Pregled bibliografske jedinice broj: 396537
Anomalous Magnetic Excitations of Cooperative Tetrahedral Spin Clusters
Anomalous Magnetic Excitations of Cooperative Tetrahedral Spin Clusters // Physical Review Letters, 102 (2009), 17; 177202-1 doi:10.1103/PhysRevLett.102.177202 (međunarodna recenzija, pismo, znanstveni)
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Naslov
Anomalous Magnetic Excitations of Cooperative Tetrahedral Spin Clusters
Autori
Prša, Krunoslav ; Ronnow, H. M. ; Zaharko, O. ; Christensen, N. B. ; Jensen, J. ; Chang, J. ; Streule, S. ; Jime´nez-Ruiz, M. ; Berger, H. ; Prester, Mladen ; Mesot, J.
Izvornik
Physical Review Letters (0031-9007) 102
(2009), 17;
177202-1
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, pismo, znanstveni
Ključne riječi
inelastic neutron scattering; magnetic order; spin excitations
Sažetak
An inelastic neutron scattering study of Cu2Te2O5X2 (X=Cl, Br) shows strong dispersive modes with large energy gaps persisting far above TN, notably in Cu2Te2O5Br2. The anomalous features: a coexisting unusually weak Goldstone-like mode observed in Cu2Te2O5Cl2 and the size of the energy gaps cannot be explained by existing theories, such as our mean-field or random-phase approximation. We argue that our findings represent a new general type of behavior due to intercluster quantum fluctuations and call for development of a new theoretical approach.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
POVEZANOST RADA
Projekti:
035-0352843-2845 - Kvantni magneti: Osnovna stanja u kompeticiji (Prester, Mladen, MZOS ) ( CroRIS)
Ustanove:
Institut za fiziku, Zagreb
Profili:
Mladen Prester
(autor)
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus
- MEDLINE
