Related Experiment Video
Updated: May 8, 2025
09:06
Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
8.0K
Adatom Engineering Magnetic Order in Superconductors: Applications to Altermagnetic Superconductivity
Lucas V Pupim1, Mathias S Scheurer1
1University of Stuttgart, Institute for Theoretical Physics III, 70550 Stuttgart, Germany.
Physical Review Letters
|April 25, 2025
Summary
Researchers theoretically engineered novel superconductors using adatom superlattices. These materials break time-reversal symmetry, creating unique orbital altermagnetic states with potential for new electronic properties.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Materials
Background:
- Unconventional superconductors exhibit complex electronic states.
- Adatom superlattices offer a platform for tailoring material properties.
- Breaking time-reversal symmetry is key to novel quantum phenomena.
Purpose of the Study:
- To theoretically investigate adatom superlattices on unconventional superconductors.
- To engineer novel pairing states with broken time-reversal symmetry.
- To explore emergent magnetic and electronic properties.
Main Methods:
- Theoretical study using a square-lattice Hubbard model.
- Modeling d-wave and s-wave superconductivity.
- Analysis of symmetry properties and electronic band structure.
Main Results:
- Stabilization of an "orbital altermagnetic superconductor" state.
- Observation of loop current patterns and orbital magnetic moments.
- Preservation of superlattice translations with fourfold rotational oddness.
- Nonzero Berry curvature quadrupole moment.
- Altermagnetic spin splitting and nontrivial spin textures with spin-orbit coupling.
Conclusions:
- Adatom superlattices can engineer exotic superconducting states.
- The proposed orbital altermagnetic superconductor exhibits unique symmetry properties.
- These findings open avenues for novel quantum devices and materials.
More Related Videos
08:55Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
8.4K
06:49Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates
Published on: April 12, 2019
7.5K
Related Concept Videos
01:28Types Of Superconductors
878
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...
878
01:31Ferromagnetism
2.3K
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...
2.3K
01:30Paramagnetism
2.4K
Paramagnets are materials with unpaired electrons that possess a finite magnetic moment. In the absence of a magnetic field, these moments are randomly oriented, and thus the net moment is zero. Under an external field, a torque acting on the moments tends to align them along the field's direction. However, the random thermal motion of electrons produces a torque opposite to the external field and tries to disorient the moments. These two competing effects align only a few moments along the...
2.4K
01:26Diamagnetism
2.3K
Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
2.3K
01:31Magnetic Susceptibility and Permeability
832
In linear magnetic materials, like paramagnets and diamagnets, magnetization is proportional to the magnetic field intensity. The constant of proportionality, a dimensionless number, is called magnetic susceptibility. The value of the susceptibility depends on the type of material.
When diamagnetic materials are placed under an external magnetic field, the moments opposite to the field are induced. Hence, the susceptibility for diamagnets has a minimal negative value of 10-5–10-6. Since...
When diamagnetic materials are placed under an external magnetic field, the moments opposite to the field are induced. Hence, the susceptibility for diamagnets has a minimal negative value of 10-5–10-6. Since...
832
01:24Superconductor
1.0K
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...
1.0K