometry measurements...

19h

Classical linear magnetoresistance in exfoliated ${\mathrm{NbTe}}_{2}$ nanoflakes

Author(s): Siyao Gu, Kaixuan Fan, Yang Yang, Hong Wang, Yongkai Li, Fanming Qu, Guangtong Liu, Zi-an Li, Zhiwei Wang, Yugui Yao, Jianqi Li, Li Lu, and Fan YangRecently, the transition metal dichalcogenide NbTe2 was predicted to be a candidate material of topological semimetal. Here we report the magnetotransport data measured in two devices fabricated...

19h

Odd-frequency pairing inherent in a Bogoliubov Fermi liquid

Author(s): Tatsuya Miki, Shun-Ta Tamura, Shoma Iimura, and Shintaro HoshinoThe disorder and interaction effects on Bogoliubov-Fermi surfaces with preserved inversion symmetry are studied for a low-energy effective model coupled to bosonic degrees of freedom. It is shown that the nonideal Bogoliubov quasiparticles (bogolons) generically induce the odd-frequency...

19h

Statistical analysis of spin switching in coupled spin-crossover molecules

Author(s): Philipp Stegmann, Alex Gee, Neil T. Kemp, and Jürgen KönigWe study the switching behavior of two spin-crossover molecules residing in a nanojunction device consisting of two closely spaced gold electrodes. The spin states are monitored through a real-time measurement of the resistance of the junction. A statistical analysis of the resistance...

19h

Microwave response of superconductors that obey local electrodynamics

Author(s): František Herman and Richard HlubinaSurface impedance of type-II superconductors is determined by their local optical conductivity σ(ω). Standard BCS-like theoretical descriptions of σ(ω), due to Mattis and Bardeen [Phys. Rev. 111, 412 (1958)] or Zimmermann et al. [Physica C 183, 99 (1991)], do not take pair-breaking processes into ac...[Phys....

19h