Researchers at Oak Ridge National Laboratory have developed a new method to manipulate a wide range of materials and their behavior using only a handful of helium ions.
The teamâ€™s technique, published in Physical Review Letters, advances the understanding and use of complex oxide materials that boast unusual properties such as superconductivity and colossal magnetoresistance but are notoriously difficult to control.
For the first time, ORNL researchers have discovered a simple way to control the elongation of a crystalline material along a single direction without changing the length along the other directions or damaging the crystalline structure. This is accomplished by adding a few helium ions into a complex oxide material and provides a never before possible level of control over magnetic and electronic properties.
â€œBy putting a little helium into the material, weâ€™re able to control strain along a single axis,â€ said ORNLâ€™s Zac Ward, who led the teamâ€™s study. â€œThis type of control wasnâ€™t possible before, and it allows you to tune material properties with a finesse that we havenâ€™t previously had access to.â€ [Read more…]