11 papers
Wide-field NV magnetometry under simultaneous high-pressure and high-temperature conditions
Masahiro Ohkuma, Eikichi Kimura, Shumpei Ohyama +7
We demonstrate wide-field optically detected magnetic resonance (ODMR) under simultaneous high-pressure and high-temperature conditions using nitrogen-vacancy (NV) centers. Althoug…
Probing the Meissner effect in single crystals of via wide-field quantum microscopy under high pressure
Masahiro Ohkuma, Ryo Matsumoto, Shintaro Adachi +5
We investigated the pressure dependence of the superconducting transition temperature () in optimally doped BiSrCaCuO (Bi-2223) single crystals…
Optically detected magnetic resonance of nitrogen-vacancy centers in microdiamonds inside nanopolycrystalline diamond anvil cell
Masahiro Ohkuma, Keigo Arai, Kenji Ohta +4
We demonstrated optically detected magnetic resonance (ODMR) of nitrogen-vacancy (NV) centers in microdiamonds inside a diamond anvil cell pressurized with nanopolycrystalline diam…
Coherent control of solid-state defect spins via patterned boron-doped diamond circuit
Masahiro Ohkuma, Eikichi Kimura, Eunsang Lee +8
Monolithic integration, which refers to the incorporation of all device functionalities within a single material, shows significant potential for creating scalable solid-state quan…
Enhancement of superconductivity on thin film of Sn under high pressure
Misaki Sasaki, Masahiro Ohkuma, Ryo Matsumoto +4
We investigated the pressure effects of a superconductivity on thin films of Sn. Elemental superconductor Sn with a body-centered tetragonal structure, -Sn, exhibits supercondu…
High-pressure synthesis of bilayer nickelate SrNiOCl with tetragonal crystal structure
Kazuki Yamane, Yoshitaka Matsushita, Shintaro Adachi +5
A novel oxychloride, SrNiOCl, was synthesized for the first time under high pressure of 10 GPa at 1400 C, motivated by a theoretical prediction of…