Switching Crystallographic Chirality in Ba(TiO)Cu₄(PO₄)₄ by Laser Irradiation

Area of Science:

• Materials Science
• Crystallography
• Solid State Physics

Background:

• Switching crystallographic chirality in inorganic materials is challenging due to the lack of a direct conjugate field.
• Chiral domain manipulation is crucial for developing advanced functional materials.
• Ba(TiO)Cu4(PO4)4 exhibits a room-temperature chiral structure and a chiral-achiral phase transition at 710 °C.

Purpose of the Study:

• To demonstrate a method for switching crystallographic chirality in an inorganic crystalline material.
• To investigate the manipulation of chiral domain boundaries using laser irradiation.
• To provide a novel approach for controlling chirality in inorganic crystalline materials.

Main Methods:

• Utilized laser irradiation at a wavelength of strong optical absorption for Ba(TiO)Cu4(PO4)4 to induce local heating.
• Manipulated chiral domain boundaries by controlling laser beam scanning on the sample surface.
• Employed optical rotation measurements to reveal reconstructions of chiral domain boundaries.

Main Results:

• Demonstrated successful switching of crystallographic chirality in Ba(TiO)Cu4(PO4)4 via laser-induced domain boundary reconstruction.
• Observed minimization of energetically unstable domain boundaries during the reconstruction process.
• Successfully manipulated chiral domain patterns by scanning the laser beam, indicating precise control.

Conclusions:

• Laser irradiation provides an effective means to control and switch crystallographic chirality in inorganic materials.
• The method leverages local heating to reconstruct and manipulate chiral domain boundaries.
• This work presents a unique and promising approach for controlling chirality in functional inorganic crystalline materials.