Improving the performance of hot-electron bolometers and solid state coolers with disordered alloys
| Autor: | I. J. Maasilta, L. J. Taskinen |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Physics
Coupling Physics and Astronomy (miscellaneous) Condensed matter physics Phonon Doping Relaxation (NMR) chemistry.chemical_element 02 engineering and technology Manganese Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 021001 nanoscience & nanotechnology 01 natural sciences Condensed Matter::Materials Science chemistry Impurity Condensed Matter::Superconductivity 0103 physical sciences Condensed Matter::Strongly Correlated Electrons Kondo effect 010306 general physics 0210 nano-technology Spin-½ |
| Zdroj: | Applied Physics Letters. 89:143511 |
| ISSN: | 1077-3118 0003-6951 |
| DOI: | 10.1063/1.2357555 |
| Popis: | We have used normal metal-insulator-superconductor tunnel junctions as thermometers at sub-Kelvin temperatures to study the electron-phonon (e-p) interaction in thin Aluminum films doped with Manganese, as a function of Manganese concentration. Mn in Al is known to be a Kondo impurity with extremely high Kondo temperature $T_K \sim$ 500 K, thus our results probe the e-p coupling in the fully spin compensated, unitary limit. The temperature dependence of the e-p interaction is consistent with the existing theory for disordered metals, however full theory including the Kondo effect has not been worked out yet. The strength of the interaction decreases with increasing Manganese concentration, providing a means to improve sensitivity of detectors and efficiency of solid state coolers. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|