2007 Fiscal Year Final Research Report Summary
Development of high pressure cell and study of pressure on the strong correlated system
| Project/Area Number |
16204022
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (A)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Condensed matter physics II
|
|---|
| Research Institution | The University of Tokyo |
|---|
Principal Investigator |
UWATOKO Yoshiya The University of Tokyo, ISSP, Associate Professor (40213524)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
ISHIMOTO Hidehiko The University of Tokyo, ISSP, Professor (60044773)
HEDO Masato The University of Ryukyus, College of Science, Associate Professor (00345232)
UMEHARA Izuru Yokohama National University, Faculty of Engneering, Associate Professor (90251769)
SHIGEOKA Toru Yamaguchi University, Scienee of Engineering, Professor (50167441)
MATSUBAYASHI Kazuyuki The University of Tokyo, ISSP, Assistant Professor (10451890)
|
|---|
| Project Period (FY) |
2004 – 2007
|
| Keywords | Cubic Anvil Cell / Diamond Anvil Cell / Piston Cylinder Cell / High Pressure Apparatus / Pressure Induced Phase Transition / Strong Correlated System / Heavy Fermion / Sunerconductor |
|---|
| Research Abstract |
The combination of low temperature, high pressure and magnetic field provides a powerful means to access abroad range of energy scales and thus study physical phenomena such as metal-insulator transitions, pressure induced superconductivity and the evolution of the Fermi surface as a material is driven into the superconducting state. We have been studying to understanding of a new phenomenon to occur under going interplay (and/or competition) between magnetism and superconductivity and pressure induced novel phase transitions etc.
A micro high pressure cell and a cubic anvil high pressure cell have been developed ix measurements of specific heat, magnetization and electrical resistivity at low temperature, respectively. This small cell device can be used up to 2 GPa. And, cubic anvil high pressure cell can be used up to 8GPa at 0.57K.
We discover that the one-dimensional organic conductor (TMTTF)_2XF_6(X=Sb, As), ZrTe_3 and YbCo_2Zn_20 are pressure induced superconductor; pressure induced reentrant superconductor and pressure induced magnetic compound, respectively.
|
