Physical Review Letters

Effect of Ferromagnetic Spin Correlations on Superconductivity

N. F. Berk and J. R. Schrieffer

Phys. Rev. Lett. 17, 433 (1966) - Published 22 August, 1966

Theory of Polaron-Induced Anomalies in the Interband Magneto-Optical Absorption of InSb

Robert M. White and Calvin S. Koonce

Phys. Rev. Lett. 17, 436 (1966) - Published 22 August, 1966

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We propose a coupled-mode theory which explains the behavior of the infrared absorption in a semiconductor in a magnetic field in the region where the cyclotron frequency is equal to the optical phonon frequency. A technique for formulating the problem in terms of Green's functions is also developed.

Anomalous Dependence of the Superconducting Transition Temperature on Paramagnetic Impurities

K. H. Bennemann

Phys. Rev. Lett. 17, 438 (1966) - Published 22 August, 1966

Singularities in the Universe

S. W. Hawking

Phys. Rev. Lett. 17, 444 (1966) - Published 22 August, 1966

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Singularities in Closed Universes

R. P. Geroch

Phys. Rev. Lett. 17, 445 (1966) - Published 22 August, 1966

Extended Source of Energetic Cosmic X Rays

Elihu Boldt, Frank B. McDonald, Guenter Riegler, and Peter Serlemitsos

Phys. Rev. Lett. 17, 447 (1966) - Published 22 August, 1966

Interferometric Study of Cosmic Line Emission at OH Frequencies

A. E. E. Rogers, J. M. Moran, P. P. Crowther, B. F. Burke, M. L. Meeks, J. A. Ball, and G. M. Hyde

Phys. Rev. Lett. 17, 450 (1966) - Published 22 August, 1966

Diameters and Positions of Three Sources of 18-cm OH Emission

D. D. Cudaback, R. B. Read, and G. W. Rougoor

Phys. Rev. Lett. 17, 452 (1966) - Published 22 August, 1966

Radio Propagation in the Solar Gravitational Field

D. O. Muhleman and I. D. Johnston

Phys. Rev. Lett. 17, 455 (1966) - Published 22 August, 1966

$π^{+} p$ Elastic Differential Cross Sections from 2.3 to 4.0 GeV/c

C. T. Coffin, N. Dikmen, L. Ettlinger, D. Meyer, A. Saulys, K. Terwilliger, and D. Williams

Phys. Rev. Lett. 17, 458 (1966) - Published 22 August, 1966

Electron-Impact Excitation of $n = 2$ States in He

P. G. Burke, J. W. Cooper, and S. Ormonde

Phys. Rev. Lett. 17, 345 (1966) - Published 15 August, 1966

Interference Beats in Pulse-Stimulated Cyclotron Radiation

J. M. Wachtel and J. L. Hirshfield

Phys. Rev. Lett. 17, 348 (1966) - Published 15 August, 1966

Effect of Surface Patch Fields on Field-Emission Work-Function Determinations

Russell D. Young and Howard E. Clark

Phys. Rev. Lett. 17, 351 (1966) - Published 15 August, 1966

Nuclear Spin-Lattice Relaxation of ${}^{53}{Cr}$ in the Ordered Magnetic Insulator Cr ${Cl}_{3}$

Albert Narath and A. T. Fromhold, Jr.

Phys. Rev. Lett. 17, 354 (1966) - Published 15 August, 1966

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Nuclear Spin-Lattice Relaxation of $F^{19}$ in Antiferromagnetic Mn $F_{2}$

N. Kaplan, R. Loudon, V. Jaccarino, H. J. Guggenheim, D. Beeman, and P. A. Pincus

Phys. Rev. Lett. 17, 357 (1966) - Published 15 August, 1966

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The temperature and angular variations of $\frac{1}{T_{1}}$ for the $F^{19}$ nucleus are shown to be in excellent agreement with theoretical predictions for a two-magnon Raman-scattering relaxation mechanism via the transferred hyperfine interaction. The experiments clearly show the effect of the magnon energy gap on the relaxation rates.

Spatial Coherence of Light Scattered from Liquids

F. Gori and D. Sette

Phys. Rev. Lett. 17, 361 (1966) - Published 15 August, 1966

Pressure Dependence of the Radius of the Negative Ion in Helium II

B. E. Springett and R. J. Donnelly

Phys. Rev. Lett. 17, 364 (1966) - Published 15 August, 1966

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Thermal and Magnetic Properties of Dilute Solutions of ${He}^{3}$ in ${He}^{4}$ at Low Temperatures

A. C. Anderson, D. O. Edwards, W. R. Roach, R. E. Sarwinski, and J. C. Wheatley

Phys. Rev. Lett. 17, 367 (1966) - Published 15 August, 1966

Interactions Between ${He}^{3}$ Atoms in Dilute Solutions of ${He}^{3}$ in Superfluid ${He}^{4}$

J. Bardeen, G. Baym, and D. Pines

Phys. Rev. Lett. 17, 372 (1966) - Published 15 August, 1966

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The magnitude, sign, and momentum dependence of the effective interaction between ${He}^{3}$ atoms in superfluid ${He}^{4}$ are derived from the experimental data. Calculations of the Fermi-liquid parameters for the normal state of ${He}^{3}$ in solution yield results in agreement with experiment; the temperature for a superfluid transition associated with the ${He}^{3}$ is estimated to be ∼2× $10^{- 6}$ °K.

Power Laws Near the Curie Point of Yttrium Iron Garnet

Elmer E. Anderson

Phys. Rev. Lett. 17, 375 (1966) - Published 15 August, 1966

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Effect of Ferromagnetic Spin Correlations on Superconductivity

Theory of Polaron-Induced Anomalies in the Interband Magneto-Optical Absorption of InSb

Anomalous Dependence of the Superconducting Transition Temperature on Paramagnetic Impurities

Singularities in the Universe

Singularities in Closed Universes

Extended Source of Energetic Cosmic X Rays

Interferometric Study of Cosmic Line Emission at OH Frequencies

Diameters and Positions of Three Sources of 18-cm OH Emission

Radio Propagation in the Solar Gravitational Field

$π^{+} p$ Elastic Differential Cross Sections from 2.3 to 4.0 GeV/c

Electron-Impact Excitation of $n = 2$ States in He

Interference Beats in Pulse-Stimulated Cyclotron Radiation

Effect of Surface Patch Fields on Field-Emission Work-Function Determinations

Nuclear Spin-Lattice Relaxation of ${}^{53}{Cr}$ in the Ordered Magnetic Insulator Cr ${Cl}_{3}$

Nuclear Spin-Lattice Relaxation of $F^{19}$ in Antiferromagnetic Mn $F_{2}$

Spatial Coherence of Light Scattered from Liquids

Pressure Dependence of the Radius of the Negative Ion in Helium II

Thermal and Magnetic Properties of Dilute Solutions of ${He}^{3}$ in ${He}^{4}$ at Low Temperatures

Interactions Between ${He}^{3}$ Atoms in Dilute Solutions of ${He}^{3}$ in Superfluid ${He}^{4}$

Power Laws Near the Curie Point of Yttrium Iron Garnet

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