Researchers Move 10,000 Atoms in Minutes at Room Temperature

After 37 years since the first demonstration of single-atom movement, researchers have achieved a significant leap in scalability, now capable of repositioning tens of thousands of individual atoms within a material in a matter of minutes. A team at MIT, the Department of Energy’s Oak Ridge National Laboratory, and other institutions developed a technique that operates at room temperature, eliminating the need for high-vacuum and ultracold conditions that previously constrained this field. The approach utilizes algorithms to direct an electron beam with picometer precision, driving atomic motions within a material’s structure. “The results demonstrate the ability to deterministically move atoms repeatedly within a material’s 3D atomic lattice,” says MIT Research Scientist Julian Klein, who directed the project, adding that the method allows for the creation of artificial states of matter with potential applications in sensing, optics, and magnetic technologies.

Algorithms Direct Electron Beam for Picometer-Scale Atomic Positioning

A precision of just a few picometers, one trillionth of a meter, now guides the movement of individual atoms within materials, opening new avenues for quantum engineering. This advancement builds upon the initial demonstration of single-atom manipulation 37 years ago, finally reaching a stage where scalability appears within reach. The core of this innovation lies in a sophisticated set of algorithms that direct an electron beam with extraordinary accuracy. Unlike prior methods restricted to two-dimensional surface movements, this approach enables manipulation within a material’s three-dimensional atomic lattice. The team utilized high-performance microscopes at Oak Ridge National Laboratory, employing algorithms designed to rapidly pinpoint the beam’s location while minimizing potential damage to the crystalline structure. This precise control allows for the creation of defects, atom-sized vacancies and interstitial atoms, with tailored quantum properties.

In a recent Nature paper, the researchers detailed how they generated more than 40,000 quantum defects in a crystalline semiconductor material in under 40 minutes. This speed represents a significant leap forward; the 1989 demonstration of arranging 35 atoms to spell “IBM” using a scanning tunneling microscope took hours, if not days. “It’s like a photocopier that can create columns of identical atomic defects,” says Frances Ross, MIT’s TDK Professor in Materials Science and Engineering. The oscillating path of the electron beam effectively “swipes” columns of atoms to new locations, similar to a touchscreen gesture, within a crystal of chromium sulfide bromide just 13 nanometers thick. “We developed algorithms that allow us to quickly obtain information on where the beam is in the material,” Klein adds, emphasizing the years of work dedicated to optimizing the process and minimizing electron usage.

This technique isn’t merely about moving atoms; it’s about designing matter with unprecedented control, potentially simulating the electronic structure of molecules within a solid material. Ross explains that each of these defects has certain ways to interact with its neighbors, and if they are placed in a pattern, it could essentially simulate the interactions between the electrons within a molecule. The researchers believe this approach will facilitate the development of stable quantum devices and unlock new insights into quantum behavior, potentially leading to advancements in quantum computing and beyond.

3D Atomic Lattice Manipulation in Chromium Sulfide Bromide

The ability to manipulate matter at the atomic scale has long been a goal of materials science, but practical, scalable methods have remained elusive. While scientists first demonstrated single-atom movement 37 years ago, progress toward routinely engineering materials atom by atom has been incremental. Current techniques largely confine manipulation to two dimensions and often demand extreme conditions; most require painstakingly slow processes and high-vacuum, ultracold laboratory environments. This breakthrough centers on a sophisticated algorithmic approach that directs an electron beam with picometer precision. The team demonstrated the capability using chromium sulfide bromide, a stable semiconductor just 13 nanometers thick, creating more than 40,000 quantum defects in approximately 40 minutes. This speed represents a significant advance over the hours, or even days, required to position just a few atoms using earlier technologies like scanning tunneling microscopy, famously used by IBM researchers to spell out the company’s name with atoms.

The innovation lies in the algorithms developed to control the electron beam. This process isn’t merely about creating defects; it’s about engineering materials with tailored quantum properties. “It’s especially useful because you can move a few atoms to form defects, and do it again and again to build atomic arrangements in three dimensions that have tunable functions in a system that is more robust because the defects exist beneath the surface.” The potential applications span quantum computing, dense magnetic memory, and atomic-scale logic devices, offering a pathway toward stable, programmable quantum systems.

Creating and Scaling 40,000 Quantum Defects in Minutes

Researchers are increasingly focused on manipulating matter at the atomic level to engineer novel quantum properties, and a team led by Julian Klein at MIT and Oak Ridge National Laboratory has achieved a significant advance in scalability. This beam doesn’t simply nudge individual atoms; it drives the movement of tens of thousands of individual atoms, effectively “swiping” them to new locations within the material’s structure. The team utilized a crystalline semiconductor material, chromium sulfide bromide, approximately 13 nanometers thick, to demonstrate the process. “You want to place the atoms close to each other so they can interact, and you want to have a lot of them arranged as you’d like—thousands or millions of atoms in specific locations you’ve chosen.” This ability to create a high density of defects is crucial because these imperfections are often the source of unique quantum behaviors. Klein further emphasizes the potential for creating “entirely artificial states of matter not found in nature with a wide range of potential applications, including sensing, optical, and magnetic technologies.” The technique’s success is also linked to the unique electronic structure of chromium within the semiconductor, though the team is actively investigating its applicability to other materials.

Advancing Atomic Control Beyond Surface Limitations

The ability to engineer materials at the atomic level is rapidly transitioning from curiosity toward practical application, with a newly refined technique overcoming longstanding limitations of previous methods. For decades, manipulating individual atoms promised customized material properties and a deeper understanding of quantum phenomena, but progress has been hampered by slow processes and restrictive environmental requirements. This advancement addresses a critical constraint of earlier atomic manipulation techniques, which were largely confined to two-dimensional surface movements. The technique doesn’t simply arrange atoms; it enables the creation of controlled defects, vacancies or misplaced atoms, within the material’s structure, opening doors to entirely artificial states of matter. Described in a recent Nature paper, the process involves scanning an electron beam across the material, using carefully designed oscillating paths to nudge tens of thousands of individual atoms to new locations. “This is a way of accessing physical phenomena that involve a lot of atoms placed in a certain specified arrangement, and can’t be done by self-assembly,” Ross concludes.