Related Experiment Video
Updated: Feb 1, 2026
09:37
Preparation of Fungal and Plant Materials for Structural Elucidation Using Dynamic Nuclear Polarization Solid-State NMR
Published on: February 12, 2019
7.9K
Spontaneous Twirls and Structural Frustration in Moiré Materials
Jingtian Shi1, Gaurav Chaudhary2, Allan H MacDonald3
1Argonne National Laboratory, Materials Science Division, Lemont, Illinois 60439, USA.
Physical Review Letters
|January 30, 2026
Summary
Structural twirls in moiré materials exhibit staggered patterns, behaving like antiferromagnets. This chirality leads to frustration and hysteresis in triangular moiré systems, with ordering above room temperature.
Area of Science:
- Condensed matter physics
- Materials science
Background:
- Moiré materials exhibit complex domain wall networks.
- Spontaneous formation of structural twirls is observed in these systems.
Purpose of the Study:
- To investigate the behavior of twirl chiralities in moiré heterobilayers.
- To understand the implications of twirl ordering in triangular moiré systems.
Main Methods:
- Theoretical modeling using antiferromagnetic lattice $\phi^{4}$ theories.
- Analysis of twirl chirality configurations and their patterns.
Main Results:
- Neighboring twirl chiralities in heterobilayers tend to antialign, forming staggered patterns.
- Triangular moiré systems exhibit frustration in twirl chirality due to this ordering.
- Hysteresis is observed with respect to twist angle variations.
Conclusions:
- Twirl ordering in moiré materials can be described by established theoretical frameworks.
- Frustration and hysteresis are key features in triangular moiré systems.
- Twirl ordering temperatures are predicted to be around 1000 K, with freezing below room temperature.
More Related Videos
Related Concept Videos
02:21Spontaneity
29.8K
A spontaneous process is one that occurs naturally under certain conditions. A nonspontaneous process, on the other hand, will not take place unless it is “driven” by the continual input of energy from an external source. Processes have a natural tendency to occur in one direction under a given set of conditions. Water will naturally flow downhill (spontaneous process), but uphill flow (nonspontaneous process) requires outside intervention such as the use of a pump. Iron exposed to...
29.8K
01:20Frustration and Conflict: Approach-Approach, Approach-Avoidance
529
Frustration occurs when people are obstructed or prevented from achieving a desired goal or fulfilling a perceived need. For example, when someone's input is ignored in a discussion, it can lead to feelings of frustration. Conflict, however, arises from opposing interests, goals, or actions. Conflicts can take various forms based on the nature of these opposing desires or goals.
One common type of conflict is the Approach–Approach Conflict. In this case, a person faces two desirable...
One common type of conflict is the Approach–Approach Conflict. In this case, a person faces two desirable...
529
01:30Spontaneous and Induced Mutations
2.3K
Spontaneous mutations arise infrequently during DNA replication due to errors in the process. A key factor behind these errors is tautomeric shifts in nitrogenous bases, where bases transition from keto to enol forms or amino to imino forms. This shift can alter base-pairing rules, leading to mutations. Additionally, reactive oxygen species (ROS) arising from aerobic metabolism can damage DNA, resulting in depurination (loss of a purine base) or depyrimidination (loss of a pyrimidine base).
2.3K
01:14Frustration and Conflict: Avoidance-Avoidance, Double-Approach Avoidance
672
Avoidance-avoidance conflict refers to a psychological situation where a person must choose between two or more unpleasant alternatives. These conflicts are particularly stressful because neither option is desirable. This dilemma is often expressed in sayings like "caught between a rock and a hard place" or "between the devil and the deep blue sea." For instance, individuals who fear dental procedures may find themselves torn between enduring a painful toothache or facing the...
672
01:19Members Made of Elastoplastic Material
399
The behavior of elastoplastic materials under bending stresses, particularly in structural members with rectangular cross-sections, is crucial for predicting material responses and understanding failure modes. Initially, when a bending moment is applied, the stress distribution across the section follows Hooke's Law and is linear and elastic. This distribution means the stress increases from the neutral axis to the maximum at the outer fibers, up to the elastic limit.
As the bending moment...
As the bending moment...
399
01:20Genetic Material
3.7K
Within the human body, a complex and detailed system of trillions of cells works in unison to sustain life. Each cell houses a nucleus, which contains 46 chromosomes divided into 23 pairs. Chromosomes are highly coiled structures made of the genetic material DNA. These chromosomes are essential carriers of genetic information, with half inherited from the mother through her egg and the other half from the father's sperm, combining to create the unique genetic makeup of an individual.
3.7K