Abstract
The interrelation between the electronic properties and the crystal structure was studied in the two-dimensional organic superconductor α-(BEDT-TTF)2NH4Hg(SCN)4 under the uniaxial strain. For this purpose, a novel type of four-circle X-ray diffractometer and a pressure cell were developed. The lattice parameter was found to change as expected from the uniaxial strain created in the sample. The structure analysis based on 936 Bragg reflections suggests that the electronic system becomes more isotropic in the conducting plane and the density-of-states at the Fermi level increases by about 7% under the uniaxial strain created by the piston pressure of 0.1 GPa applied parallel to the b*-axis. This change in the density-of-states is consistent with the observed increase in the superconducting critical temperature from 1.5 to 2 K in the framework of the BSC expression.
| Original language | English |
|---|---|
| Pages (from-to) | 307-311 |
| Number of pages | 5 |
| Journal | Current Applied Physics |
| Volume | 1 |
| Issue number | 4-5 |
| DOIs | |
| Publication status | Published - Nov 2001 |
| Externally published | Yes |
Fingerprint
Keywords
- 07.85.Jy
- 61.10.-i
- 74.62.Fj
- 74.70.Kn
- Crystal structure
- Organic superconductor
- Uniaxial compression
- Uniaxial strain
- X-ray diffraction
ASJC Scopus subject areas
- Condensed Matter Physics
- Surfaces and Interfaces
Cite this
Electronic and crystal structures of organic superconductors under the uniaxial strain. / Kagoshima, S.; Kondo, Ryusuke; Maesato, M.
In: Current Applied Physics, Vol. 1, No. 4-5, 11.2001, p. 307-311.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electronic and crystal structures of organic superconductors under the uniaxial strain
AU - Kagoshima, S.
AU - Kondo, Ryusuke
AU - Maesato, M.
PY - 2001/11
Y1 - 2001/11
N2 - The interrelation between the electronic properties and the crystal structure was studied in the two-dimensional organic superconductor α-(BEDT-TTF)2NH4Hg(SCN)4 under the uniaxial strain. For this purpose, a novel type of four-circle X-ray diffractometer and a pressure cell were developed. The lattice parameter was found to change as expected from the uniaxial strain created in the sample. The structure analysis based on 936 Bragg reflections suggests that the electronic system becomes more isotropic in the conducting plane and the density-of-states at the Fermi level increases by about 7% under the uniaxial strain created by the piston pressure of 0.1 GPa applied parallel to the b*-axis. This change in the density-of-states is consistent with the observed increase in the superconducting critical temperature from 1.5 to 2 K in the framework of the BSC expression.
AB - The interrelation between the electronic properties and the crystal structure was studied in the two-dimensional organic superconductor α-(BEDT-TTF)2NH4Hg(SCN)4 under the uniaxial strain. For this purpose, a novel type of four-circle X-ray diffractometer and a pressure cell were developed. The lattice parameter was found to change as expected from the uniaxial strain created in the sample. The structure analysis based on 936 Bragg reflections suggests that the electronic system becomes more isotropic in the conducting plane and the density-of-states at the Fermi level increases by about 7% under the uniaxial strain created by the piston pressure of 0.1 GPa applied parallel to the b*-axis. This change in the density-of-states is consistent with the observed increase in the superconducting critical temperature from 1.5 to 2 K in the framework of the BSC expression.
KW - 07.85.Jy
KW - 61.10.-i
KW - 74.62.Fj
KW - 74.70.Kn
KW - Crystal structure
KW - Organic superconductor
KW - Uniaxial compression
KW - Uniaxial strain
KW - X-ray diffraction
UR - http://www.scopus.com/inward/record.url?scp=0041415951&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0041415951&partnerID=8YFLogxK
U2 - 10.1016/S1567-1739(01)00029-3
DO - 10.1016/S1567-1739(01)00029-3
M3 - Article
VL - 1
SP - 307
EP - 311
JO - Current Applied Physics
JF - Current Applied Physics
SN - 1567-1739
IS - 4-5
ER -