Volume 74, Issue 21

D. Chatellard, J.-P. Egger, E. Jeannet, A. Badertscher, M. Bogdan, P. F. A. Goudsmit, H. J. Leisi, E. Matsinos, H.-Ch. Schröder, D. Sigg, Z. G. Zhao, E. C. Aschenauer, K. Gabathuler, P. Hauser, L. M. Simons, A. J. Rusi, and El Hassani

Phys. Rev. Lett. 74, 4157 (1995) - Published 22 May, 1995

Atomic, Molecular, and Optical Physics

Two-Color Multiphoton Ionization of Atoms Using High-Order Harmonic Radiation

Valérie Véniard, Richard Taïeb, and Alfred Maquet

Phys. Rev. Lett. 74, 4161 (1995) - Published 22 May, 1995

Parity Nonconservation in the $6 s^{2}^{1} S_{0} \to 6 s 5 d {{}^{3}D}_{1}$ Transition in Atomic Ytterbium

David DeMille

Phys. Rev. Lett. 74, 4165 (1995) - Published 22 May, 1995

Very High ${Kr}^{7 + }$ Rydberg States after Electron Capture from Laser-Excited ${Rb}^{} (17 p)$ Atoms into ${Kr}^{8 +}$

A. Pesnelle, R. Trainham, J. Pascale, E. Monnand, and H. J. Andrä

Phys. Rev. Lett. 74, 4169 (1995) - Published 22 May, 1995

Electron-Impact Ionization of Fe $^{15 +}$ Ions: An Ion Storage Ring Cross Section Measurement

J. Linkemann, A. Müller, J. Kenntner, D. Habs, D. Schwalm, A. Wolf, N. R. Badnell, and M. S. Pindzola

Phys. Rev. Lett. 74, 4173 (1995) - Published 22 May, 1995

Spectroscopy of Size-Selected Neutral Clusters: Femtosecond Evolution of Neutral Silver Trimers

S. Wolf, G. Sommerer, S. Rutz, E. Schreiber, T. Leisner, L. Wöste, and R. Stephen Berry

Phys. Rev. Lett. 74, 4177 (1995) - Published 22 May, 1995

1/ $f$ Spectra in Finite Atomic Clusters

Saroj K. Nayak, Ramakrishna Ramaswamy, and Charusita Chakravarty

Phys. Rev. Lett. 74, 4181 (1995) - Published 22 May, 1995

Nonlinear Dynamics, Fluid Dynamics, Classical Optics, Etc.

Short Wavelength Bifurcations and Size Instabilities in Coupled Oscillator Systems

James F. Heagy, Louis M. Pecora, and Thomas L. Carroll

Phys. Rev. Lett. 74, 4185 (1995) - Published 22 May, 1995

Pulse-Coupled Relaxation Oscillators: From Biological Synchronization to Self-Organized Criticality

S. Bottani

Phys. Rev. Lett. 74, 4189 (1995) - Published 22 May, 1995

Experimental Evidence for Recurrent Multiple Scattering Events of Light in Disordered Media

Diederik S. Wiersma, Meint P. van Albada, Bart A. van Tiggelen, and Ad Lagendijk

Phys. Rev. Lett. 74, 4193 (1995) - Published 22 May, 1995

Novel Four-Wave Mixing Phenomenon in a Raman Amplifier

C. J. Hooker, E. J. Divall, G. J. Hirst, J. M. D. Lister, M. J. Shaw, and D. C. Wilson

Phys. Rev. Lett. 74, 4197 (1995) - Published 22 May, 1995

Penta-Hepta Defect Motion in Hexagonal Patterns

Lev S. Tsimring

Phys. Rev. Lett. 74, 4201 (1995) - Published 22 May, 1995

Dynamics of Surface Roughening with Quenched Disorder

S. Havlin, L. A. N. Amaral, S. V. Buldyrev, S. T. Harrington, and H. E. Stanley

Phys. Rev. Lett. 74, 4205 (1995) - Published 22 May, 1995

Plasma and Beam Physics

Dynamic and Debye Shielding and Antishielding in Magnetized, Collisionless Plasmas

C. Hansen and J. Fajans

Phys. Rev. Lett. 74, 4209 (1995) - Published 22 May, 1995

Transport and Damping from Rotational Pumping in Magnetized Electron Plasmas

B. P. Cluggish and C. F. Driscoll

Phys. Rev. Lett. 74, 4213 (1995) - Published 22 May, 1995

Observation of Continuous Divertor Detachment in $H$ -Mode Discharges in ASDEX Upgrade

O. Gruber et al.

Phys. Rev. Lett. 74, 4217 (1995) - Published 22 May, 1995

Condensed Matter: Structure, Etc.

Structural Isotope Effect in Water Bilayers Adsorbed on Ru(001)

Georg Held and Dietrich Menzel

Phys. Rev. Lett. 74, 4221 (1995) - Published 22 May, 1995

Stabilizing New Morphologies by Blending Homopolymer with Block Copolymer

M. W. Matsen

Phys. Rev. Lett. 74, 4225 (1995) - Published 22 May, 1995

Monte Carlo Simulations of Anomalous Relaxation in Percolating Systems

S. Fujiwara and F. Yonezawa

Phys. Rev. Lett. 74, 4229 (1995) - Published 22 May, 1995

Dynamic Structure Factor of a Helium-Neon Dense Gas Mixture: Crossover from Hydrodynamics to the Microscopic Regime

E. Enciso, N. G. Almarza, P. Domínguez, M. A. González, and F. J. Bermejo

Phys. Rev. Lett. 74, 4233 (1995) - Published 22 May, 1995

Polymer Confinement in Surfactant Bilayers of a Lyotropic Lamellar Phase

E. Z. Radlinska, T. Gulik-Krzywicki, F. Lafuma, D. Langevin, W. Urbach, C. E. Williams, and R. Ober

Phys. Rev. Lett. 74, 4237 (1995) - Published 22 May, 1995

True Incommensurate Phase in Mixtures of Two Polar Liquid Crystalline Materials

Joseph T. Mang, Brian Cull, Yushan Shi, Prem Patel, and Satyendra Kumar

Phys. Rev. Lett. 74, 4241 (1995) - Published 22 May, 1995

Melted-Grain-Boundary Phase in Chiral Smectic- $C$ Liquid Crystals near the Triple $N^{} A^{} C^{*}$ Point

I. Dozov

Phys. Rev. Lett. 74, 4245 (1995) - Published 22 May, 1995

High-Frequency Monochromatic Acoustic Waves Generated by Laser-Induced Thermomodulation

E. P. N. Damen, A. F. M. Arts, and H. W. de Wijn

Phys. Rev. Lett. 74, 4249 (1995) - Published 22 May, 1995

Laws for Stationary States in Systems with Extremal Dynamics

Maya Paczuski, Per Bak, and Sergei Maslov

Phys. Rev. Lett. 74, 4253 (1995) - Published 22 May, 1995

Glassy Solutions of the Kardar-Parisi-Zhang Equation

M. A. Moore, T. Blum, J. P. Doherty, M. Marsili, J-P. Bouchaud, and P. Claudin

Phys. Rev. Lett. 74, 4257 (1995) - Published 22 May, 1995

Reentrant Nematic Phase in a Mixture of Associating Cylindrical Molecules

Richard P. Sear and George Jackson

Phys. Rev. Lett. 74, 4261 (1995) - Published 22 May, 1995

Condensed Matter: Electronic Properties, Etc.

Robustness of a Local Fermi Liquid against Ferromagnetism and Phase Separation

Jan R. Engelbrecht and Kevin S. Bedell

Phys. Rev. Lett. 74, 4265 (1995) - Published 22 May, 1995

Spectral Statistics of Mesoscopic Wires: Crossover from Wigner-Dyson to Poisson Regime

Alexander Altland and Dirk Fuchs

Phys. Rev. Lett. 74, 4269 (1995) - Published 22 May, 1995

Coherent Plasma Oscillations in Bulk Semiconductors

W. Sha, Arthur L. Smirl, and W. F. Tseng

Phys. Rev. Lett. 74, 4273 (1995) - Published 22 May, 1995

Analytic Results for $N$ Particles with $1 / r^{2}$ Interaction in Two Dimensions and an External Magnetic Field

Neil F. Johnson and Luis Quiroga

Phys. Rev. Lett. 74, 4277 (1995) - Published 22 May, 1995

Antiferromagnetically Induced Photoemission Band in the Cuprates

Stephan Haas, Adriana Moreo, and Elbio Dagotto

Phys. Rev. Lett. 74, 4281 (1995) - Published 22 May, 1995

Kohn's Theorem and Correlation Functions for a Fermi Liquid

Kevin S. Bedell and Paulo F. Farinas

Phys. Rev. Lett. 74, 4285 (1995) - Published 22 May, 1995

Exactly Solvable Model of a Quantum Spin Glass

Th. M. Nieuwenhuizen

Phys. Rev. Lett. 74, 4289 (1995) - Published 22 May, 1995

Quantum Description of Spherical Spins

Th. M. Nieuwenhuizen

Phys. Rev. Lett. 74, 4293 (1995) - Published 22 May, 1995

Doping Induced Quantum Bound States within the Haldane Gap

Zhong-Yi Lu, Zhao-Bin Su, and Lu Yu

Phys. Rev. Lett. 74, 4297 (1995) - Published 22 May, 1995

Singlet Magnetism in Heavy Fermions

Victor Barzykin and Lev P. Gor'kov

Phys. Rev. Lett. 74, 4301 (1995) - Published 22 May, 1995

No Phase Transition in a Magnetic Field in the Ising Spin Glass F $e_{0.5}$ M $n_{0.5}$ Ti $O_{3}$

J. Mattsson, T. Jonsson, P. Nordblad, H. Aruga Katori, and A. Ito

Phys. Rev. Lett. 74, 4305 (1995) - Published 22 May, 1995

Nanoscale Visualization and Control of Ferroelectric Domains by Atomic Force Microscopy

Oleg Kolosov, Alexei Gruverman, Jun Hatano, Koichiro Takahashi, and Hiroshi Tokumoto

Phys. Rev. Lett. 74, 4309 (1995) - Published 22 May, 1995

Theory of Electronic Raman Scattering in Disordered Unconventional Superconductors

T. P. Devereaux

Phys. Rev. Lett. 74, 4313 (1995) - Published 22 May, 1995

Intermittency of Single Molecule Reaction Dynamics in Fluctuating Environments

Jin Wang and Peter Wolynes

Phys. Rev. Lett. 74, 4317 (1995) - Published 22 May, 1995

Cross-Disciplinary Physics

Correlations and Coarsening in the $q$ -State Potts Model

Clément Sire and Satya N. Majumdar

Phys. Rev. Lett. 74, 4321 (1995) - Published 22 May, 1995

Critical Phenomena in Morphology Transitions of Growth Models with Competition

Yukio Saito and Heiner Müller-Krumbhaar

Phys. Rev. Lett. 74, 4325 (1995) - Published 22 May, 1995

Rheology of Wormlike Micelles: Two Universality Classes

Ben O'Shaughnessy and Jane Yu

Phys. Rev. Lett. 74, 4329 (1995) - Published 22 May, 1995

Transient Trapping Desorption of Molecules at Surfaces

Age Raukema and Aart W. Kleyn

Phys. Rev. Lett. 74, 4333 (1995) - Published 22 May, 1995

Exact Solution for On-Line Learning in Multilayer Neural Networks

David Saad and Sara A. Solla

Phys. Rev. Lett. 74, 4337 (1995) - Published 22 May, 1995

Scaling and Singularities in the Entrainment of Globally Coupled Oscillators

John David Crawford

Phys. Rev. Lett. 74, 4341 (1995) - Published 22 May, 1995

New Solutions to the Helfrich Variation Problem for the Shapes of Lipid Bilayer Vesicles: Beyond Delaunay's Surfaces

Hiroyoshi Naito, Masahiro Okuda, and Ou-Yang Zhong-can

Phys. Rev. Lett. 74, 4345 (1995) - Published 22 May, 1995

Two-Level Systems in Myoglobin Probed by Non-Lorentzian Hole Broadening in a Temperature-Cycling Experiment

Atusi Kurita, Yutaka Shibata, and Takashi Kushida

Phys. Rev. Lett. 74, 4349 (1995) - Published 22 May, 1995

COMMENTS

Comment on “Resonant Bonds in Symmetry-Lowering Distortion around a Silicon Divacancy”

George D. Watkins

Phys. Rev. Lett. 74, 4353 (1995) - Published 22 May, 1995

Saito and Oshiyama Reply:

Mineo Saito and Atsushi Oshiyama

Phys. Rev. Lett. 74, 4354 (1995) - Published 22 May, 1995

Comment on “Excitonic Recombination of Degenerate Two-Dimensional Electrons with Localized Photoexcited Holes in a Single Heterojunction Quantum Well”

P. O. Holtz, Q. X. Zhao, C. I. Harris, J. P. Bergman, T. Lundström, and B. Monemar

Phys. Rev. Lett. 74, 4355 (1995) - Published 22 May, 1995

Folkes et al. Reply:

P. A. Folkes, M. Dutta, S. Rudin, H. Shen, W. Zhou, D. Smith, M. Taysing-Lara, P. Newman, and M. Cole

Phys. Rev. Lett. 74, 4356 (1995) - Published 22 May, 1995

Predicting Sandpile Avalanches

Ian Sammis and J. M. Carlson

Phys. Rev. Lett. 74, 4357 (1995) - Published 22 May, 1995

Rosendahl and Rutledge Reply:

J. Rosendahl, M. Vekić, and J. E. Rutledge

Phys. Rev. Lett. 74, 4358 (1995) - Published 22 May, 1995

ERRATA

Relativistically Covariant Symmetry in QED

Zhong Tang and David Finkelstein

Phys. Rev. Lett. 74, 4359 (1995) - Published 22 May, 1995

Howson, Lawrie, and Overend Reply

Mark A. Howson, Ian D. Lawrie, and Neil Overend

Phys. Rev. Lett. 74, 4359 (1995) - Published 22 May, 1995

Instabilities in Cellular Dendritic Morphogenesis

H. G. E. Hentschel and Alan Fine

Phys. Rev. Lett. 74, 4360 (1995) - Published 22 May, 1995