Volume 68, Issue 7

17 February 1992

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LETTERS

General Physics

Stochastic method for real-time path integrations

C. H. Mak

Phys. Rev. Lett. 68, 899 (1992) - Published 17 February, 1992

Elementary Particles and Fields

Exact Results for Supersymmetric $σ$ Models

S. Cecotti and Cumrun Vafa

Phys. Rev. Lett. 68, 903 (1992) - Published 17 February, 1992

Origin of the polarization for inclusive Λ production in pp collisions

Jacques Soffer and Nils A. Törnqvist

Phys. Rev. Lett. 68, 907 (1992) - Published 17 February, 1992

Atomic, Molecular, and Optical Physics

Ultrafast intrinsic optical switching in a dense medium of two-level atoms

M. E. Crenshaw, M. Scalora, and C. M. Bowden

Phys. Rev. Lett. 68, 911 (1992) - Published 17 February, 1992

Absolute cross sections for low-energy scattering of electrons by excited sodium

T. Y. Jiang, M. Zuo, L. Vuković, and B. Bederson

Phys. Rev. Lett. 68, 915 (1992) - Published 17 February, 1992

Location of the low-energy ${}^{1}$ $A_{g}$ state in a polythiophene oligomer by two-photon absorption spectroscopy: α-sexithienyl

N. Periasamy, R. Danieli, G. Ruani, R. Zamboni, and C. Taliani

Phys. Rev. Lett. 68, 919 (1992) - Published 17 February, 1992

Spatial solitons in photorefractive media

Mordechai Segev, Bruno Crosignani, Amnon Yariv, and Baruch Fischer

Phys. Rev. Lett. 68, 923 (1992) - Published 17 February, 1992

‘‘Atomic’’ determination of the ${}^{23}{Na}$ , ${}^{25}{Mg}$ , and ${}^{27}{Al}$ nuclear quadrupole moments: How accurate are the ‘‘muonic’’ values?

Dage Sundholm and Jeppe Olsen

Phys. Rev. Lett. 68, 927 (1992) - Published 17 February, 1992

Nonlinear Dynamics, Fluid Dynamics, Classical Optics, Etc.

Direct measurement of the optical Goos-Hänchen effect in lasers

Fabien Bretenaker, Albert Le Floch, and Laurent Dutriaux

Phys. Rev. Lett. 68, 931 (1992) - Published 17 February, 1992

Propagation rate of growing interfaces in stirred fluids

Alan R. Kerstein and Wm. T. Ashurst

Phys. Rev. Lett. 68, 934 (1992) - Published 17 February, 1992

Measuring the probability distribution of the relative velocities in grid-generated turbulence

H. K. Pak, W. I. Goldburg, and A. Sirivat

Phys. Rev. Lett. 68, 938 (1992) - Published 17 February, 1992

Plasma and Beam Physics

Evidence for whole-beam self-focusing of induced spatially incoherent laser light in large underdense plasma

T. Afshar-rad, L. A. Gizzi, M. Desselberger, F. Khattak, O. Willi, and A. Giulietti

Phys. Rev. Lett. 68, 942 (1992) - Published 17 February, 1992

Frequency upconversion of electromagnetic radiation upon transmission into an ionization front

R. L. Savage, Jr., C. Joshi, and W. B. Mori

Phys. Rev. Lett. 68, 946 (1992) - Published 17 February, 1992

Condensed Matter: Structure, Etc.

Finite-difference method for the calculation of low-energy-electron diffraction

Y. Joly

Phys. Rev. Lett. 68, 950 (1992) - Published 17 February, 1992

Local dimer exchange in surfactant-mediated epitaxial growth

R. M. Tromp and M. C. Reuter

Phys. Rev. Lett. 68, 954 (1992) - Published 17 February, 1992

Analytic model for a ballistic deposition process

J. Talbot and S. M. Ricci

Phys. Rev. Lett. 68, 958 (1992) - Published 17 February, 1992

Empirical relations between static and dynamic exponents for Ising model cluster algorithms

Paul D. Coddington and Clive F. Baillie

Phys. Rev. Lett. 68, 962 (1992) - Published 17 February, 1992

New type of self-organized criticality in a model of erosion

Hideki Takayasu and Hajime Inaoka

Phys. Rev. Lett. 68, 966 (1992) - Published 17 February, 1992

Evolution of surface and pore volume in compacted metal powders

O. Blaschko, R. Glas, G. Krexner, and P. Weinzierl

Phys. Rev. Lett. 68, 970 (1992) - Published 17 February, 1992

Interstitialcy model for condensed matter states of face-centered-cubic metals

A. V. Granato

Phys. Rev. Lett. 68, 974 (1992) - Published 17 February, 1992

Charge-state-dependent diffusion and carrier-emission-limited drift of iron in silicon

T. Heiser and A. Mesli

Phys. Rev. Lett. 68, 978 (1992) - Published 17 February, 1992

Orientation-dependent final-state effects in photoelectron spectra of physisorbed molecules

A. Nilsson, R. E. Palmer, H. Tillborg, B. Hernnäs, R. J. Guest, and N. Mårtensson

Phys. Rev. Lett. 68, 982 (1992) - Published 17 February, 1992

Condensed Matter: Electronic Properties, Etc.

One-dimensional ‘‘dislocation-related’’ electronic states at the GaAs(110)-Bi(1×1) interface

R. Compañó, U. del Pennino, and Carlo Mariani

Phys. Rev. Lett. 68, 986 (1992) - Published 17 February, 1992

Nonthermalized distribution of electrons on picosecond time scale in GaAs

D. W. Snoke, W. W. Rühle, Y.-C. Lu, and E. Bauser

Phys. Rev. Lett. 68, 990 (1992) - Published 17 February, 1992

Evolution of the optical functions of aluminum films during nucleation and growth determined by real-time spectroscopic ellipsometry

H. V. Nguyen, Ilsin An, and R. W. Collins

Phys. Rev. Lett. 68, 994 (1992) - Published 17 February, 1992

Dissipative quantum tunneling of a single microscopic defect in a mesoscopic metal

Brage Golding, M. Neil Zimmerman, and S. N. Coppersmith

Phys. Rev. Lett. 68, 998 (1992) - Published 17 February, 1992

Confined-to-propagating transition of LO phonons in GaAs/ ${Al}_{x}$ ${Ga}_{1 - x}$ As superlattices observed by picosecond Raman scattering

Dai-Sik Kim, Abdellatif Bouchalkha, J. M. Jacob, J. F. Zhou, J. J. Song, and J. F. Klem

Phys. Rev. Lett. 68, 1002 (1992) - Published 17 February, 1992

Giant excitonic resonance in time-resolved four-wave mixing in quantum wells

Dai-Sik Kim, Jagdeep Shah, J. E. Cunningham, T. C. Damen, Wilfried Schäfer, Michael Hartmann, and Stefan Schmitt-Rink

Phys. Rev. Lett. 68, 1006 (1992) - Published 17 February, 1992

Giant, triply resonant, third-order nonlinear susceptibility $χ_{3 ω}^{(3)}$ in coupled quantum wells

Carlo Sirtori, Federico Capasso, Deborah L. Sivco, and Alfred Y. Cho

Phys. Rev. Lett. 68, 1010 (1992) - Published 17 February, 1992

Pulsed laser-induced photochemical decomposition of GaAs(110) studied with time-resolved photoelectron spectroscopy using synchrotron radiation

J. P. Long, S. S. Goldenberg, and M. N. Kabler

Phys. Rev. Lett. 68, 1014 (1992) - Published 17 February, 1992

Nonlinear transport in mesoscopic systems

T. K. Ng

Phys. Rev. Lett. 68, 1018 (1992) - Published 17 February, 1992

Berry’s phase, motive forces, and mesoscopic conductivity

Ady Stern

Phys. Rev. Lett. 68, 1022 (1992) - Published 17 February, 1992

Crossover and order-disorder transition of two-dimensional quantum antiferromagnets at low temperatures

Takashi Yanagisawa

Phys. Rev. Lett. 68, 1026 (1992) - Published 17 February, 1992

Singlet ground state of the periodic Anderson model at half filling: A rigorous result

Kazuo Ueda, Hirokazu Tsunetsugu, and Manfred Sigrist

Phys. Rev. Lett. 68, 1030 (1992) - Published 17 February, 1992

Kondo resonance in $Y_{1 - x}$ $U_{x}$ ${Pd}_{3}$

L. Z. Liu, J. W. Allen, C. L. Seaman, M. B. Maple, Y. Dalichaouch, J.-S. Kang, M. S. Torikachvili, and M. A. Lopez de la Torre

Phys. Rev. Lett. 68, 1034 (1992) - Published 17 February, 1992

Spin fluctuation and local magnetism of isolated Rh ions in paramagnetic dilute PdFe alloys

Sanghamitra Khatua, S. N. Mishra, S. H. Devare, and H. G. Devare

Phys. Rev. Lett. 68, 1038 (1992) - Published 17 February, 1992

Lagrangian spin-wave theory of frustrated antiferromagnets: Application to ${ABX}_{3}$ compounds

M. L. Plumer and A. Caillé

Phys. Rev. Lett. 68, 1042 (1992) - Published 17 February, 1992

Exact critical theory of the two-impurity Kondo model

Ian Affleck and Andreas W. W. Ludwig

Phys. Rev. Lett. 68, 1046 (1992) - Published 17 February, 1992

Orientational Disorder and Electronic States in $C_{60}$ and $A_{3}$ $C_{60}$ , where A is an Alkali Metal

Martin P. Gelfand and Jian Ping Lu

Phys. Rev. Lett. 68, 1050 (1992) - Published 17 February, 1992

Electronic transport properties of $K_{3}$ $C_{60}$ films

T. T. M. Palstra, R. C. Haddon, A. F. Hebard, and J. Zaanen

Phys. Rev. Lett. 68, 1054 (1992) - Published 17 February, 1992

Isotope effect in superconducting ${Rb}_{3}$ $C_{60}$

A. P. Ramirez, A. R. Kortan, M. J. Rosseinsky, S. J. Duclos, A. M. Mujsce, R. C. Haddon, D. W. Murphy, A. V. Makhija, S. M. Zahurak, and K. B. Lyons

Phys. Rev. Lett. 68, 1058 (1992) - Published 17 February, 1992

Incommensurate magnetic correlations in ${La}_{1.8}$ ${Sr}_{0.2}$ ${NiO}_{4}$

S. M. Hayden, G. H. Lander, J. Zarestky, P. J. Brown, C. Stassis, P. Metcalf, and J. M. Honig

Phys. Rev. Lett. 68, 1061 (1992) - Published 17 February, 1992

1/f noise in ${YBa}_{2}$ ${Cu}_{3}$ $O_{7 - δ}$ superconducting bicrystal grain-boundary junctions

M. Kawasaki, P. Chaudhari, and A. Gupta

Phys. Rev. Lett. 68, 1065 (1992) - Published 17 February, 1992

Investigation of the superconducting order parameter in ${Bi}_{2}$ ${Sr}_{2}$ ${CaCu}_{2}$ $O_{8}$ single crystals

T. Staufer, R. Nemetschek, R. Hackl, P. Müller, and H. Veith

Phys. Rev. Lett. 68, 1069 (1992) - Published 17 February, 1992

Cross-Disciplinary Physics

Quasientrainment and slow relaxation in a population of oscillators with random and frustrated interactions

Hiroaki Daido

Phys. Rev. Lett. 68, 1073 (1992) - Published 17 February, 1992

Spontaneous fluctuation correlations in thermal lattice-gas automata

Patrick Grosfils, Jean-Pierre Boon, and Pierre Lallemand

Phys. Rev. Lett. 68, 1077 (1992) - Published 17 February, 1992

Ab initio description of counterion screening in colloidal suspensions

Hartmut Löwen, Paul A. Madden, and Jean-Pierre Hansen

Phys. Rev. Lett. 68, 1081 (1992) - Published 17 February, 1992

Phase transitions between ripple structures in hydrated phosphatidylcholine-cholesterol multilamellar assemblies

D. H. Wolfe, L. J. Lis, O. Kucuk, M. P. Westerman, B. A. Cunningham, S. B. Qadri, W. Bras, and P. J. Quinn

Phys. Rev. Lett. 68, 1085 (1992) - Published 17 February, 1992

COMMENTS

Comment on ‘‘Anomalous isotope effect and van Hove singularity in superconducting Cu oxides’’

R. Combescot

Phys. Rev. Lett. 68, 1089 (1992) - Published 17 February, 1992

Comment on ‘‘Anomalous isotope effect and van Hove singularity in superconducting Cu oxides’’

D. Y. Xing, M. Liu, and C. D. Gong

Phys. Rev. Lett. 68, 1090 (1992) - Published 17 February, 1992

Tsuei et al. reply

C. C. Tsuei, D. M. Newns, C. C. Chi, and P. C. Pattnaik

Phys. Rev. Lett. 68, 1091 (1992) - Published 17 February, 1992