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Related Concept Videos

Angle of Twist: Problem Solving01:13

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An electric motor applies a torque of 700 N·m to an aluminum shaft, triggering a stable rotation. Two pulleys, B and C, are subjected to torques of 300 N·m and 400 N·m, respectively. The modulus of rigidity is provided as 25 GPa. With the knowledge of the length and diameter of each segment, the twist angle between the two pulleys can be computed. First, a section cut is made between pulleys B and C, and the cut cross-section is analyzed using a free-body diagram. Given that the torque...
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Consider a cylindrical shaft with a length denoted by L and a consistent cross-sectional radius referred to as r. This shaft undergoes a torque at the free end. The highest shearing strain within the shaft is directly proportional to the twist angle and the radial distance from the shaft axis. When the shaft behaves elastically, this shearing strain can be articulated using variables such as the applied torque, radial distance, the polar moment of inertia, and the modulus of rigidity. By...
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Rashba-Edelstein effect in altermagnetic twisted bilayers.

Dan Wang1,2, Mengdong He1,2, Linghong Liu1,2

  • 1School of Electronic Information and Physics, Central South University of Forestry and Technology, Changsha 410004, People's Republic of China.

Nanotechnology
|January 28, 2026
PubMed
Summary
This summary is machine-generated.

Altermagnetic materials can achieve efficient charge-to-spin conversion via the Rashba-Edelstein effect (REE) by manipulating symmetry. This finding offers new possibilities for spintronic devices, even with weak spin-orbit coupling.

Keywords:
Rashba–Edelstein effectaltermagnetismmagnetoelectric response tensortwisted bilayer system

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Spintronics

Background:

  • Altermagnetic materials exhibit unique properties and are a focus of current research.
  • The Rashba-Edelstein effect (REE) is key for charge-to-spin conversion.

Purpose of the Study:

  • To investigate the relationship between symmetry and the REE in altermagnetic materials.
  • To explore REE in weak spin-orbit coupling (SOC) materials.

Main Methods:

  • Developed a program to quantify REE intensity.
  • Calculated REE in altermagnetic materials with broken symmetry (via twisting).
  • Compared REE in weak-SOC altermagnetic materials and strong-SOC transition metal dichalcogenides (TMDs).

Main Results:

  • Efficient REE was achieved in weak-SOC altermagnetic materials by regulating symmetry.
  • Symmetry breaking through twisting was a key factor.
  • Demonstrated that strong SOC is not essential for efficient REE.

Conclusions:

  • Efficient REE is attainable in altermagnetic materials through symmetry control, independent of strong SOC.
  • Provides a new avenue for designing next-generation spintronic devices.
  • Challenges the conventional understanding of REE requirements.