Highlight: Probing a complex oxide interface directly

Jul 21, 2010
Probing a complex oxide interface directly
Electronic properties have been measured as function of the distance to the interface between La2/3Ca1/3MnO3 and Nb-doped SrTiO3.

(PhysOrg.com) -- A novel way to directly detect the electronic properties at a complex oxide interface has been demonstrated by users from Argonne's Advanced Photon Source working collaboratively with researchers in the Electronic & Magnetic Materials Devices Group (Argonne National Laboratory).

While powerful spatially resolved tools exist for visualizing the chemical and magnetic structure of an interface, direct observation of electronic behavior across the interface presents a major experimental challenge.

The scientists harnessed the high sensitivity to electronic local density of states (LDOS) of cross-sectional scanning tunneling microscopy and spectroscopy (XSTM/S) to visualize at the interface between colossal magnetoresistant manganite La2/3Ca1/3MnO3 and semiconducting Nb-doped SrTiO3.

By extending XSTM/S to the interface, they mapped the LDOS across the boundary, unambiguously visualizing the by the location of the valence band, and elucidated the fundamental issue of band alignment at a complex oxide heterointerface.

Explore further: Strongly interacting electrons turn oxide interfaces into magnetically controlled and extra-efficient solar cells

More information: T.Y. Chien, J. Liu, J. Chakhalian, N. P. Guisinger, and J. W. Freeland, Phys. Rev. B, 82, 041101(R) (2010). Editor’s Suggestion

add to favorites email to friend print save as pdf

Related Stories

Highlight: Nanopatterning of Graphene

Mar 11, 2010

Center for Nanoscale Materials (CNM) at Argonne National Laboratory users from Politecnico di Milano in Italy, working collaboratively with researchers in the Electronic & Magnetic Materials & Devices Group, ...

Superconductivity Physicists Puzzled by the Weird Behavior of Electrons

Jul 30, 2004

The weird behavior of electrons tunneling across an atomically flat interface within a cuprate superconductor has defied explanation by theories of high-temperature superconductivity. As will be reported in the journal Physical Review Letters, a team of scientists l ...

Recommended for you

Three-dimensional metamaterials with a natural bent

Oct 24, 2014

Metamaterials, a hot area of research today, are artificial materials engineered with resonant elements to display properties that are not found in natural materials. By organizing materials in a specific way, scientists ...

Scientists develop compact medical imaging device

Oct 23, 2014

Scientists at the MIRA research institute, in collaboration with various companies, have developed a prototype of a handy device that combines echoscopy (ultrasound) with photoacoustics. Combining these two ...

User comments : 1

Adjust slider to filter visible comments by rank

Display comments: newest first

solidspin
not rated yet Jul 23, 2010
huh? hadrondivorce? placeable neutron? what on earth are you talking about?