Condensed Matter Experiment Ⅰ
Low Temperature Materials Science
|Associate Professor :||Tsutomu Nojima|
|Assistant Professor :||Shintaro Nakamura|
Our group studies the quantum phenomena occurring at low temperatures in various superconductors and highly-correlated electron systems. In addition to understanding the fundamental properties of these materials, we focus on controlling them in the form of thin films and devices, which leads to finding novel physical phenomena. The current research subjects are the electric-field-induced superconductivity, two dimensional superconductivity with atomic-layer structures, exotic superconductivity in magnetic fields, and the ground state of rare earth compounds, as described below
1) Electric field induced superconductivity:
By using electric double layer transistor (EDLT) configurations, we induce the conduction carries electrostatically in the thin films or on the surfaces of insulators and explore the novel superconducting phenomena and mechanisms by tuning the carriers. Especially, we are interested in the superconductivity with broken inversion symmetry and the ambipolar doping effect in cuprates.
2) Vortex matter physics:
Recently emerging high-Tc superconductors such as cuprates, MgB2 and iron pnictides (chalcogenides) show peculiar features in their mixed stateｓ (vortex stateｓ) due to the strong thermal fluctuation and/or multi-band effect. We are studying them by using magnetization, magnetic torque and transport measurements.
3) Ground state and quantum phase transition in highly correlated electron systems:
Magnetic phase transitions and non-Fermi liquid states around absolute zero are studied in Ce based compounds by thermodynamic and transport measurements.