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Quantum Spin and Orbital Physics Lab
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The lab pursues quantum spintronics, exploring the coupling dynamics of spin and orbital degrees of freedom.
AboutAbout the lab
Exploring the coupling of spin, orbitals, magnons, and phonons
The Otani Lab (Quantum Spin and Orbital Physics Group) studies how charge, spin, orbital angular momentum, magnons, and phonons couple and convert into one another in solids.
The lab aims to establish “quantum spintronics,” a research framework that deals with these.
Its research rests on three pillars: orbitronics, surface acoustic waves and magnetoacoustics in resonators, and hybrid quasiparticles in artificial magnetic and phononic crystals.
The lab’s website also introduces it as the Otani Lab in the Division of Nanoscale Science, Institute for Solid State Physics, The University of Tokyo.
Key terms
- Orbital angular momentum
- The amount of rotation in an electron’s orbital motion. It is distinct from spin, which corresponds to the electron’s own rotation
- Magnon
- The name given to the wave in which a disturbance in spin direction propagates through a magnet, treated as a particle
- Phonon
- The name given to the wave produced by atomic vibrations propagating through a crystal, treated as a particle
- Surface acoustic wave
- A sound wave that travels along the surface of a solid
ResearchResearch themes
The lab aims to establish “quantum spintronics,” which explores the coupling dynamics and interconversion of charge, spin, orbital angular momentum, magnons, and phonons in solids. Its research centers on three interrelated pillars.
*Illustrative imageOrbitronics
This research addresses the generation, transport, manipulation, and detection of orbital angular momentum. It is the first of the lab’s three pillars.
*Illustrative imageSurface Acoustic Waves and Magnetoacoustics in Resonators
The lab works on surface-acoustic-wave-driven quantum transport and magnetoacoustics in resonators. This includes strong magnon–phonon coupling at room temperature.
*Illustrative imageHybrid Quasiparticle Research
The lab studies “hybrid quasiparticles” in artificially designed magnetic and phononic crystals. It is the last of the lab’s three pillars.
MembersFaculty
The Otani Lab’s members consist of faculty, technical assistants, and secretaries.
- ProfessorYoshichika Otani
- Assistant ProfessorMingran Xu
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “JEOL Electron Beam Lithography (EBL) ( )” Simon Fraser University - Communications & Marketing / CC BY 2.0 (cropped)
- Orbitronics: “Atomic orbitals spdf m-eigenstates” Geek3 / CC BY-SA 4.0 (cropped)
- Surface Acoustic Waves and Magnetoacoustics in Resonators: “F1319M” Mister rf / CC BY-SA 4.0 (cropped)
- Hybrid Quasiparticle Research: “A Diagram of Phononic Crystal Structure” User:h2g2bob / CC BY 1.0 (cropped)
- Related lab (スピン構造物性): “J-PARC Materials and Life Science Experimental Facility Experimental Hall No. 1” Kestrel / CC BY-SA 4.0 (cropped)
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- Related lab (分子物性物理): “Stable Levitation of a magnet on a superconductor” Julien Bobroff (user:Jubobroff), Frederic Bouquet (user:Fbouquet), LPS, Orsay, France / CC BY-SA 3.0 (cropped)
- Related lab (強磁場物性物理学): “Vibrator ignition coil” 作者不詳 / Public domain (cropped)
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