22 citations · 84 across the 12 of their papers we have counts for
12 papers
Dynamic nuclear polarization and ESR hole burning in As doped silicon
J. Jarvinen, D. Zvezdov, J. Ahokas +6
We present an experimental study of the Dynamic Nuclear Polarization (DNP) of \si{} nuclei in silicon crystals of natural abundance doped with As in the temperature range 0.1-1 K a…
Searching for Magnetostatic Modes in Spin-Polarized Atomic Hydrogen
Lauri Lehtonen, Otto Vainio, Janne Ahokas +4
We consider a possibility of the magnetostatic type spin waves driven by a long-range magnetic dipole interactions, to account for the peaks in the ESR spectra observed in our prev…
Spin Waves in Quantum Gases --- The Quality Factor of the Identical Spin Rotation Effect
L. Lehtonen, O. Vainio, J. Ahokas +6
Our recent experimental work on electron spin waves in atomic hydrogen gas has prompted a revisit of the theory of the Identical Spin Rotation Effect (ISRE). A key characteristic d…
Electron spin resonance study of atomic hydrogen stabilized in solid neon below 1K
Sergey Sheludiakov, Janne Ahokas, Jarno Jarvinen +4
We report on an electron spin resonance study of atomic hydrogen stabilized in a solid Ne matrices carried out at a high field of 4.6 T and temperatures below 1 K. The films of Ne,…
Dynamic Polarization and Relaxation of 75As Nuclei in Silicon at High Magnetic Field and Low Temperature
J. Järvinen, J. Ahokas, S. Sheludyakov +5
We present the results of experiments on dynamic nuclear polarization and relaxation of 75As in silicon crystals. Experiments are performed in strong magnetic fields of 4.6 T and t…
Dynamic nuclear polarization and relaxation of H and D atoms in solid mixtures of hydrogen isotopes
S. Sheludiakov, J. Ahokas, J. Järvinen +5
We report on a study of Dynamic Nuclear Polarization and electron and nuclear spin relaxation of atomic hydrogen and deuterium in solid molecular matrices of H, D, and…
ESR study of atomic hydrogen and tritium in solid T and T:H matrices below 1K
S. Sheludiakov, J. Ahokas, J. Järvinen +6
We report on the first ESR study of atomic hydrogen and tritium stabilized in a solid T and T:H matrices down to 70mK. The concentrations of T atoms in pure T…
Identical Spin Rotation Effect and Electron Spin Waves in Quantum Gas of Atomic Hydrogen
L. Lehtonen, O. Vainio, J. Ahokas +7
We present an experimental study of electron spin waves in atomic hydrogen gas compressed to high densities of cm at temperatures ranging from 0.26 t…
Tunneling chemical exchange reaction in solid HD and D at temperatures below 1K
S. Sheludiakov, J. Ahokas, J. Järvinen +6
We report on a study of the exchange tunneling reaction D+HDD+H in a pure solid HD matrix and in a D matrix with 0.23 HD admixture at temperatures betw…
Bose-Einstein condensation of magnons in atomic hydrogen gas
O. Vainio, J. Ahokas, J. Järvinen +8
We report on experimental observation of BEC-like behaviour of quantized electron spin waves (magnons) in a dense gas of spin polarized atomic hydrogen. The magnons are trapped and…
Microscopic control of Si nuclear spins near phosphorus donors in silicon
J. Järvinen, D. Zvezdov, J. Ahokas +11
We demonstrate an efficient control of Si nuclear spin orientation for specific lattice sites near P donors in silicon crystals at temperatures below 1 K and in high…
Efficient Dynamic Polarization of Phosphorus Nuclei in Silicon in Strong Magnetic Fields and Low Temperatures
J. Järvinen, D. Zvezdov, J. Ahokas +11
We demonstrate that the dynamic nuclear polarization (DNP) of phosphorus donors in silicon can be very effective in a magnetic field of 4.6 T and at temperatures below 1 K. The DNP…