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: Can perovskites and silicon team up to boost industrial solar cell efficiencies?

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

New insights found in black hole collisions

Mar 27, 2015

New research provides revelations about the most energetic event in the universe—the merging of two spinning, orbiting black holes into a much larger black hole.

X-rays probe LHC for cause of short circuit

Mar 27, 2015

The LHC has now transitioned from powering tests to the machine checkout phase. This phase involves the full-scale tests of all systems in preparation for beam. Early last Saturday morning, during the ramp-down, ...

Swimming algae offer insights into living fluid dynamics

Mar 27, 2015

None of us would be alive if sperm cells didn't know how to swim, or if the cilia in our lungs couldn't prevent fluid buildup. But we know very little about the dynamics of so-called "living fluids," those ...

First glimpse inside a macroscopic quantum state

Mar 27, 2015

In a recent study published in Physical Review Letters, the research group led by ICREA Prof at ICFO Morgan Mitchell has detected, for the first time, entanglement among individual photon pairs in a beam ...

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?

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.