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SUMMARY:Tailoring properties of complex oxides\, one atomic layer at a tim
 e - Anand Bhattacharya\, Argonne National Laboratory
DTSTART:20130228T150000Z
DTEND:20130228T160000Z
UID:TALK43790@talks.cam.ac.uk
CONTACT:Leona Hope-Coles
DESCRIPTION:The complex oxides have set the stage for some of the most int
 riguing phenomena found in condensed matter including high-temperature sup
 erconductivity\, multiferroicity and many exotic forms of magnetism. In re
 cent years\, it has become possible to create heterostructures of differen
 t complex oxides in an atomic layer-by-layer manner. These structures ofte
 n have properties that are distinct from those of their constituent materi
 als\, and could be used to tailor novel electronic and magnetic states. In
  my talk\, I will focus on digital superlattices of (LaMnO3)p/(SrMnO3)q\, 
 where p\, q are integers\, and the La/Sr atoms are ordered in two-dimensio
 nal planes. LaMnO3 and SrMnO3 are both antiferromagnetic insulators. Howev
 er\, depending upon the choice of p and q\, the superlattices show a wide 
 range of properties\, including a ferromagnetic metal\, an antiferromagnet
  with an enhanced ordering (Néel) temperature and a delta-doped ferromagn
 et within an antiferromagnetic host. The ability to synthesize materials w
 ith single atomic layer precision also allows us to tailor single crystals
  with attributes such as artificially broken inversion symmetry\, that may
  not be possible to realize in bulk samples. I will present an example of 
 this and its consequences in quasi two-dimensional  nickelates.  The appro
 aches presented here can be explored for a broad range of materials\, and 
 may have implications for fundamental science as well as applications. \n\
 nReferences:\n\n [1] "Enhanced ordering temperatures in antiferromagnetic 
 manganite superlattices"\, S. May et al.\, Nature Materials 8\, 892 (2009)
 .\n\n[2] “Delta Doping of Ferromagnetism in Antiferromagnetic Manganite 
 Superlattices”\, T. Santos et al.\,  Phys. Rev. Lett. 107\, 167202 (2011
 ).\n\n
LOCATION:Pippard Lecture Theatre\, Cavendish Laboratory\, Department of Ph
 ysics
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