| Zugriffsnummer | 29171 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | Evidence for a phase transition in glasses at very low temperature: a macroscopic quantum state of tunneling systems? |
| Autor(in); Institution |
Strehlow, Peter; 7.32, Tieftemperaturmetrologie, PTB-Berlin
Enss, C.; Institut für Angewandte Physik, Universität Heidelberg, Heidelberg, GERMANY
Hunklinger, S.; Institut für Angewandte Physik, Universität Heidelberg, Heidelberg, GERMANY
|
| Quelle/Jahr | Physical Review Letters: 80 (1998), 24, 5361 - 5364 |
| ISSN | 0031-9007 (PRINT) ; 1079-7114 (ONLINE) |
| DOI | |
| Verlag | Ridge, NY: The American Physical Society |
| Klassifikationscode | PACS: 61.43.Fs ; PACS: 64.90.+b ; PACS: 77.22.Ch |
| Zusammenfassung | Dielectric measurements at very low temperature indicate that in the multicomponent glass BaO-Al2O3-SiO2 a phase transition occurs at 5.84 mK. Below that temperature small magnetic fields of the order of 10μT cause surprising changes of the dielectric constant although the glass is insensitive to fields up to 20 T above 50 mK. The experimental findings may be interpreted as the signature of the formation of a new phase in which many tunneling systems perform a coherent motion resulting in a macroscopic wave function. |
