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Evidence for a generic quantum transition in high-Tc cuprates

Evidence for a generic quantum transition in high-Tc cuprates
Evidence for a generic quantum transition in high-Tc cuprates
We study the low-energy spin fluctuations and superfluid density of a series of pure and Zn-substituted high-Tc superconductors (HTS) using the muon spin relaxation and ac-susceptibility techniques. At a critical doping state, pc, we find (i) simultaneous abrupt changes in the magnetic spectrum and in the superconducting ground state and (ii) that the slowing down of spin fluctuations becomes singular at T = 0. These results provide experimental evidence for a quantum transition that separates the superconducting phase diagram of HTS into two distinct ground states.
1550-235X
064501-[5pp]
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.
884dc580-0bb6-467e-bfca-9ab55a773954
Scott, C.A.
b319e8e2-765e-4cec-be80-705cfac5d0d3
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.
884dc580-0bb6-467e-bfca-9ab55a773954
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) Evidence for a generic quantum transition in high-Tc cuprates. Physical Review B, 66 (6), 064501-[5pp]. (doi:10.1103/PhysRevB.66.064501).

Record type: Article

Abstract

We study the low-energy spin fluctuations and superfluid density of a series of pure and Zn-substituted high-Tc superconductors (HTS) using the muon spin relaxation and ac-susceptibility techniques. At a critical doping state, pc, we find (i) simultaneous abrupt changes in the magnetic spectrum and in the superconducting ground state and (ii) that the slowing down of spin fluctuations becomes singular at T = 0. These results provide experimental evidence for a quantum transition that separates the superconducting phase diagram of HTS into two distinct ground states.

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Published date: 2002

Identifiers

Local EPrints ID: 14679
URI: http://eprints.soton.ac.uk/id/eprint/14679
ISSN: 1550-235X
PURE UUID: 3372f996-27b3-44dc-b982-fbbaf7ace3a4

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Date deposited: 18 Feb 2005
Last modified: 25 Nov 2019 19:32

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