Critical behavior in the low-energy spin fluctuations in high-T-c superconductors
Critical behavior in the low-energy spin fluctuations in high-T-c superconductors
We study the spin fluctuations of pure and Zn-substituted La2 – x Sr x CuO4 using the muon spin relaxation technique. Superconductivity is found to coexist with low-frequency spin fluctuations over a large region of the superconducting phase diagram. The characteristic temperature of spin fluctuations detected by SR decreases with increasing x and vanishes above a critical doping x c 0.19. This value of x c coincides with the doping at which the normal state pseudogap extrapolates to zero. These results are discussed in terms of a quantum transition that separates the superconducting phase diagram of high-temperature superconductors into two distinct ground states.
spin dynamics, criticality, high-T c cuprates
335-338
Panagopoulos, C.
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Tallon, J.L.
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Rainford, B.D.
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Xiang, T.
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Cooper, J.R.
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Scott, C.A.
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2002
Panagopoulos, C.
c8723aa4-bceb-4390-8080-0788245f3897
Tallon, J.L.
bc877cc2-061c-4876-a68d-0250659b42d8
Rainford, B.D.
a57f1153-bbba-49a3-bffc-0d96087156a0
Xiang, T.
d10b5469-89a9-460e-8778-6838da6a0ef4
Cooper, J.R.
0ceebe0b-da1f-4366-8761-a1828411beb6
Scott, C.A.
b319e8e2-765e-4cec-be80-705cfac5d0d3
Panagopoulos, C., Tallon, J.L., Rainford, B.D., Xiang, T., Cooper, J.R. and Scott, C.A.
(2002)
Critical behavior in the low-energy spin fluctuations in high-T-c superconductors.
Journal of Superconductivity, 15 (5), .
(doi:10.1023/A:1021061911839).
Abstract
We study the spin fluctuations of pure and Zn-substituted La2 – x Sr x CuO4 using the muon spin relaxation technique. Superconductivity is found to coexist with low-frequency spin fluctuations over a large region of the superconducting phase diagram. The characteristic temperature of spin fluctuations detected by SR decreases with increasing x and vanishes above a critical doping x c 0.19. This value of x c coincides with the doping at which the normal state pseudogap extrapolates to zero. These results are discussed in terms of a quantum transition that separates the superconducting phase diagram of high-temperature superconductors into two distinct ground states.
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Published date: 2002
Keywords:
spin dynamics, criticality, high-T c cuprates
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Local EPrints ID: 57528
URI: http://eprints.soton.ac.uk/id/eprint/57528
ISSN: 0896-1107
PURE UUID: 00d590fc-ee1d-42a4-a8e2-98f6047f518e
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Date deposited: 14 Aug 2008
Last modified: 15 Mar 2024 11:07
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Contributors
Author:
C. Panagopoulos
Author:
J.L. Tallon
Author:
B.D. Rainford
Author:
T. Xiang
Author:
J.R. Cooper
Author:
C.A. Scott
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