Division of Mathematical and Physical ResearchLab. ID
Low Temperature Physics
fieldSciences
MP06
Laboratory web site
http://ltphys.w3.kanazawa-u.ac.jp/wp/Research subjects
Macroscopic quantum phenomena such as superfluidity and superconductivity occur at low temperatures becauseof small thermal fluctuation. Our research focuses on such interesting physical phenomena that occur in lowtemperature environments.
3The reaseah group led by Prof. Matsumoto and Prof. Abe studies superfluidity of He, quantum transition andcriticality of heavy Fermion compounds, nuclear magnetism of rare earth Pr compounds, and so on by means of
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He-4He dilution refrigerator and Cu single stage nuclear demagnetization refrigerator in micro Kelvin temperatures.
Experiments in such low temperaures are worked at limited laboratories in the world. In milli-Kelvin temperature
4range, we also study quantum fluid and solid, He superfluidity in porous materials, quantum transition from theexperiments of specific heat, magnetic susceptibility, thermal expansion, magnetostriction, and acoustic properties
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using dilution refrigerator, He cryostat and cryostat with 15 T superconducting magnet. Magnetic refrigeration thatmakes use of magneto caloric effect is studied from 1 K to room temperature. We have both magnetic materials andrefrigeration system of magnetic refrigeration.
Prof. Yoshida's group mainly focuses on experimental studies of superconductivity and magnetism using scanningtunneling microscopy (STM), a key analytical technique in nanoscience, at very low temperatures, high magnetic
fields, and in ultra-high vacuum. In particular, using spin-polarized STM whichi visualizes spin states on an atomicscale, the group studies new types of superconductors such as cuprate, iron-based, and heavy-fermion
superconductors, in which magnetism is considered to be intrinsically involved in the mechanism ofsuperconductivity, The group is also working on development of electron spin resonance STM based on spinpolarized STM, synthesis of atomically controlled superlattice thin films (artificial lattices) using a molecular beam
epitaxy system, precise magnetization measurements in the mK temperature range and high magnetic fields, and thedevelopment of magnetic field angle-resolved physical properties measurement system.
Prof. Ohashi's group (Faculty of Geoscience and Civil Engineering) grows high-quality single crystals of materials
that are expected to have strong electronic correlations, such as heavy-fermion materials. They are searching for
new quantum phase transitions and critical phenomena by controlling three thermodynamic parameters; highpressure, low temperatures, and high magnetic fields.
Prof. Tsuji's group (Faculty of Education, Institute of Human and Social Sciences) uses a nanoscience techniquecalled break junctions and studies quantum conduction phenomena in point junctions and tunnel junctions at lowtemperatures.
Master/Doctor course: Education policy, curriculum, typical activity in the laboratory
Professor Matsumoto, Professor Abe and Professor Yoshida are conducting several experimental groups as main
stuffs. Professor Ohashi and Professor Tsujii may also collaborate with them. Each group is consists of graduate
couse students and under graduate students, because long period experiments in low temperature need team work.
Newcomers will choose research subject on the basis of his interest and belong to an experimental group. We haveclose discussions between faculty staff and students and conference meeting on all the groups so that experimental
results and plans are discussed. Seminor be students and article reading are also carried.
Outcomes are presented at academic meeting and published as journal paper.
Daily life in the laboratory, etc.
Our experimental apparatus are mainly installed in Kanazawa University low temperature laboratory. Low
temperature experiments become long period experiments so that it will last late at night and sometimes needmachine check in holidays. Then, experiments are carried out in collaboration with group members and faculty stuff.
It is necessary to construct original experimental setup, cell, measuring system or both because commercialmachines don't have enough performance. Sometimes improvements of commercial machines are required.
Technical skill such as machine, electronic work will be necessary to learn.
Researchers and students from foreign countries visit our laboratory. Our low temperature laboratory has
collaboration with Kazan Federal University in Russia. Students visited between Russia and Japan.
We have parties and BBQ for recreation.
Message or comments by the laboratory faculty staffs
Cooperative personality will be necessary because of group experiments. We believe that faculty staff and students
are equal as researcher. We hope every student has his own idea and aggressiveness enough to make forward his
research and academic interest in other research groups.
Alumnus have jobs in various fields, such as academic post, postdoc researcher, high school teacher, researcher inprivate companies.

Laboratory mail address

Koichi Matsumoto <kmatsu *at* staff.kanazawa-u.ac.jp>
Satochi Abe <abesi *at* staff.kanazawa-u.ac.jp>
Yasuo Yoshida<yyoshida *at* se.kanazawa-u.ac.jp>
Hiroyuki Tsujii<htsujii *at* staff.kanazawa-u.ac.jp>
Masashi Ohashi<ohashi *at* se.kanazawa-u.ac.jp>