All-time favorites

Rating: 5 out of 5.

“A Molecular Beam Resonance Method with Separated Oscillating Fields”,
Physical Review 78 (6): 695–99

Norman F. Ramsey,
1950

Rating: 5 out of 5.

“Observation of Gravitationally Induced Quantum Interference”, Phys. Rev. Lett. 34 (23): 1472–74

R. Colella, A. W. Overhauser, & S. A. Werner,
1975

Rating: 5 out of 5.

“Apparent Weight of Photons”, Phys. Rev. Lett. 4 (7): 337–41

R. V. Pound & G. A. Rebka,
1960

Rating: 5 out of 5.

“Bloch oscillations of atoms, adiabatic rapid passage, and monokinetic atomic beams”, Phys. Rev. A 55 (4): 2989–3001

E. Peik, M. Ben Dahan, I. Bouchoule, Y. Castin, & C. Salomon
1997

Rating: 5 out of 5.

“Atomic interferometry using stimulated Raman transitions”,
Phys. Rev. Lett. (67) 181

M. Kasevich & S. Chu,
1991

Rating: 5 out of 5.

“A measurement of gravitational acceleration by dropping atoms”,
Nature (400) 849–852

A. Peters, K. Y. Chung, & S. Chu,
1999