TY - JOUR
T1 - Cu spin dynamics in the overdoped regime of La2-x Srx Cu1-y Zny O4 probed by muon spin relaxation
AU - Risdiana,
AU - Adachi, T.
AU - Oki, N.
AU - Yairi, S.
AU - Tanabe, Y.
AU - Omori, K.
AU - Koike, Y.
AU - Suzuki, T.
AU - Watanabe, I.
AU - Koda, A.
AU - Higemoto, W.
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2008/2/26
Y1 - 2008/2/26
N2 - Muon-spin-relaxation measurements have been performed for partially Zn-substituted La2-x Srx Cu1-y Zny O4 with y=0-0.10 in the overdoped regime up to x=0.30. In the 3% Zn-substituted samples up to x=0.27, exponential-like depolarization of muon spins has been observed at low temperatures, indicating a Zn-induced slowing down of the Cu spin fluctuations. The depolarization rate decreases with increasing x, and almost no fast depolarization of muon spins has been observed for x=0.30 where superconductivity disappears. The present results suggest that there is no quantum critical point at x∼0.19. These results are discussed in terms of the stripe-pinning model and the phase-separation model.
AB - Muon-spin-relaxation measurements have been performed for partially Zn-substituted La2-x Srx Cu1-y Zny O4 with y=0-0.10 in the overdoped regime up to x=0.30. In the 3% Zn-substituted samples up to x=0.27, exponential-like depolarization of muon spins has been observed at low temperatures, indicating a Zn-induced slowing down of the Cu spin fluctuations. The depolarization rate decreases with increasing x, and almost no fast depolarization of muon spins has been observed for x=0.30 where superconductivity disappears. The present results suggest that there is no quantum critical point at x∼0.19. These results are discussed in terms of the stripe-pinning model and the phase-separation model.
UR - http://www.scopus.com/inward/record.url?scp=40849150705&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=40849150705&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.77.054516
DO - 10.1103/PhysRevB.77.054516
M3 - Article
AN - SCOPUS:40849150705
SN - 0163-1829
VL - 77
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
IS - 5
M1 - 054516
ER -