| Автор | P I Kuindersma |
| Автор | G A Sawatzky |
| Автор | J Kommandeur |
| Дата выпуска | 1975-09-21 |
| dc.description | Static magnetic susceptibility measurements as well as ESR measurements at 9 GHz on two complex M<sup>+</sup>(TCNQ)<sub>2</sub><sup>-</sup> salts are reported. The results reveal that the on-site interaction between electrons is strongly reduced for its 'bare ion' value, though the on-site interaction is still larger than the total one-electron bandwidth. At high temperatures (20-250K) the electronic structure of both materials shows (pseudo one-dimensional) correlated metal features (finite density of states at Fermi energy, enhanced moments). At low T ( approximately 20K) the susceptibility measurements indicate a rather sudden breakdown of the correlated metal behaviour. Arguments are given that the short-range antiferromagnetic interaction must be held responsible for this breakdown. Below the 'transition', one of the materials indeed shows the spin behaviour of an antiferromagnetic Heisenberg insulating state. The low-T spin behaviour of the other salt is rather obscured by an additional contribution to the spin susceptibility, presumably due to impurities. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Electron correlation in complex TCNQ salts. I |
| Тип | paper |
| DOI | 10.1088/0022-3719/8/18/020 |
| Print ISSN | 0022-3719 |
| Журнал | Journal of Physics C: Solid State Physics |
| Том | 8 |
| Первая страница | 3005 |
| Последняя страница | 3015 |
| Аффилиация | P I Kuindersma; Lab. of Phys. Chem., Groningen, Netherlands |
| Аффилиация | G A Sawatzky; Lab. of Phys. Chem., Groningen, Netherlands |
| Аффилиация | J Kommandeur; Lab. of Phys. Chem., Groningen, Netherlands |
| Выпуск | 18 |
