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Niimi Lab
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The lab explores the physics of electron charge and spin using atomic-layer devices.
AboutAbout the lab
Exploring nanoscale properties and spin currents
The Niimi Lab (Nanoscale Physical Properties Group) fabricates devices in which real materials are shrunk to the nanometer scale and studies their physical properties.
The lab's research aims to explore properties specific to the nanoscale and to detect spin-related properties using spin currents.
Prof. Niimi's motto is to enjoy research through free and lively discussion regardless of age or year of study.
On the lab's website, it is introduced under the name "Nanoscale Physical Properties Lab."
Key terms
- Spin current
- A flow of spin angular momentum. Spin is a property of electrons that is the source of magnetism.
- Low-dimensional system
- A system in which, unlike three-dimensional materials, unusual phenomena appear as the dimensionality decreases, such as two-dimensional and one-dimensional systems.
- Quantum electron optics
- A research field that uses electrons in solids to carry out experiments manipulating quantum states, of the kind that have been done with photons.
NewsLab news
A paper reporting the discovery of acoustic current was published in Physical Review B and selected as an Editors’ Suggestion
A paper on the spin current conversion efficiency of Fe5GeTe2 was published in Physical Review Materials (joint research)
A doctoral student won the Nico Hendrix Special Award at InQuot2026
A paper on Raman spectroscopy measurements of GdGaI, an excitonic insulator candidate, was published in Physical Review B (joint research)
ResearchResearch themes
Using devices shrunk to the nanometer scale as its stage, the lab works on the physical properties of atomic-layer devices, spin currents and spin fluctuations, and quantum electron optics experiments using electrons in solids. Dealing with the two degrees of freedom of electrons, charge and spin, it aims to explore properties specific to the nanoscale and to detect spin-related properties using spin currents.
*Illustrative imagePhysical properties of atomic-layer devices
The lab works with low-dimensional systems, in which unusual phenomena appear as dimensionality decreases, specifically ideal two-dimensional systems obtained by mechanically exfoliating crystals. It processes crystals that show superconductivity or magnetism into devices that are atomically thin, and observes their characteristic properties.
*Illustrative imageSpin currents and spin fluctuations
A spin current is a flow of spin angular momentum and forms the foundation of spintronics, which deals with the two degrees of freedom of charge and spin. Much spintronics research centers on developing low-power-consumption devices that use spin currents.
*Illustrative imageQuantum electron optics experiments
In the field of quantum optics, pioneering experiments have manipulated the quantum states of photons. The lab works on quantum electron optics, which carries out similar experiments using electrons in solids.
MembersFaculty
The Niimi Lab's members consist of faculty, collaborating members, postdoctoral researchers, doctoral, master's, and undergraduate students, and secretaries.As of 2026
- ProfessorYasuhiro Niimi
- Associate ProfessorShintaro Takada
- Assistant ProfessorNan Jiang
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: “Nanoscope” Matt Howard / CC BY-SA 2.0 (cropped)
- Physical properties of atomic-layer devices: “Graphene exfoliated 2014Apr04 Harlequin Mantis” Harlequin Mantis / CC BY-SA 4.0 (cropped)
- Spin currents and spin fluctuations: “Active region of the thin-film splitted Hall structure of a 3D magnetic sensor” TetyanaMarusenkova / CC BY-SA 3.0 (cropped)
- Quantum electron optics experiments: “Mach Zehnder interferometer schematic diagram” Spani2 / CC BY-SA 4.0 (cropped)
- Related lab (Kudo Lab): “Magnetic Levitation Experiment, Science Gallery Dublin, Ireland” Maria Delaney / CC BY-SA 4.0 (cropped)
- Related lab (Asano Lab): “Wafer with Pentium chips” Naotake Murayama from Los Altos, CA, USA / CC BY 2.0 (cropped)
- Related lab (Condensed Matter Quantum Computing Lab): “Quasicrystal1” J.W. Evans, The Ames Laboratory, US Department of Energy / Public domain (cropped)
- Related lab (Nuclear Matter Subgroup (Experimental Nuclear Physics) Lab): “PRIME lab Van de Graaff accelerator” Patrick Finnegan / CC BY 2.0 (cropped)
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