Phonon Masers and the Phonon Bottleneck

The Maser—New Type of Microwave Amplifier, Frequency Standard, and Spectrometer

J. P. Gordon, H. J. Zeiger, C. H. Townes · Physical Review · 1955 · 662 citations · Full text

Engineering, Electrical Engineering, Instrumentation +16

Paramagnetic Relaxation and the Equilibrium of Lattice Oscillators

J. H. Van Vleck · Physical Review · 1941 · 189 citations

Natural Sciences, Physics, Condensed Matter Physics +14

Paramagnetic Centers as Detectors of Ultrasonic Radiation at Microwave Frequencies

C. Kittel · Physical Review Letters · 1958 · 16 citations

Natural Sciences, Physics, Radiation Detection +13