2005 Annual Report Vol.33 - 中研院物理研究所 - Academia Sinica

lasers.
III. Nanomaterial and low temperature physics
The nanomaterial and low temperature physics research group was first established in 1989.
Now it involves two full-time faculty members and maintains a size of around 15
researchers comprised of visiting scholars, post-doctors, assistants, and students. Our
research interests include phenomena that associated with strongly correlated electrons
such as heavy fermion physics, Kondo effect and high temperature superconductivity.
Other areas include the understanding of quantum-size effects on the above mentioned
phenomena and others such as thermopower and thermoconductivity in alloys and/or
semiconductors. We have developed our own research equipments such as a SQUID
magnetometer operated in He3 cryostat, low-temperature microcalorimeter, and
measurements of thermopower & thermoconductivity, transport measurements to 20 Tesla
in a dilution refrigerator; magnetic susceptibility and electrical resistivity measurements at
high pressure up to 20 kilobars. We also have setups for the preparation of nanoparticles,
thin film and single crystals. Some past research accomplishments are summarized in the
following:
• We have observed several interesting quantum-size effects on the magnetisim or
superconductivity in nanomaterials of heavy fermion systems.
• We have developed new methods for the production of high quality magnetic/or
superconducting nanoparticles and thin films
• We have developed a new wide-range low temperature sensor for calorimeter
application using transition metal oxides.
• We have observed the coexistence of magnetic order and superconductivity in
Ru-based double perovskite oxides.