The Groundbreaking Discovery of Chiral Interface States in Quantum Materials

Researchers at Lawrence Berkeley National Laboratory (Berkeley Lab) have made a significant breakthrough in the field of quantum materials by visualizing and demonstrating electrical control of chiral interface states. This phenomenon has the potential to revolutionize quantum computing and energy-efficient electronics.

Chiral interface states are unique conducting channels that allow electrons to flow in only one direction, eliminating energy-wasting electrical resistance. These states are crucial for advancing quantum computing and other quantum information system applications.

Experimental Procedure

The research team at Berkeley Lab and UC Berkeley utilized a device called twisted monolayer-bilayer graphene to fabricate the chiral interface states. By using a scanning tunneling microscope (STM), they were able to detect and visualize the wavefunction of these states in atomic detail.

One of the most significant findings of the study was the ability to control and manipulate the chiral interface states. The researchers demonstrated that by modulating the voltage on a gate electrode, they could move the chiral interface state across the sample. Additionally, they showed that a voltage pulse from an STM probe could write, erase, and rewrite the chiral interface states.

The discovery of chiral interface states opens up a wide range of possibilities for future applications. Researchers believe that tunable networks of electron channels could lead to energy-efficient microelectronics and low-power magnetic memory devices. Moreover, the exotic electron behaviors in quantum anomalous Hall (QAH) insulators could be utilized for quantum computation.

The research conducted by the international team has provided valuable insights into the world of quantum materials. The ability to visualize and control chiral interface states represents a significant step forward in the field of quantum information systems. As researchers continue to explore the potential applications of this discovery, the future of quantum computing looks brighter than ever.

Science

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