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Controlling quantum states in particular person molecules with two-dimensional ferroelectrics


Researchers used electrical energy to manage the inner states of molecules. Credit: Jose Lado/Aalto University

Controlling the inner states of quantum methods is among the greatest challenges in quantum supplies. At the deepest stage, single molecules can show totally different quantum states, even whereas possessing the identical variety of electrons. These states are related to totally different electron configurations, which might result in dramatically totally different properties.


The functionality of controlling the digital configuration of may result in main developments in each elementary science and expertise. On the one hand, controlling the inner states of molecules might permit for the event of recent synthetic supplies with unique properties. On the opposite hand, it may additionally make doable the last word miniaturization of classical pc recollections, with the 2 configurations may make it doable to encode a 0 and a 1 in a classical reminiscence unit on the . However, controlling the inner states of molecules nonetheless stays a problem, and real looking, scalable methods for overcoming it haven’t been proposed.

Tuning inner states by making use of voltage

In a latest experimental breakthrough researchers from Aalto University and the University of Jyväskylä demonstrated the power to manage the quantum states of particular person molecules with an electrically controllable substrate. Their experiment confirmed how a particular two-dimensional materials, often called SnTe, supplies the instrumental technique wanted to manage molecular states.

The mechanism demonstrated by the researchers is predicated on the power of a substrate to tune the inner state of molecules on account of inner electrical fields. This mechanism, often called ferroelectric molecular switching, allows researchers to manage particular person molecules merely by making use of a voltage to the substrate. The technique depends on the robust tunability of SnTe by exterior voltages, which stems from a singular quantum property often called ferroelectricity.

The analysis group concerned the teams of Professors Peter Liljeroth, Adam Foster, and Jose Lado from Aalto University, and the group was led by Professor Shawulienu Kezilebieke from the University of Jyväskylä.

“Our results demonstrate how we can control individual molecules using electrically-tunable two-dimensional materials. From a practical point of view, two-dimensional ferroelectrics have been instrumental, as its ultraclean interface allows realizing this strategy of quantum control. These experiments put forward a strategy to engineer quantum states at the molecular level, opening exciting possibilities in artificial materials and single-molecule electronics,” Kezilebieke says.

“In our experiments, we demonstrated how two-dimensional ferroelectrics allow us to realize electrically switchable quantum states. Controlling quantum states electrically is a major milestone in , and here we demonstrated one strategy for doing it at the deepest level of individual molecules,” says Ph.D. researcher Mohammad Amini, the primary creator of the research.

The quantum management of through substrate results opens up new prospects in quantum matter, together with engineering synthetic molecular supplies with switchable states. The analysis was just lately printed in Advanced Materials.

More info:
Mohammad Amini et al, Control of Molecular Orbital Ordering Using a van der Waals Monolayer Ferroelectric, Advanced Materials (2022). DOI: 10.1002/adma.202206456

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Aalto University

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Controlling quantum states in particular person molecules with two-dimensional ferroelectrics (2023, January 9)
retrieved 9 January 2023
from https://phys.org/news/2023-01-quantum-states-individual-molecules-two-dimensional.html

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