Optical atomic clocks with suppressed blackbody-radiation shift

We study a wide range of neutral atoms and ions suitable for ultraprecise atomic optical clocks with naturally suppressed blackbody-radiation shift of clock transition frequency. Calculations show that scalar polarizabilities of clock states cancel each other for at least one order of magnitude for the considered systems. Results for calculations of frequencies, quadrupole moments of the states, clock transition amplitudes, and natural widths of upper clock states are presented.