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Yamashita Lab
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The lab explores quantum phenomena that emerge at temperatures close to absolute zero.
AboutAbout the lab
Searching for new phenomena at low temperatures no one has reached
The Yamashita Lab studies quantum phenomena that appear at extremely low temperatures, especially quantum condensed phenomena known as quantum liquids.
The lab investigates the thermal Hall effect of excitations that do not carry electricity, multipolar order probed by NMR, and superconductivity and quantum critical phenomena in strongly correlated electron systems.
The lab also takes on the properties of electrons at ultralow temperatures, even lower than those reachable with a dilution refrigerator, and develops the refrigerators and techniques needed for this.
Key terms
- Thermal Hall effect
- A phenomenon in which, when a magnetic field is applied to a heat current, a temperature difference arises in the direction perpendicular to both the heat current and the magnetic field
- Quantum spin liquid
- A state in which, because of quantum mechanical fluctuations, the spins do not align even when cooled to near absolute zero
- Dilution refrigerator
- A refrigerator that mixes two kinds of helium and can cool down to about 0.02 degrees above absolute zero
NewsLab news
Paper on the thermal Hall effect of MnPS3 published in Physical Review B
A doctoral student received the Best Poster Award at the WINGS-QSTEP Colloquium
Paper on the magnetic-field angle dependence of the thermal Hall effect in Na2X2TeO6 accepted by Scientific Reports
Paper on the anomalous thermal Hall effect in CsV3Sb5 accepted by Science Advances
Paper on an NMR study of GaV4Se8 accepted by PRB and selected as an Editors' Suggestion
ResearchResearch themes
The lab focuses on quantum condensed phenomena that appear at temperatures close to absolute zero, such as quantum spin liquids, superconductivity, and quantum critical phenomena. Its basic approach is to develop new low-temperature and measurement techniques and to search for phenomena that are not yet known.
*Illustrative imageThermal Hall effect of excitations that do not carry electricity
Excitations that have no charge, such as magnons and phonons, do not carry electricity but do carry heat. The lab precisely measures the thermal Hall effect shown by such excitations to clarify the behavior of spin and phonon excitations.
*Illustrative imageSpin and multipolar order probed by NMR
The lab uses NMR, the resonance phenomenon of nuclear spins, to study the distribution of magnetic fields and electric field gradients inside materials. Through measurements with precisely controlled magnetic field direction and measurements under high pressure, it clarifies how spins and multipoles are arranged.
*Illustrative imageStrongly correlated electron systems at ultralow temperatures
At temperatures lower than those a dilution refrigerator can reach (about 20 mK), a regime that is almost unexplored, the lab measures the properties of f-electron compounds known as heavy-fermion systems. It is also developing ultralow-temperature refrigerators for this purpose.
*Illustrative imageFrustration and quantum spin liquids
On triangular and kagome lattices, spins cannot align well because of geometrical frustration, so quantum spin liquids that form no order even down to absolute zero may appear. The lab measures thermal conductivity and magnetic torque down to dilution-refrigerator temperatures to pin down what these states really are.
MembersFaculty
The members of the Yamashita Lab consist of faculty, researchers, doctoral and master's students, and secretaries.As of 2026
- Associate ProfessorMinoru YamashitaPublications ↗
- Assistant ProfessorHikaru TakedaPublications ↗
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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: “Gold Cryostat 8K-3” Onri Jay Benally / CC BY-SA 2.0 (cropped)
- Thermal Hall effect of excitations that do not carry electricity: “Kapellasite-89910” Leon Hupperichs / CC BY-SA 3.0 (cropped)
- Spin and multipolar order probed by NMR: “DiamondAnvilCell 003” National Institute of Standards and Technology / Public domain (cropped)
- Strongly correlated electron systems at ultralow temperatures: “Dilution Fridge 008 16K” OJB Quantum / CC BY 4.0 (cropped)
- Frustration and quantum spin liquids: “Herbertsmithite-herb03a” Robert M. Lavinsky / CC BY-SA 3.0 (cropped)
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