The research team at the National University of Singapore has developed a new method of controlling electrons that can confine electrons to devices made of atomic-thick materials. The research results led by Antonio Casto Nito, professor of the Advanced 2D Materials Center of the Faculty of Science, were published in the journal Nature.
Almost all modern technologies such as motors, light bulbs, and semiconductor chips control current through devices. Electrons are not only small but also fast moving and repelling each other. It is difficult for people to directly control the movement of electrons. To control the behavior of electrons, many semiconductor materials require doping chemicals that release or absorb electrons in the material and change the electron concentration to drive the current. However, doping chemicals have limitations and they can cause irreversible chemical changes in the material.
The research team encapsulated the two materials of atomic thickness, titanium selenide and boron nitride, and applied external electrons and magnetic fields to the combined material to act as a chemical dopant and accurately control the electrons. Behave and make it reversible. Among them, the thickness of the two materials is critical, the electrons are enclosed inside the two-dimensional material coating, and the electric and magnetic fields are unified.
Nito said: "We can make the material into a superconductor, and the electron movement in the entire material without any loss of energy or heat." Atomic thickness of two-dimensional superconducting materials has advantages over traditional superconductors, such as can be applied to smaller On a portable magnetic resonance imaging (MRI) instrument.
The technology, which was developed over two years, brings light to high-temperature superconductivity and other solid-state phenomena. The variety of materials to be tested greatly expands the possibilities of solid-state material science. However, current materials require ultra-low temperatures of minus 270 degrees Celsius to produce functionality. The research team will next develop high-temperature 2D superconducting materials to achieve exciting applications such as lossless electrical lines, MRI, and levitation trains.
Source: Science and Technology Daily
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