2015 Fiscal Year Final Research Report
Unconventional Superconductivity in semiconductor systems
| Project/Area Number |
25800197
|
|---|
| Research Category |
Grant-in-Aid for Young Scientists (B)
|
| Allocation Type | Multi-year Fund |
|---|
| Research Field |
Condensed matter physics II
|
|---|
| Research Institution | Institute of Physical and Chemical Research |
|---|
Principal Investigator |
Kriener Markus 国立研究開発法人理化学研究所, 創発物性科学研究センター, 研究員 (60447919)
|
|---|
| Project Period (FY) |
2013-04-01 – 2016-03-31
|
| Keywords | Topological Insulators / Topological SC / Unconventional SC / Semiconductors / Polar distortion |
|---|
| Outline of Final Research Achievements |
This research project focussed on chemically simple semiconducting and insulating systems, which were thought to be candidate materials for topological insulators or possess a complicated band structure, strong spin-orbit coupling, a noncentrosymmetric structure a.s.o. where possibly unconventional superconductivity might be introduced by doping. The superconductivity in the doped topological insulators Bi2Se3 and SnTe was probed as well as various more systems. Beside superconductivity, also different interesting effects were found: In doped WSe2 a comparably large thermodynamic Figure of Merit of ~0.35 at 800 K was found along with an unexpected change in the band structure from three- to two-dimensional. In the polar system (Ge,Mn)Te, an additional ferromagnetic phase was identified which had been overlooked in the past. Moreover, it was successfully demonstrated, that (Ge,Mn)Te bears magnetic phase change memory functionality.
|
| Free Research Field |
condensed matter physics
|
