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Solid-State Quantum Physics and Engineering Lab
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The lab controls the spin of electrons to create devices with low power consumption.
AboutAbout the lab
Building new devices with the spin of electrons
The Solid-State Quantum Physics and Engineering Lab (Shiraishi Lab) studies quantum spintronics, which focuses on controlling spin angular momentum, one of the quantum properties of electrons.
Drawing on modern physics such as quantum mechanics, solid-state physics, relativity, and topology, the lab conducts a wide range of research from fundamentals to applications.
Its results have been published in many top-tier academic journals, and the lab leads this field worldwide.
Key terms
- Spintronics
- Electronics that uses not only the charge of electrons but also their spin (a property like a tiny magnet)
- Pure spin current
- A phenomenon in which only spin flows, without any flow of charge
- Spin-orbit interaction
- A relativistic effect in solids that couples the spin of an electron to its motion
ResearchResearch themes
The lab works on spintronics in Group IV semiconductors, control of pure spin currents, thermoelectric spintronics, and studies of spin-orbit interaction and topological insulators.
*Illustrative imageUsing spin in silicon
The lab studies spintronics using Group IV semiconductors such as silicon, germanium, and molecules. With the operation of spin transistors and reconfigurable logic circuits as application goals, the lab also conducts joint research with companies.
*Illustrative imageSpin flow without energy loss
The lab generates and transmits pure spin currents, which involve no flow of charge, in semiconductors and metals at room temperature. It aims to control them, understand their fundamental properties, and create new devices with ultra-low power consumption.
*Illustrative imageCreating spin flow from heat
Centered on the spin-dependent Seebeck effect, in which heat generates a pure spin current, the lab explores a new area of condensed matter physics that merges thermoelectrics and spintronics.
*Illustrative imageMaking use of relativity and topology
The lab studies relativistic effects in solids such as the inverse spin Hall effect and spin-orbit interaction, as well as topological insulators. It aims for efficient conversion between spin and charge and for mechanisms of information transmission without energy loss.
MembersFaculty
The faculty of the Solid-State Quantum Physics and Engineering Lab are Professor Masashi Shiraishi and Associate Professors Jorge Puebla and Ryo Ohshima.
- ProfessorMasashi Shiraishi
- Associate ProfessorPUEBLA Jorge
- Associate ProfessorRyo Ohshima
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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: “MTJ with Transparent Background” OJB Quantum / CC BY 4.0 (cropped)
- Using spin in silicon: “IMaGe 31072R – Silicon Wafer 20120926” Rob Bulmahn / CC BY 2.0 (cropped)
- Spin flow without energy loss: “Spintronic Devices ( )” National Institute of Standards and Technology / Public domain (cropped)
- Creating spin flow from heat: “Thermoelectric Seebeck power module” Gerardtv / CC BY-SA 3.0 (cropped)
- Making use of relativity and topology: “Bismuth crystal pyramid” Imunarriz / CC BY-SA 3.0 (cropped)
- Related lab (Electronic Materials and Physical Properties Engineering Lab): “AFM-Raman-TERS” AAMonitor96 / CC BY-SA 3.0 (cropped)
- Related lab (Optical Functional Device Engineering Lab): “Blue led 09 of 10” Renato.pierri / CC BY-SA 4.0 (cropped)
- Related lab (Nanoprocess Engineering Lab): “Microscopy Lab Tour at the Colorado School of Mines” SparkFun Electronics from Boulder, USA / CC BY 2.0 (cropped)
- Related lab (Quantum Electromagnetics Engineering Lab): “17jila003 3d strontium atomic clock” National Institute of Standards and Technology / Public domain (cropped)
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