Related Experiment Video
Updated: Jul 11, 2026
09:06
Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
Two-dimensional superconducting fluctuations in stripe-ordered La1.875Ba0.125CuO4.
Physical Review Letters
|October 13, 2007
Summary
Stripe order in lanthanum barium cuprate La(2-x)Ba(x)CuO(4) decouples CuO(2) planes, enabling two-dimensional (2D) superconductivity and enhanced critical temperature (Tc). This stripe order frustrates 3D superconducting phase order.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Superconductivity
Background:
- La(2-x)Ba(x)CuO(4) exhibits complex electronic phases, including stripe order and superconductivity.
- Spectroscopic observations reveal a d-wave-like gap in stripe-ordered samples.
Purpose of the Study:
- To analyze anisotropic transport and magnetization properties of stripe-ordered La(2-x)Ba(x)CuO(4) with x=1/8.
- To understand the interplay between stripe order and superconductivity.
Main Methods:
- Spectroscopic observations
- Anisotropic transport measurements
- Magnetization property analysis
Main Results:
- Spectroscopic data indicate a d-wave-like gap in stripe-ordered La(2-x)Ba(x)CuO(4) (x=1/8).
- Spin ordering correlates with electronic decoupling of CuO(2) planes.
- A transition to 2D fluctuating superconductivity and a 2D superconducting state below a Berezinskii-Kosterlitz-Thouless transition were observed.
Conclusions:
- Stripe order in La(2-x)Ba(x)CuO(4) frustrates 3D superconducting phase order.
- Stripe order is compatible with 2D superconductivity and an enhanced critical temperature (Tc).
- The findings suggest a mechanism for enhanced superconductivity in layered cuprates.
More Related Videos
Related Concept Videos
01:28Types Of Superconductors
A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
01:24Superconductor
A substance that reaches superconductivity, a state in which magnetic fields cannot penetrate, and there is no electrical resistance, is referred to as a superconductor. In 1911, Heike Kamerlingh Onnes of Leiden University, a Dutch physicist, observed a relation between the temperature and the resistance of the element mercury. The mercury sample was then cooled in liquid helium to study the linear dependence of resistance on temperature. It was observed that, as the temperature decreased, the...
01:31Ferromagnetism
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...
01:17Theory of Metallic Conduction
The conduction of free electrons inside a conductor is best described by quantum mechanics. However, a classical model makes predictions close to the results of quantum mechanics. It is called the theory of metallic conduction.
In this theory, Newton's second law of motion is used to determine the acceleration of an electron in the presence of an applied electric field. Then, its velocity is expressed via this acceleration.
An electron moves through the crystal, containing positive ions,...
In this theory, Newton's second law of motion is used to determine the acceleration of an electron in the presence of an applied electric field. Then, its velocity is expressed via this acceleration.
An electron moves through the crystal, containing positive ions,...
01:25Magnetic Field due to Moving Charges
A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
03:02Colors and Magnetism
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.