Intrinsic interfacial phenomena in manganite heterostructures
C A F Vaz1, F J Walker, C H Ahn
1Swiss Light Source, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.
Journal of Physics. Condensed Matter : an Institute of Physics Journal
|February 28, 2015
Summary
This review explores interfacial phenomena in complex oxides, focusing on perovskite manganites. Discoveries at these atomically sharp interfaces reveal novel electronic properties and phenomena.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Solid-State Chemistry
Background:
- Interfaces between dissimilar materials exhibit unique phenomena.
- Perovskite manganites are complex oxides with rich electronic properties.
- Atomically sharp and coherent interfaces are crucial for observing intrinsic phenomena.
Purpose of the Study:
- To review recent advances in understanding interfacial phenomena.
- To focus on phenomena intrinsic to the interface.
- To highlight research on perovskite manganite interfaces.
Main Methods:
- Literature review of recent advances.
- Analysis of phenomena at atomically sharp and coherent interfaces.
- Focus on experimental and theoretical studies of perovskite manganites.
Main Results:
- Interfaces between dissimilar materials host novel phenomena.
- Perovskite manganite interfaces serve as a platform for discovery.
- Intrinsic interfacial properties are key to understanding complex oxide behavior.
Conclusions:
- Interfacial phenomena are critical for novel material properties.
- Perovskite manganites offer unique opportunities for exploring emergent phenomena.
- Further research into atomically sharp interfaces will drive future discoveries.
Related Concept Videos
01:28Magnetostatic Boundary Conditions
1.9K
An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
1.9K
01:20Types of Semiconductors
1.9K
Intrinsic semiconductors are highly pure materials with no impurities. At absolute zero, these semiconductors behave as perfect insulators because all the valence electrons are bound, and the conduction band is empty, disallowing electrical conduction. The Fermi level is a concept used to describe the probability of occupancy of energy levels by electrons at thermal equilibrium. In intrinsic semiconductors, the Fermi level is positioned at the midpoint of the energy gap at absolute zero. When...
1.9K
01:31Ferromagnetism
3.6K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
3.6K
02:42Valence Bond Theory
11.9K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
11.9K
01:24Metal-Semiconductor Junctions
1.4K
The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
1.4K
01:06Interfacial Electrochemical Methods: Overview
1.1K
Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current...
1.1K