Two-Dimensional Magnetic and Superconducting Phases in Metal-Insulator La2-xSrxCuO4 Superlattices Measured by Muon-Spin Rotation

Journal Article · Wed Jun 08 00:00:00 EDT 2011 · Physical Review Letters

OSTI ID:1040482

Gozar, A; Suter, A; Morenzoni, E; Prokscha, T; Wojek, B M; Luetkens, H; Nieuwenhuys, G; Logvenov, G; Bozovic, I

We show, by means of low-energy muon-spin rotation measurements, that few-unit-cells thick La{sub 2}CuO{sub 4} layers synthesized digitally by molecular beam epitaxy are antiferromagnetically ordered. Below a thickness of about 5 CuO{sub 2} layers the long-range ordered state breaks down, and a magnetic state appears with enhanced quantum fluctuations and a reduced spin stiffness. This magnetic state can exist in close proximity (few {angstrom}) to high-temperature superconducting layers, without transmitting supercurrents.

• Research Organization: Brookhaven National Lab. (BNL), Upton, NY (United States)
• Sponsoring Organization: USDOE SC OFFICE OF SCIENCE (SC)
• DOE Contract Number: DE-AC02-98CH10886
• OSTI ID: 1040482
• Report Number(s): BNL-96199-2011-JA; PRLTAO; KC0201050; TRN: US201210%%658
• Journal Information: Physical Review Letters, Vol. 106, Issue 23; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
FLEXIBILITY
FLUCTUATIONS
MOLECULAR BEAM EPITAXY
ROTATION
SPIN
SUPERLATTICES
THICKNESS