Volume 72, Issue 21

23 May 1994

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LETTERS

General Physics

Nonlinear interaction of traveling waves of nonintegrable equations

A. S. Fokas and Q. M. Liu

Phys. Rev. Lett. 72, 3293 (1994) - Published 23 May, 1994

Gravitation and Astrophysics

Colliding black holes: The close limit

Richard H. Price and Jorge Pullin

Phys. Rev. Lett. 72, 3297 (1994) - Published 23 May, 1994

Light deflection in perturbed Friedmann universes

Ruth Durrer

Phys. Rev. Lett. 72, 3301 (1994) - Published 23 May, 1994

Eternal inflation and the initial singularity

Arvind Borde and Alexander Vilenkin

Phys. Rev. Lett. 72, 3305 (1994) - Published 23 May, 1994

Refined big bang nucleosynthesis constraints on $Ω_{B}$ and $N_{ν}$

Peter J. Kernan and Lawrence M. Krauss

Phys. Rev. Lett. 72, 3309 (1994) - Published 23 May, 1994

Elementary Particles and Fields

Search for a light scalar top squark in $e^{+}$ $e^{-}$ reactions at $E_{c . m .}$ =58 GeV

J. Shirai et al.

Phys. Rev. Lett. 72, 3313 (1994) - Published 23 May, 1994

Nuclear Physics

Non-Abelian excitations of the quark-gluon plasma

Jean-Paul Blaizot and Edmond Iancu

Phys. Rev. Lett. 72, 3317 (1994) - Published 23 May, 1994

Towards limiting temperatures in nuclei: The behavior of collective motion

J. H. Le Faou et al.

Phys. Rev. Lett. 72, 3321 (1994) - Published 23 May, 1994

First Measurement of the Imaginary Part of the Transverse-Longitudinal Nuclear Response

J. Mandeville et al.

Phys. Rev. Lett. 72, 3325 (1994) - Published 23 May, 1994

Atomic, Molecular, and Optical Physics

Direct measurement of ${He}^{+}$ ions produced by Compton scattering between 2.5 and 5.5 keV

J. A. R. Samson, Z. X. He, R. J. Bartlett, and M. Sagurton

Phys. Rev. Lett. 72, 3329 (1994) - Published 23 May, 1994

Force and diffusion measurements in sub-Doppler laser cooling

M. D. Hoogerland, H. F. P. de Bie, H. C. W. Beijerinck, K. A. H. van Leeuwen, P. van der Straten, E. J. D. Vredenbregt, and H. J. Metcalf

Phys. Rev. Lett. 72, 3332 (1994) - Published 23 May, 1994

Resonance structure and absolute cross sections in near-threshold electron-impact excitation of the 4 $s^{2 1}$ S→4s4p ${}^{3}$ P intercombination transition in ${Kr}^{6 +}$

M. E. Bannister, X. Q. Guo, T. M. Kojima, and G. H. Dunn

Phys. Rev. Lett. 72, 3336 (1994) - Published 23 May, 1994

From Lamb shift to light shifts: Vacuum and subphoton cavity fields measured by atomic phase sensitive detection

M. Brune, P. Nussenzveig, F. Schmidt-Kaler, F. Bernardot, A. Maali, J. M. Raimond, and S. Haroche

Phys. Rev. Lett. 72, 3339 (1994) - Published 23 May, 1994

Nonlinear Dynamics, Fluid Dynamics, Classical Optics, Etc.

Photon-energy dissipation caused by an external electric circuit in ‘‘virtual’’ photoexcitation processes

Akira Shimizu and Masamichi Yamanishi

Phys. Rev. Lett. 72, 3343 (1994) - Published 23 May, 1994

Viscous and elastic fingering instabilities in foam

S. S. Park and D. J. Durian

Phys. Rev. Lett. 72, 3347 (1994) - Published 23 May, 1994

Plasma and Beam Physics

Reflectivity of intense femtosecond laser pulses from a simple metal

A. Ng, P. Celliers, A. Forsman, R. M. More, Y. T. Lee, F. Perrot, M. W. C. Dharma-wardana, and G. A. Rinker

Phys. Rev. Lett. 72, 3351 (1994) - Published 23 May, 1994

Experimental verification of the inhomogeneous energy-density driven instability

M. E. Koepke, W. E. Amatucci, J. J. Carroll, III, and T. E. Sheridan

Phys. Rev. Lett. 72, 3355 (1994) - Published 23 May, 1994

Condensed Matter: Structure, Etc.

Isotopically resolved Raman spectra of $C_{60}$

S. Guha, J. Menéndez, J. B. Page, G. B. Adams, G. S. Spencer, J. P. Lehman, P. Giannozzi, and S. Baroni

Phys. Rev. Lett. 72, 3359 (1994) - Published 23 May, 1994

Photoplastic effect on ice

Niyaz N. Khusnatdinov and Victor F. Petrenko

Phys. Rev. Lett. 72, 3363 (1994) - Published 23 May, 1994

Scaling behavior of fluctuations in systems with continuous symmetry

Ulrich Zürcher

Phys. Rev. Lett. 72, 3367 (1994) - Published 23 May, 1994

Enhanced surface vibrations and reconstruction of the Al(111) surface induced by Rb adsorption

M. M. Nielsen, J. Burchhardt, D. L. Adams, E. Lundgren, and J. N. Andersen

Phys. Rev. Lett. 72, 3370 (1994) - Published 23 May, 1994

Atomic force microscope study of growth kinetics: Scaling in the heteroepitaxy of CuCl on ${CaF}_{2}$ (111)

William M. Tong, R. Stanley Williams, Akihisa Yanase, Yusaburo Segawa, and Mark S. Anderson

Phys. Rev. Lett. 72, 3374 (1994) - Published 23 May, 1994

Orientational instability of vicinal Pt surfaces close to (111)

Elmar Hahn, Hansjörg Schief, Vittorio Marsico, Alexander Fricke, and Klaus Kern

Phys. Rev. Lett. 72, 3378 (1994) - Published 23 May, 1994

Quantum dots formed by interface fluctuations in AlAs/GaAs coupled quantum well structures

A. Zrenner, L. V. Butov, M. Hagn, G. Abstreiter, G. Böhm, and G. Weimann

Phys. Rev. Lett. 72, 3382 (1994) - Published 23 May, 1994

Condensed Matter: Electronic Properties, Etc.

Microwave reflectivity of ${CeRu}_{2}$ ${Si}_{2}$ : Collective excitations in the electronic Fermi liquid

G. Hampel

Phys. Rev. Lett. 72, 3386 (1994) - Published 23 May, 1994

${VO}_{2}$ : Peierls or Mott-Hubbard? A view from band theory

Renata M. Wentzcovitch, Werner W. Schulz, and Philip B. Allen

Phys. Rev. Lett. 72, 3389 (1994) - Published 23 May, 1994

Hydrogen-induced metastable changes in the electrical conductivity of polycrystalline silicon

N. H. Nickel, N. M. Johnson, and Chris G. Van de Walle

Phys. Rev. Lett. 72, 3393 (1994) - Published 23 May, 1994

Plasmon assisted resonant tunneling in a double barrier heterostructure

C. Zhang, M. L. F. Lerch, A. D. Martin, P. E. Simmonds, and L. Eaves

Phys. Rev. Lett. 72, 3397 (1994) - Published 23 May, 1994

Kondo-assisted and resonant tunneling via a single charge trap: A realization of the Anderson model out of equilibrium

D. C. Ralph and R. A. Buhrman

Phys. Rev. Lett. 72, 3401 (1994) - Published 23 May, 1994

Origin of the ν=1/2 fractional quantum Hall state in wide single quantum wells

Y. W. Suen, H. C. Manoharan, X. Ying, M. B. Santos, and M. Shayegan

Phys. Rev. Lett. 72, 3405 (1994) - Published 23 May, 1994

Low-temperature vortex dynamics in twinned superconductors

M. Cristina Marchetti and Valerii M. Vinokur

Phys. Rev. Lett. 72, 3409 (1994) - Published 23 May, 1994

Vortex dynamics and melting in niobium

J. W. Lynn, N. Rosov, T. E. Grigereit, H. Zhang, and T. W. Clinton

Phys. Rev. Lett. 72, 3413 (1994) - Published 23 May, 1994

Gap determination in the field-induced-spin-density-wave state of (TMTSF $)_{2}$ ${ClO}_{4}$ via far-infrared photoconductivity

J. Lefebvre, J. Beerens, C. Bourbonnais, L. G. Caron, C. Lenoir, and P. Batail

Phys. Rev. Lett. 72, 3417 (1994) - Published 23 May, 1994

Diffuse x-ray scattering from ${La}_{2 - x}$ ${Sr}_{x}$ ${NiO}_{4}$ and ${La}_{2 - y}$ ${Sr}_{y}$ ${CuO}_{4}$

E. D. Isaacs, G. Aeppli, P. Zschack, S-W. Cheong, H. Williams, and D. J. Buttrey

Phys. Rev. Lett. 72, 3421 (1994) - Published 23 May, 1994

Rigorous criteria for ferromagnetism in itinerant electron systems

Rainer Strack and Dieter Vollhardt

Phys. Rev. Lett. 72, 3425 (1994) - Published 23 May, 1994

Magnetocaloric effects in ${YBa}_{2}$ ${Cu}_{3}$ $O_{7 - δ}$ : Evidence for a surface barrier

Mitsuo Watanabe and Tadao Iwata

Phys. Rev. Lett. 72, 3429 (1994) - Published 23 May, 1994

Conservation of angular momentum in the problem of tunneling of the magnetic moment

Eugene M. Chudnovsky

Phys. Rev. Lett. 72, 3433 (1994) - Published 23 May, 1994

COMMENTS

Comment on ‘‘Nonuniversality of the localization length in a quantum chaotic system’’

Alexander D. Mirlin

Phys. Rev. Lett. 72, 3437 (1994) - Published 23 May, 1994

ERRATA

Garg Replies

Anupam Garg

Phys. Rev. Lett. 72, 3438 (1994) - Published 23 May, 1994