Physical Review Letters – 23 June 1986
Volume 56, Issue 25

LETTERS
COMMENTS
ERRATA

LETTERS

Elementary Particles and Fields

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Comparison of an Exact Fermion Monte Carlo Algorithm with the Pseudofermion Method Using Staggered Fermions

R. V. Gavai and A. Gocksch

pp. 2659-2663 [View Page Images or PDF (938 kB)]

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String Propagation in a Tachyon Background

Sumit R. Das and B. Sathiapalan

pp. 2664-2667 [View Page Images or PDF (714 kB)]

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Limitations of Heterotic-Superstring Phenomenology

Harry W. Braden, Paul H. Frampton, Thomas W. Kephart, and Abhijit K. Kshirsagar

pp. 2668-2671 [View Page Images or PDF (889 kB)]

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Search for Light Short-Lived Particles in Radiative Upsilon Decays

G. Mageras, P. Franzini, P. M. Tuts, S. Youssef, T. Zhao, J. Lee-Franzini, and R. D. Schamberger

pp. 2672-2675 [View Page Images or PDF (758 kB)]

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Upper Limits for the Production of Light Short-Lived Neutral Particles in Radiative ϒ decay

T. Bowcock et al.

pp. 2676-2679 [View Page Images or PDF (643 kB)]

Nuclei

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Coexistence of Prolate and Oblate Structures up to Spin 40ℏ in ¹⁵²Dy

B. M. Nyakó, J. Simpson, P. J. Twin, D. Howe, P. D. Forsyth, and J. F. Sharpey-Schafer

pp. 2680-2683 [View Page Images or PDF (841 kB)]

Fundamental Phenomenology and Applications

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Linear and Nonlinear Theory of Cherenkov Maser Operation in the Intense Relativistic Beam Regime

Don S. Lemons and Lester E. Thode

pp. 2684-2687 [View Page Images or PDF (816 kB)]

Fluids, Plasmas, and Electric Discharges

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Nonlinear Reflection and Refraction of Planar Ion-Acoustic Plasma Solitons

T. Nagasawa and Y. Nishida

pp. 2688-2691 [View Page Images or PDF (797 kB)]

Condensed Matter: Structure, Etc.

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Thermodynamic Criteria for Grain-Boundary Melting: A Molecular-Dynamics Study

J. Q. Broughton and G. H. Gilmer

pp. 2692-2695 [View Page Images or PDF (693 kB)]

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Vibrational Anomalies Are Not Generally Due to Fractal Geometry: Comments on Proteins

J. A. Krumhansl

pp. 2696-2699 [View Page Images or PDF (870 kB)]

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Observation of a Magnetic Antiphase Domain Structure with Long-Range Order in a Synthetic Gd-Y Superlattice

C. F. Majkrzak, J. W. Cable, J. Kwo, M. Hong, D. B. McWhan, Y. Yafet, J. V. Waszczak, and C. Vettier

pp. 2700-2703 [View Page Images or PDF (852 kB)]

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Observation of Two Length Scales for the Critical Fluctuations of RbCaF₃

T. W. Ryan, R. J. Nelmes, R. A. Cowley, and A. Gibaud

pp. 2704-2707 [View Page Images or PDF (791 kB)]

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Rate-Theory Model of Polymer Crystallization

D. M. Sadler and G. H. Gilmer

pp. 2708-2711 [View Page Images or PDF (763 kB)]

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Asymmetric Melting and Freezing Kinetics in Silicon

Jeff Y. Tsao, Michael J. Aziz, Michael O. Thompson, and Paul S. Peercy

pp. 2712-2715 [View Page Images or PDF (958 kB)]

Condensed Matter: Electronic Properties, Etc.

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Cooperative Ring Exchange and the Fractional Quantized Hall Effect in an Incompressible Fluid

G. Baskaran

pp. 2716-2719 [View Page Images or PDF (1,061 kB)]

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New Method to Calculate the Muon Polarization Function

M. Celio

pp. 2720-2723 [View Page Images or PDF (715 kB)]

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Electron Mass Tunneling along the Growth Direction of (Al,Ga) As/GaAs Semiconductor Superlattices

T. Duffield, R. Bhat, M. Koza, F. DeRosa, D. M. Hwang, P. Grabbe, and S. J. Allen, Jr.

pp. 2724-2727 [View Page Images or PDF (902 kB)]

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Spin Anisotropy of Ferromagnetic Films

J. G. Gay and Roy Richter

pp. 2728-2731 [View Page Images or PDF (808 kB)]

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Enhanced Superconductivity in Quasi Two-Dimensional Systems

J. E. Hirsch and D. J. Scalapino

pp. 2732-2735 [View Page Images or PDF (728 kB)]

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Negative Absolute Mobility of Minority Electrons in GaAs Quantum Wells

Ralph A. Höpfel, Jagdeep Shah, Peter A. Wolff, and Arthur C. Gossard

pp. 2736-2739 [View Page Images or PDF (903 kB)]

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Electronic States on a Penrose Lattice

Mahito Kohmoto and Bill Sutherland

pp. 2740-2743 [View Page Images or PDF (919 kB)]

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Towards a Self-Consistent Determination of the Mixing Parameters in the Anderson Model: An Application to the 4f-Excitation Spectra of YbP

R. Monnier, L. Degiorgi, and D. D. Koelling

pp. 2744-2747 [View Page Images or PDF (921 kB)]

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"Dressed Excitons" in a Multiple-Quantum-Well Structure: Evidence for an Optical Stark Effect with Femtosecond Response Time

A. Mysyrowicz, D. Hulin, A. Antonetti, A. Migus, W. T. Masselink, and H. Morkoç

pp. 2748-2751 [View Page Images or PDF (777 kB)]

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Nonreciprocal Optical Reflection of the Uniaxial Antiferromagnet MnF₂

L. Remer, B. Lüthi, H. Sauer, R. Geick, and R. E. Camley

pp. 2752-2754 [View Page Images or PDF (607 kB)]

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Band Lineups at II-VI Heterojunctions: Failure of the Common-Anion Rule

J. Tersoff

pp. 2755-2758 [View Page Images or PDF (908 kB)]

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Work Function of Transition-Metal Surface with Submonolayer Alkali-Metal Coverage

Wang Ning, Chen Kailai, and Wang Dingsheng

pp. 2759-2762 [View Page Images or PDF (850 kB)]

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Realization of a Witten Critical Theory in (CH₃)₄NMnCl₃

Ian Affleck

pp. 2763-2766 [View Page Images or PDF (820 kB)]

COMMENTS

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Energy-Level Statistics of Integrable Quantum Systems

T. H. Seligman and J. J. M. Verbaarschot

pp. 2767 [View Page Images or PDF (224 kB)]

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Casati, Chirikov, and Guarneri Respond

G. Casati, B. V. Chirikov, and I. Guarneri

pp. 2768 [View Page Images or PDF (97 kB)]

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Comment on "Fractal Structure of TiH₂ Aggregates in a CuTi Matrix"

M. Kolb

pp. 2769 [View Page Images or PDF (245 kB)]

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Dependence of Superconducting Transition Temperature on Pressure in Primitive Hexagonal Si

David Erskine and Peter Y. Yu

pp. 2770 [View Page Images or PDF (238 kB)]