Spin Seebeck effect and thermal spin galvanic effect in Ni80Fe20/p-Si bilayers

  title={Spin Seebeck effect and thermal spin galvanic effect in Ni80Fe20/p-Si bilayers},
  author={Ravi Bhardwaj and Paul C. Lou and Sandeep Kumar},
  journal={arXiv: Mesoscale and Nanoscale Physics},
The development of spintronics and spin-caloritronics devices need efficient generation, detection and manipulation of spin current. The thermal spin current from spin-Seebeck effect has been reported to be more energy efficient than the electrical spin injection methods. But, spin detection has been the one of the bottlenecks since metals with large spin-orbit coupling is an essential requirement. In this work, we report an efficient thermal generation and interfacial detection of spin current… Expand
Generation and detection of dissipationless spin current in a MgO/Si bilayer.
  • P. Lou, Sandeep Kumar
  • Physics, Materials Science
  • Journal of physics. Condensed matter : an Institute of Physics journal
  • 2018
This study experimentally demonstrates the generation of helical dissipationless spin current using the spin-Hall effect and reports the efficient detection of spin current at the MgO/Si thin film interface due to Rashba spin-orbit coupling. Expand
Giant Enhancement in Rashba Spin-Seebeck Effect in NiFe/p-Si Thin Films
The spin-Seebeck effect mediated thermoelectric energy conversion can provide efficient alternative to traditional thermoelectrics for waste heat recovery. To achieve this goal, efficient spin toExpand
Spin phonon interactions and magneto-thermal transport behavior in p-Si
Abstract The spin-phonon interaction is the dominant process for spin relaxation in Si, and as thermal transport in Si is dominated by phonons, one would expect spin polarization to influence Si'sExpand
Experimental evidence of hidden spin polarization in silicon by using strain gradient
The centrosymmetric materials with hidden spin polarization are considered to be the promising candidates for realization of energy efficient spintronics systems and devices. However, the control ofExpand
Magneto-Seebeck effect in Co2FeAl/MgO/Co2FeAl: first-principles calculations.
The results indicate that the sign of tunneling magneto-Seebeck (TMS) value with Co2/O termination is consistent with that of the measured experimental result although its value at room temperature is smaller than the experimental one. Expand
Alloying-induced spin Seebeck effect and spin figure of merit in Pt-based bimetallic atomic wires of noble metals.
It is found that alloying and/or topological tailoring bring in quantitative as well as qualitative changes in the transport properties of Pt-based bimetallic wires of noble metals modelled in linear, ladder, and double zigzag topologies. Expand
Distinguishing the inverse spin Hall effect photocurrent of electrons and holes by comparing to the classical Hall effect.
It is found that the contribution of the inverse spin Hall effect of electrons and holes in an InGaAs/AlGaAs un-doped multiple quantum well is approximately equal at room temperature. Expand
Local electric field induced spin photocurrent in ReS2
Circular polarized photocurrent is observed near the electrodes on a few-layer ReS2sample at room temperature. For both electrodes, the spatial distribution of the circular polarized photocurrentExpand
Ab initio studies of structural, electronic and magnetic properties of Al1-xMnxN in zinc blende structure
Abstract First-principles method has been applied to calculate the structural, electronic and magnetic properties of the Al1-xMnxN alloys (with x = 0.0, 0.125, 0.25, 0.375, 0.50, 0.625, 0.75, 0.875Expand
Localized magnetic state in the Rashba model
Abstract We study the formation of local moments in a metallic host due to a localized spin-orbit (Rashba) interaction. Using the Anderson model we describe the occurrence of magnetic moments throughExpand


Spin mediated magneto-electro-thermal transport behavior in Ni80Fe20/MgO/p-Si thin films
In Si, the spin-phonon interaction is the primary spin relaxation mechanism. At low temperatures, the absence of spin-phonon relaxation will lead to enhanced spin accumulation. Spin accumulation mayExpand
Spin-Hall effect and emergent antiferromagnetic phase transition in n-Si
Abstract Spin current experiences minimal dephasing and scattering in Si due to small spin-orbit coupling and spin-lattice interactions is the primary source of spin relaxation. We hypothesize thatExpand
Observation of the spin-Seebeck effect in a ferromagnetic semiconductor.
The spin-Seebeck effect is observed in a ferromagnetic semiconductor, GaMnAs, which allows flexible design of the magnetization directions, a larger spin polarization, and measurements across the magnetic phase transition, even in the absence of longitudinal charge transport. Expand
Longitudinal spin Seebeck effect: from fundamentals to applications.
Basic experiments on the LSSE in insulators provide a novel and versatile pathway to thermoelectric generation in combination of the inverse spin-Hall effects. Expand
Giant spin Seebeck effect in a non-magnetic material
It is proposed that the giant spin Seebeck effect is mediated by phonon–electron drag, which changes the electrons’ momentum and directly modifies the spin-splitting energy through spin–orbit interactions. Expand
Robust spin-orbit torque and spin-galvanic effect at the Fe/GaAs (001) interface at room temperature
It is found that the magnitude of the interfacial SOT, caused by the reduced symmetry at the interface, is comparably strong as in ferromagnetic metal/non-magnetic metal systems, and suggests that single crystalline Fe/GaAs interfaces may enable efficient electrical magnetization manipulation. Expand
Spin mediated enhanced negative magnetoresistance in Ni80Fe20 and p-silicon bilayer
Abstract In this work, we present an experimental study of spin mediated enhanced negative magnetoresistance in Ni 80 Fe 20 (50 nm)/p-Si (350 nm) bilayer. The resistance measurement shows a reductionExpand
Spin-dependent Seebeck coefficients of Ni80Fe20 and Co in nanopillar spin valves
The spin-dependent Seebeck coefficient is experimentally determined using nanopillar spin valve devices, a stack of two ferromagnetic layers separated by a nonmagnetic layer, in agreement with earlier theoretical work in Co/Cu multilayers and spin- dependent Seebeck andspin-dependent Peltier measurements. Expand
Complementary spin-Hall and inverse spin-galvanic effect torques in a ferromagnet/semiconductor bilayer.
A vector analysis of the torques in a prepared epitaxial transition-metal ferromagnet/semiconductor-paramagnet single-crystal structure by means of the all-electrical ferromagnetic resonance technique is shown. Expand
Thermal spin pumping and magnon-phonon-mediated spin-Seebeck effect
The phonon-mediated non-equilibrium that drives the thermal spin pumping is confirmed also by temperature-dependent measurements, giving rise to a giant enhancement of the SSE signals at low temperatures. Expand