803 citations · 2.6k across the 37 of their papers we have counts for
14 papers · 1 filter
Transition from Diffusive to Superdiffusive Transport in Carbon Nanotube Networks via Nematic Order Control
Michael Wais, Filchito Renee G. Bagsican, Natsumi Komatsu +8
The one-dimensional confinement of quasiparticles in individual carbon nanotubes (CNTs) leads to extremely anisotropic electronic and optical properties. In a macroscopic ensemble…
Modelling of Spintronic Terahertz Emitters as a function of spin generation and diffusion geometry
Yingshu Yang, Stefano Dal Forno, Marco Battiato
Spintronic THz emitters (STE) are efficient THz sources constructed using thin heavy-metal (HM) and ferromagnetic-metal (FM) layers. To improve the performance of the STE, differen…
Secondary spin current driven efficient THz spintronic emitters
Piyush Agarwal, Yingshu Yang, Rohit Medwal +4
Femtosecond laser-induced photoexcitation of ferromagnet (FM)/heavy metal (HM) heterostructures have attracted attention by emitting broadband terahertz frequencies. The phenomenon…
Terahertz Excitonics in Carbon Nanotubes: Exciton Autoionization and Multiplication
Filchito Renee G. Bagsican, Michael Wais, Natsumi Komatsu +10
Excitons play major roles in optical processes in modern semiconductors, such as single-wall carbon nanotubes (SWCNTs), transition metal dichalcogenides, and 2D perovskite quantum…
Analysis of the linear relationship between asymmetry and magnetic moment at the M-edge of 3d transition metals
Somnath Jana, R. S. Malik, Yaroslav O. Kvashnin +11
The magneto-optical response of Fe and Ni during ultrafast demagnetization is studied experimentally and theoretically. We have performed pump-probe experiments in the transverse m…
Ultrafast Spin-To-Charge Conversion at the Surface of Topological Insulator Thin Films
Xinbo Wang, Liang Cheng, Dapeng Zhu +11
Strong spin-orbit coupling, resulting in the formation of spin-momentum-locked surface states, endows topological insulators with superior spin-to-charge conversion characteristics…
Spin polarisation of ultrashort spin current pulses injected in semiconductors
Marco Battiato
Ultrashort spin current pulses have a great potential of becoming the carriers of information in future ultrafast spintronics. They present the outstanding property of an extremely…
Importance of Schottky barriers for wide-bandgap thermoelectric devices
Michael Wais, Marco Battiato, Karsten Held
The development of thermoelectric devices faces not only the challenge of optimizing the Seebeck coefficient, the electrical and thermal conductivity of the active material, but al…
Boltzmann approach to high-order transport: the non-linear and non-local responses
M. Battiato, V. Zlatic, K. Held
The phenomenological textbook equations for the charge and heat transport are extensively used in a number of fields ranging from semiconductor devices to thermoelectricity. We pro…
Ultrafast and gigantic spin injection in semiconductors
M. Battiato, K. Held
The injection of spin currents in semiconductors is one of the big challenges of spintronics. Motivated by the ultrafast demagnetisation and spin injection into metals, we propose…
Unified picture for the colossal thermopower compound FeSb
M. Battiato, J. M. Tomczak, Z. Zhong +1
We identify the driving mechanism of the gigantic Seebeck coefficient in FeSb as the phonon-drag effect associated with an in-gap density of states that we demonstrate to deriv…
Momentum resolved spin dynamics of bulk and surface excited states in the topological insulator
C. Cacho, A. Crepaldi, M. Battiato +16
The prospective of optically inducing a spin polarized current for spintronic devices has generated a vast interest in the out-of-equilibrium electronic and spin structure of topol…
Microscopic electronic configurations after ultrafast magnetization dynamics
I. L. M. Locht, I. Di Marco, S. Garnerone +2
We provide a model for the prediction of the electronic and magnetic configurations of ferromagnetic Fe after an ultrafast decrease or increase of magnetization. The model is based…
Super-Diffusive Spin-Transport as a Mechanism of Ultrafast Demagnetization
Marco Battiato, Karel Carva, Peter M. Oppeneer
We propose a semi-classical model for femtosecond-laser induced demagnetization due to spin-polarized excited electron diffusion in the super-diffusive regime. Our approach treats…