A team of scientists has achieved something that many experts once believed was impossible.
After nearly 20 years of research, they have created a new material that combines two important properties that rarely exist together.
The breakthrough could lead to better wireless communications, radar systems, satellites, quantum technologies and faster internet connections.
The discovery was published in the journal Nature Electronics and is being described as a major milestone in microwave electronics.
The story began in 2009 when Nate Orloff, then a graduate student at the University of Maryland, was studying measurements from a new experimental material late one night.
As he looked at the results on his computer screen, he realized he was seeing something unexpected.
“I jumped out of my chair and shouted ‘Eureka!'” Orloff later recalled. In his excitement, he even knocked his computer off the desk.
For more than two decades, scientists had faced a frustrating problem. Materials used in microwave electronics could usually offer one of two valuable features. They could be “tunable,” meaning their electrical properties could be changed by applying a voltage, or they could have very low energy loss, meaning they wasted very little energy as heat. However, no material seemed able to do both well at the same time.
Having both qualities would allow electronic components to control microwave signals more accurately while using less energy. This is important for technologies such as wireless networks, mobile communications, radar systems and satellites.
While most research teams focused on one popular material called barium strontium titanate, a group led by Cornell University researcher Darrell Schlom took a different path. They studied unusual layered crystals called Ruddlesden-Popper thin films. Many scientists believed these materials were a dead end because their crystal structure suggested they could never be tuned effectively.
Despite the criticism, the team continued their work. Orloff’s surprising measurements in 2009 hinted that one version of the material could actually be tunable. Unfortunately, it only worked in a way that was not practical for real electronic devices.
Rather than giving up, the researchers asked a bold question: Could they redesign the material itself?
Working with scientists from several universities and the U.S. National Institute of Standards and Technology (NIST), the team carefully changed the material’s atomic structure by inserting thin rock-salt layers. This altered its internal symmetry, allowing the material to keep its extremely low energy loss while becoming tunable in a design suitable for practical electronics.
Even then, the researchers faced another challenge. Measuring the material at the high microwave frequencies used in modern communications proved extremely difficult. The testing equipment itself distorted the signals, making the results almost impossible to understand.
The breakthrough came after the team developed a new measuring method. By first measuring a control sample made only of metal, they were able to remove the unwanted interference from their data and reveal the material’s true performance.
The final results confirmed what the researchers had hoped for over many years. The new material successfully combined strong electrical tunability with exceptionally low microwave energy loss in a form that could be used in real devices.
The breakthrough could eventually improve tunable filters, microwave resonators, electro-optic modulators and quantum information systems. Electro-optic modulators are especially important because they convert electrical signals into light signals, forming a key part of the fiber-optic networks that power today’s internet.
Researchers also found that the material performs very consistently from one sample to another. This reliability is essential for large-scale manufacturing, where companies need every device to work the same way.
The scientists believe their discovery not only solves a decades-old challenge but also opens the door to designing an entirely new generation of high-performance electronic materials for future communication technologies.
