Skyrmionic Spin Seebeck Effect

Skyrmionic Spin Seebeck Effect via Dissipative Thermomagnonic Torques

We derive thermomagnonic torque and its ``β -type'' dissipative correction from the stochastic Landau-Lifshitz-Gilbert equation. We show that this torque is important for describing temperature gradient induced motion of skyrmions in helical magnets while ``β -type'' correction plays an essential role in generating transverse Magnus force. We propose to detect such skyrmionic motion by employing the transverse spin Seebeck effect geometry.

a) The magnon current induced by temperature gradient exerts spin torque on magnetization which leads to skyrmion motion in the direction of the hot region with an additional Hall-like side motion. An additional non-magnetic layer, such as Pt, can be used in order to detect the spin pumping resulting from skyrmionic motion, i.e. via the inverse spin Hall effect. b) Spin Seebeck effect geometry can be used for detection of the Hall-like motion of skyrmions. Due to mostly out-of-plane magnetization configuration the ordinary spin Seebeck effect should be suppressed.

http://jobs.physicstoday.org/jobs/5979725/postdoctoral-research-and-graduate-level-studies-at-university-of-nebraska-loncoln

http://jobs.physicstoday.org/jobs/5979725/postdoctoral-research-and-graduate-level-studies-at-university-of-nebraska-loncoln

Non-Abelian statistics and topological quantum information processing in 1D wire networks

http://www.nature.com/nphys/journal/v7/n5/abs/nphys1915.html

Spin caloritronics

http://www.nature.com/doifinder/10.1038/nmat3301 

Spintronics is about the coupled electron spin and charge transport in condensed-matter structures and devices. The recently invigorated field of spin caloritronics focuses on the interaction of spins with heat currents, motivated by newly discovered physical effects and strategies to improve existing thermoelectric devices. Here we give an overview of our understanding and the experimental state-of-the-art concerning the coupling of spin, charge and heat currents in magnetic thin films and nanostructures. Known phenomena are classified either as independent electron (such as spin-dependent Seebeck) effects in metals that can be understood by a model of two parallel spin-transport channels with different thermoelectric properties, or as collective (such as spin Seebeck) effects, caused by spin waves, that also exist in insulating ferromagnets. The search to find applications — for example heat sensors and waste heat recyclers — is on.

Thermomagnonic spin transfer and Peltier effects in insulating magnets - Abstract - EPL (Europhysics Letters) - IOPscience

Thermomagnonic spin transfer and Peltier effects in insulating magnets - Abstract - EPL (Europhysics Letters) - IOPscience

Local stabilizer codes in three dimensions without string logical operators

Phys. Rev. A 83, 042330 (2011)

Coherent quantum state storage and transfer between two phase qubits via a resonant cavity

Nature 449, 438-442 (27 September 2007) | doi:10.1038/nature06124; Received 18 April 2007; Accepted 25 July 2007

Mika A. Sillanpää, Jae I. Park & Raymond W. Simmonds