Volume 76, Issue 20

13 May 1996

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LETTERS

Elementary Particles and Fields

Gravitational Breaking of the Grand Unified Theory Group and the Grand Unified Theory–Planck Hierarchy

S. Urano, D. Ring, and R. Arnowitt

Phys. Rev. Lett. 76, 3663 (1996) - Published 13 May, 1996

Nuclear Physics

Asymmetries for Elastic Scattering of $π^{+}$ from Polarized $^{3} He$ and the $Δ$ -Neutron Spin-Spin Interaction

M. A. Espy et al.

Phys. Rev. Lett. 76, 3667 (1996) - Published 13 May, 1996

Energy Staggering in Superdeformed Bands in $^{131}$ Ce, $^{132}$ Ce, and $^{133}$ Ce

A. T. Semple, P. J. Nolan, C. W. Beausang, S. A. Forbes, E. S. Paul, J. N. Wilson, R. Wadsworth, K. Hauschild, I. M. Hibbert, R. M. Clark, J. Gizon, A. Gizon, D. Santos, and J. Simpson

Phys. Rev. Lett. 76, 3671 (1996) - Published 13 May, 1996

Atomic, Molecular, and Optical Physics

Strong Hyperfine Induced Quenching of a Metastable State in ${Xe}^{+}$ Observed by Hyperfine Selective Laser Probing of a Stored Ion Beam

Sven Mannervik, Lars Broström, Johan Lidberg, Lars-Olov Norlin, and Peder Royen

Phys. Rev. Lett. 76, 3675 (1996) - Published 13 May, 1996

State-Selective Electron Capture in Low Velocity Multiply Charged Ion, Helium Collisions

A. Cassimi, S. Duponchel, X. Flechard, P. Jardin, P. Sortais, D. Hennecart, and R. E. Olson

Phys. Rev. Lett. 76, 3679 (1996) - Published 13 May, 1996

Measurement Induced Localization from Spontaneous Decay

M. Holland, S. Marksteiner, P. Marte, and P. Zoller

Phys. Rev. Lett. 76, 3683 (1996) - Published 13 May, 1996

Index of Refraction for an Optical Medium with Clamped Quantum Phase

J. H. Eberly, A. Rahman, and R. Grobe

Phys. Rev. Lett. 76, 3687 (1996) - Published 13 May, 1996

Nonlinear Dynamics, Fluid Dynamics, Classical Optics, Etc.

Role of the Environment in Chaotic Quantum Dynamics

B. S. Helmkamp and D. A. Browne

Phys. Rev. Lett. 76, 3691 (1996) - Published 13 May, 1996

Doppler Shift of Self-Reflected Optical Pulses at an Interface: Dynamic Nonlinear Optical Skin Effect

W. Forysiak, R. G. Flesch, J. V. Moloney, and E. M. Wright

Phys. Rev. Lett. 76, 3695 (1996) - Published 13 May, 1996

Observation of Manakov Spatial Solitons in AlGaAs Planar Waveguides

J. U. Kang, G. I. Stegeman, J. S. Aitchison, and N. Akhmediev

Phys. Rev. Lett. 76, 3699 (1996) - Published 13 May, 1996

Nonequilibrium Brittle Fracture Propagation: Steady State, Oscillations, and Intermittency

Raphael Blumenfeld

Phys. Rev. Lett. 76, 3703 (1996) - Published 13 May, 1996

Nonuniversality of the Scaling Exponents of a Passive Scalar Convected by a Random Flow

M. Chertkov, G. Falkovich, and V. Lebedev

Phys. Rev. Lett. 76, 3707 (1996) - Published 13 May, 1996

Scalings and Relative Scalings in the Navier-Stokes Turbulence

Nianzheng Cao, Shiyi Chen, and Zhen-Su She

Phys. Rev. Lett. 76, 3711 (1996) - Published 13 May, 1996

Plasma and Beam Physics

Plasma Suppression of Beam-Beam Interaction in Circular Colliders

G. V. Stupakov and P. Chen

Phys. Rev. Lett. 76, 3715 (1996) - Published 13 May, 1996

Reduction of Proton Losses in HERA by Compensating Tune Ripple due to Power Supplies

O. S. Brüning and F. Willeke

Phys. Rev. Lett. 76, 3719 (1996) - Published 13 May, 1996

Demonstration of Emittance Compensation through the Measurement of the Slice Emittance of a 10-ps Electron Bunch

X. Qiu, K. Batchelor, I. Ben-Zvi, and X-J. Wang

Phys. Rev. Lett. 76, 3723 (1996) - Published 13 May, 1996

Location of Ion-Acoustic Waves from Back and Side Stimulated Brillouin Scattering

C. Labaune, H. A. Baldis, E. Schifano, B. S. Bauer, A. Michard, N. Renard, W. Seka, J. D. Moody, and K. G. Estabrook

Phys. Rev. Lett. 76, 3727 (1996) - Published 13 May, 1996

Condensed Matter: Structure, Etc.

New Phase-Sensitive Method of Single-Crystal Characterization under X-Ray Diffraction Conditions

A. Yu. Nikulin and A. Yu. Ignatiev

Phys. Rev. Lett. 76, 3731 (1996) - Published 13 May, 1996

Investigation of the Phase Shift in X-Ray Forward Diffraction Using an X-Ray Interferometer

K. Hirano and A. Momose

Phys. Rev. Lett. 76, 3735 (1996) - Published 13 May, 1996

Lyapunov Spectra, Instantaneous Normal Mode Spectra, and Relaxation in the Lennard-Jones Liquid

Srikanth Sastry

Phys. Rev. Lett. 76, 3738 (1996) - Published 13 May, 1996

Fluid Mixtures of Parallel Hard Cubes

José A. Cuesta

Phys. Rev. Lett. 76, 3742 (1996) - Published 13 May, 1996

Nucleation Initiated Spinodal Decomposition in a Polymerizing System

Thein Kyu and Jae-Hyung Lee

Phys. Rev. Lett. 76, 3746 (1996) - Published 13 May, 1996

Invasion Percolation and Global Optimization

Albert-László Barabási

Phys. Rev. Lett. 76, 3750 (1996) - Published 13 May, 1996

Invasion Percolation and Eden Growth: Geometry and Universality

Marek Cieplak, Amos Maritan, and Jayanth R. Banavar

Phys. Rev. Lett. 76, 3754 (1996) - Published 13 May, 1996

Transverse Force on a Quantized Vortex in a Superfluid

D. J. Thouless, Ping Ao, and Qian Niu

Phys. Rev. Lett. 76, 3758 (1996) - Published 13 May, 1996

Evidence for Convective Effects in Breath Figure Formation on Volatile Fluid Surfaces

A. V. Limaye, R. D. Narhe, A. M. Dhote, and S. B. Ogale

Phys. Rev. Lett. 76, 3762 (1996) - Published 13 May, 1996

Simulating the Spreading of a Drop in the Terraced Wetting Regime

S. Bekink, S. Karaborni, G. Verbist, and K. Esselink

Phys. Rev. Lett. 76, 3766 (1996) - Published 13 May, 1996

Formation of Condensed Phase Patterns in Adsorption Layers

V. Melzer and D. Vollhardt

Phys. Rev. Lett. 76, 3770 (1996) - Published 13 May, 1996

Noise-Induced Roughening Evolution of Amorphous Si films Grown by Thermal Evaporation

H.-N. Yang, Y.-P. Zhao, G.-C. Wang, and T.-M. Lu

Phys. Rev. Lett. 76, 3774 (1996) - Published 13 May, 1996

Dimensionally Induced Structural transformations in Titanium-Aluminum Multilayers

Rajarshi Banerjee, Rajiv Ahuja, and Hamish L. Fraser

Phys. Rev. Lett. 76, 3778 (1996) - Published 13 May, 1996

New Model of the Initial Stages of Si(111)-(7 $\times$ 7) Oxidation

G. Dujardin, A. Mayne, G. Comtet, L. Hellner, M. Jamet, E. Le Goff, and P. Millet

Phys. Rev. Lett. 76, 3782 (1996) - Published 13 May, 1996

Condensed Matter: Electronic Properties, Etc.

Quantum Oscillations in the Layered Perovskite Superconductor S $r_{2}$ Ru $O_{4}$

A. P. Mackenzie, S. R. Julian, A. J. Diver, G. J. McMullan, M. P. Ray, G. G. Lonzarich, Y. Maeno, S. Nishizaki, and T. Fujita

Phys. Rev. Lett. 76, 3786 (1996) - Published 13 May, 1996

Diffusion and Charge Dynamics of Negatively Charged Muonium in n-Type GaAs

K. H. Chow, B. Hitti, R. F. Kiefl, S. R. Dunsiger, R. L. Lichti, and T. L. Estle

Phys. Rev. Lett. 76, 3790 (1996) - Published 13 May, 1996

Quantum Localization Effects on Spin Transport in Semiconductor Quantum Wells with Zinc-Blende Crystal Structure

A. G. Mal`shukov, K. A. Chao, and M. Willander

Phys. Rev. Lett. 76, 3794 (1996) - Published 13 May, 1996

Photorefractive Gunn Effect

Mordechai Segev, Brandon Collings, and David Abraham

Phys. Rev. Lett. 76, 3798 (1996) - Published 13 May, 1996

Direct Measurement of the Band Structure of a One-Dimensional Surface Superlattice

B. Kardynał, C. H. W. Barnes, E. H. Linfield, D. A. Ritchie, K. M. Brown, G. A. C. Jones, and M. Pepper

Phys. Rev. Lett. 76, 3802 (1996) - Published 13 May, 1996

Observation of Hot-Electron Shot Noise in a Metallic Resistor

Andrew H. Steinbach, John M. Martinis, and Michel H. Devoret

Phys. Rev. Lett. 76, 3806 (1996) - Published 13 May, 1996

Measurement of the Far-Infrared Magnetoconductivity Tensor of Superconducting ${YBa}_{2} {Cu}_{3} O_{7 - δ}$ Thin Films

H.-T. S. Lihn, S. Wu, H. D. Drew, S. Kaplan, Qi Li, and D. B. Fenner

Phys. Rev. Lett. 76, 3810 (1996) - Published 13 May, 1996

Supercurrent Noise in Quantum Point Contacts

D. Averin and H. T. Imam

Phys. Rev. Lett. 76, 3814 (1996) - Published 13 May, 1996

Current-Loop Model for the Intermediate State of Type-I Superconductors

Raymond E. Goldstein, David P. Jackson, and Alan T. Dorsey

Phys. Rev. Lett. 76, 3818 (1996) - Published 13 May, 1996

Phase Diagram of Depleted Heisenberg Model for Ca $V_{4}$ $O_{9}$

Matthias Troyer, Hiroshi Kontani, and Kazuo Ueda

Phys. Rev. Lett. 76, 3822 (1996) - Published 13 May, 1996

Lattice Effects and Magnetic Order in the Canted Ferromagnetic Insulator ${La}_{0.875} {Sr}_{0.125} {MnO}_{3 + δ}$

D. N. Argyriou, J. F. Mitchell, C. D. Potter, D. G. Hinks, J. D. Jorgensen, and S. D. Bader

Phys. Rev. Lett. 76, 3826 (1996) - Published 13 May, 1996

Macroscopic Measurement of Resonant Magnetization Tunneling in High-Spin Molecules

Jonathan R. Friedman, M. P. Sarachik, J. Tejada, and R. Ziolo

Phys. Rev. Lett. 76, 3830 (1996) - Published 13 May, 1996

New Type of Oscillatory Exchange Coupling Induced by Ordering in the Magnetic Layers

J. Kudrnovský, V. Drchal, C. Blaas, I. Turek, and P. Weinberger

Phys. Rev. Lett. 76, 3834 (1996) - Published 13 May, 1996

Direct Observation of the Spin-Density-Wave Gap in $(TMTSF)_{2} {PF}_{6}$

L. Degiorgi, M. Dressel, A. Schwartz, B. Alavi, and G. Grüner

Phys. Rev. Lett. 76, 3838 (1996) - Published 13 May, 1996

Sonoluminescence as Quantum Vacuum Radiation

Claudia Eberlein

Phys. Rev. Lett. 76, 3842 (1996) - Published 13 May, 1996

Enhanced Resonant X-Ray Emissions of Mechanically Milled Hexagonal Boron Nitride in Boron K-Shell Excitation

Yasuji Muramatsu, Masaharu Oshima, Jun Kawai, Shiro Tadokoro, Hirohiko Adachi, Akane Agui, Shik Shin, Hiroo Kato, Hidenori Kohzuki, and Muneyuki Motoyama

Phys. Rev. Lett. 76, 3846 (1996) - Published 13 May, 1996

Resonant Coherent Excitation of Surface Channeled Ions

K. Kimura, H. Ida, M. Fritz, and M. Mannami

Phys. Rev. Lett. 76, 3850 (1996) - Published 13 May, 1996