New scenario for the decay of spin-Peierls state in CuGeO3 : Fe. Onset of a quantum critical point

Authors
Demishev, SV Bunting, RV Leonyuk, LI Obraztsova, ED Pronin, AA Sluchanko, NE Samarin, NA Terekhov, SV
Citation
Sv. Demishev et al., New scenario for the decay of spin-Peierls state in CuGeO3 : Fe. Onset of a quantum critical point, JETP LETTER, 73(1), 2001, pp. 31-34
Citations number
18
Categorie Soggetti
Physics
Journal title
JETP LETTERS
ISSN journal
00213640 → ACNP
Volume
73
Issue
1
Year of publication
2001
Pages
31 - 34
Database
ISI
SICI code
0021-3640(2001)73:1<31:NSFTDO>2.0.ZU;2-Y
Abstract
It is found experimentally that the introduction of 1% Fe in the CuGeO3 mat rix gives rise to a strong disorder in the magnetic subsystem and leads to an appearance of the chi similar to 1/T-alpha(alpha approximate to 0.36) lo w-temperature asymptotic form for magnetic susceptibility over a wide tempe rature range 1.7 less than or equal to T less than or equal to 30 K. A mode l attributing this anomaly to the suppression of spin-Peierls state as a re sult of the formation of the quantum critical point is proposed. (C) 2001 M AIK "Nauka/Interperiodica".