Volume 67, Issue 20

11 November 1991

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LETTERS

General Physics

Distributions of avoided crossings for quantum chaotic systems

Jakub Zakrzewski and Marek Kuś

Phys. Rev. Lett. 67, 2749 (1991) - Published 11 November, 1991

Collective frequencies and metastability in networks of limit-cycle oscillators with time delay

Ernst Niebur, Heinz G. Schuster, and Daniel M. Kammen

Phys. Rev. Lett. 67, 2753 (1991) - Published 11 November, 1991

Percolation, the special FTHETA’ point, and the FTHETA-FTHETA’ universality puzzle

C. Vanderzande, A. L. Stella, and F. Seno

Phys. Rev. Lett. 67, 2757 (1991) - Published 11 November, 1991

Tests of signal locality and Einstein-Bell locality for multiparticle systems

S. M. Roy and Virendra Singh

Phys. Rev. Lett. 67, 2761 (1991) - Published 11 November, 1991

Elementary Particles and Fields

Strong CP problem and parity

S. M. Barr, Darwin Chang, and Goran Senjanović

Phys. Rev. Lett. 67, 2765 (1991) - Published 11 November, 1991

Nuclear Physics

Disappearance of flow in intermediate-energy nucleus-nucleus collisions

Hong Ming Xu

Phys. Rev. Lett. 67, 2769 (1991) - Published 11 November, 1991

Pb $(^{6}$ Li,αd)Pb breakup experiment to test feasibility of extracting the astrophysically relevant α+d capture cross section

J. Hesselbarth and K. T. Knöpfle

Phys. Rev. Lett. 67, 2773 (1991) - Published 11 November, 1991

Supersymmetric quantum mechanics and superdeformed nuclei

R. D. Amado, R. Bijker, F. Cannata, and J. P. Dedonder

Phys. Rev. Lett. 67, 2777 (1991) - Published 11 November, 1991

Atomic, Molecular, and Optical Physics

Influence of non-Markovian effects in degenerate four-wave-mixing processes

J. P. Lavoine and A. A. Villaeys

Phys. Rev. Lett. 67, 2780 (1991) - Published 11 November, 1991

Precise measurement of parity nonconserving optical rotation at 876 nm in atomic bismuth

M. J. D. Macpherson, K. P. Zetie, R. B. Warrington, D. N. Stacey, and J. P. Hoare

Phys. Rev. Lett. 67, 2784 (1991) - Published 11 November, 1991

Nonlinear Dynamics, Fluid Dynamics, Classical Optics, Etc.

Pairing effect of photons in nonlinear polar crystals

Ze Cheng

Phys. Rev. Lett. 67, 2788 (1991) - Published 11 November, 1991

Plasma and Beam Physics

Plasma production in a toroidal heliac by helicon waves

P. K. Loewenhardt, B. D. Blackwell, R. W. Boswell, G. D. Conway, and S. M. Hamberger

Phys. Rev. Lett. 67, 2792 (1991) - Published 11 November, 1991

Condensed Matter: Structure, Etc.

High-pressure viscoelastic properties and equation of state of liquids derived from Brillouin data

W. F. Oliver, C. A. Herbst, S. M. Lindsay, and G. H. Wolf

Phys. Rev. Lett. 67, 2795 (1991) - Published 11 November, 1991

Domain boundary energies and interactions at 2D criticality via conformal field theory

P. Kleban

Phys. Rev. Lett. 67, 2799 (1991) - Published 11 November, 1991

Damping of optical phonons in ${Ga}_{1 - x}$ ${Al}_{x}$ As alloys

Bernard Jusserand, Francis Mollot, Lucia G. Quagliano, Guy Le Roux, and Richard Planel

Phys. Rev. Lett. 67, 2803 (1991) - Published 11 November, 1991

Temperature effects in nonequilibrium phonon decay

Xiao-jun Wang, W. M. Dennis, and W. M. Yen

Phys. Rev. Lett. 67, 2807 (1991) - Published 11 November, 1991

Electronic structure measurements in KI at high pressure using three-photon spectroscopy

M. J. Lipp and W. B. Daniels

Phys. Rev. Lett. 67, 2810 (1991) - Published 11 November, 1991

Ag(111) surface reconstruction studied by optical second-harmonic generation

Yeke Tang, L. J. Simpson, and T. E. Furtak

Phys. Rev. Lett. 67, 2814 (1991) - Published 11 November, 1991

Film/substrate registry as measured by anomalous x-ray scattering at a reacted, epitaxial Cu/Si(111) interface

F. J. Walker, E. D. Specht, and R. A. McKee

Phys. Rev. Lett. 67, 2818 (1991) - Published 11 November, 1991

Surface core-level shifts as a probe of the local overlayer structure: CO on Pd(100)

J. N. Andersen, M. Qvarford, R. Nyholm, S. L. Sorensen, and C. Wigren

Phys. Rev. Lett. 67, 2822 (1991) - Published 11 November, 1991

Suppression of three-dimensional island nucleation during GaAs growth on Si(100)

C.-H. Choi, R. Ai, and S. A. Barnett

Phys. Rev. Lett. 67, 2826 (1991) - Published 11 November, 1991

Evolution of vicinal Si(001) from double- to single-atomic-height steps with temperature

J. J. de Miguel, C. E. Aumann, R. Kariotis, and M. G. Lagally

Phys. Rev. Lett. 67, 2830 (1991) - Published 11 November, 1991

Sb trimer structure of the InSb(111)B-(2×2) surface as determined by transmission electron diffraction

Toshitaka Nakada and Toshiaki Osaka

Phys. Rev. Lett. 67, 2834 (1991) - Published 11 November, 1991

Condensed Matter: Electronic Properties, Etc.

Direct measurements of polymer depletion layers by neutron reflectivity

L. T. Lee, O. Guiselin, A. Lapp, B. Farnoux, and J. Penfold

Phys. Rev. Lett. 67, 2838 (1991) - Published 11 November, 1991

Sputtering of solid hydrogenic targets by keV hydrogen ions

Bjarne Stenum, Jørgen Schou, Ole Ellegaard, Hans Sørensen, and Roman Pedrys

Phys. Rev. Lett. 67, 2842 (1991) - Published 11 November, 1991

Poincaré sections of charge-density-wave dynamics: Mode locking

J. Levy and M. S. Sherwin

Phys. Rev. Lett. 67, 2846 (1991) - Published 11 November, 1991

Elimination of the inner-shell lifetime broadening in x-ray-absorption spectroscopy

K. Hämäläinen, D. P. Siddons, J. B. Hastings, and L. E. Berman

Phys. Rev. Lett. 67, 2850 (1991) - Published 11 November, 1991

Elementary excitations in alkali-metal overlayers probed by electron-energy-loss spectroscopy: Quantum-mechanical effects

J. A. Gaspar, A. G. Eguiluz, K.-D. Tsuei, and E. W. Plummer

Phys. Rev. Lett. 67, 2854 (1991) - Published 11 November, 1991

Electronic excitations in adsorbed alkali-metal layers

A. Liebsch

Phys. Rev. Lett. 67, 2858 (1991) - Published 11 November, 1991

Single-electron charging effects in insulating wires

Venkat Chandrasekhar, Zvi Ovadyahu, and Richard A. Webb

Phys. Rev. Lett. 67, 2862 (1991) - Published 11 November, 1991

Interacting and self-organized two-level states in tunnel barriers

L. Pesenson, R. P. Robertazzi, R. A. Buhrman, S. R. Cypher, and B. D. Hunt

Phys. Rev. Lett. 67, 2866 (1991) - Published 11 November, 1991

Resonant tunneling and hopping through a series of localized states in a two-dimensional electron gas

Dragana Popović, A. B. Fowler, and S. Washburn

Phys. Rev. Lett. 67, 2870 (1991) - Published 11 November, 1991

Gauge-invariant formulation of electron linear transport

Fernando Sols

Phys. Rev. Lett. 67, 2874 (1991) - Published 11 November, 1991

Effects of surface magnetism on optical second harmonic generation

J. Reif, J. C. Zink, C.-M. Schneider, and J. Kirschner

Phys. Rev. Lett. 67, 2878 (1991) - Published 11 November, 1991

Evidence for non-Fermi liquid behavior in the Kondo alloy $Y_{1 - x}$ $U_{x}$ ${Pd}_{3}$

C. L. Seaman, M. B. Maple, B. W. Lee, S. Ghamaty, M. S. Torikachvili, J.-S. Kang, L. Z. Liu, J. W. Allen, and D. L. Cox

Phys. Rev. Lett. 67, 2882 (1991) - Published 11 November, 1991

Observation of non-Fermi-liquid behavior in $U_{0.2}$ $Y_{0.8}$ ${Pd}_{3}$

B. Andraka and A. M. Tsvelik

Phys. Rev. Lett. 67, 2886 (1991) - Published 11 November, 1991

Observation of the Bloch oscillations in an ultrasmall Josephson junction

L. S. Kuzmin and D. B. Haviland

Phys. Rev. Lett. 67, 2890 (1991) - Published 11 November, 1991

Effect of random pinning sites on behavior in Josephson-junction arrays

Ying-Hong Li and S. Teitel

Phys. Rev. Lett. 67, 2894 (1991) - Published 11 November, 1991

Calculation of the transverse nuclear relaxation rate for ${YBa}_{2}$ ${Cu}_{3}$ $O_{7}$ in the superconducting state

N. Bulut and D. J. Scalapino

Phys. Rev. Lett. 67, 2898 (1991) - Published 11 November, 1991

Ce and Tb substitution for Y in ${YBa}_{2}$ ${Cu}_{3}$ $O_{7}$ thin films

C. R. Fincher, Jr. and Graciela B. Blanchet

Phys. Rev. Lett. 67, 2902 (1991) - Published 11 November, 1991

Dynamics of an excited electron in a cuprate antiferromagnet

G. A. Thomas, D. H. Rapkine, S. L. Cooper, S-W. Cheong, and A. S. Cooper

Phys. Rev. Lett. 67, 2906 (1991) - Published 11 November, 1991

Cross-Disciplinary Physics

New approach to high-resolution electron-energy-loss spectroscopy of polar materials: Studies of water and methanol adsorption on ultrathin MgO(100) films

Ming-Cheng Wu, Cesar A. Estrada, and D. Wayne Goodman

Phys. Rev. Lett. 67, 2910 (1991) - Published 11 November, 1991

COMMENTS

Colloid thermodynamics and isospectral graphs

George A. Baker, Jr.

Phys. Rev. Lett. 67, 2914 (1991) - Published 11 November, 1991

Duplantier replies

Bertrand Duplantier

Phys. Rev. Lett. 67, 2915 (1991) - Published 11 November, 1991

Comment on ‘‘Nature of coupled-mode contributions to hot-electron relaxation in semiconductors’’

Sankar Das Sarma and Victor Korenman

Phys. Rev. Lett. 67, 2916 (1991) - Published 11 November, 1991

Dharma-wardana replies

M. W. C. Dharma-wardana

Phys. Rev. Lett. 67, 2917 (1991) - Published 11 November, 1991

Comment on ‘‘Odd-parity singlet pairing in the positive-U Hubbard model’’

E. Dagotto, A. Kampf, and J. R. Schrieffer

Phys. Rev. Lett. 67, 2918 (1991) - Published 11 November, 1991

Scalettar, Singh, and Zhang reply

R. T. Scalettar, R. R. P. Singh, and S. Zhang

Phys. Rev. Lett. 67, 2919 (1991) - Published 11 November, 1991

ERRATA

Bounds on the Magnetic Moment of the $W$ Boson

Mark A. Samuel, G. Li, Nita Sinha, Rahul Sinha, and M. K. Sundaresan

Phys. Rev. Lett. 67, 2920 (1991) - Published 11 November, 1991