Volume 72, Issue 14

4 April 1994

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LETTERS

General Physics

Stochastic resonance on a circle

Kurt Wiesenfeld, David Pierson, Eleni Pantazelou, Chris Dames, and Frank Moss

Phys. Rev. Lett. 72, 2125 (1994) - Published 4 April, 1994

Effective kink-kink interaction in a one-dimensional model mediated by phonon exchange

V. G. Rostiashvili and R. Schilling

Phys. Rev. Lett. 72, 2130 (1994) - Published 4 April, 1994

Elementary Particles and Fields

One-loop n-gluon amplitudes with maximal helicity violation via collinear limits

Zvi Bern, Gordon Chalmers, Lance Dixon, and David A. Kosower

Phys. Rev. Lett. 72, 2134 (1994) - Published 4 April, 1994

Search for the top quark in pp¯ collisions at √s =1.8 TeV

S. Abachi et al.

Phys. Rev. Lett. 72, 2138 (1994) - Published 4 April, 1994

Nuclear Physics

How to make large domains of disoriented chiral condensate

Sean Gavin, Andreas Gocksch, and Robert D. Pisarski

Phys. Rev. Lett. 72, 2143 (1994) - Published 4 April, 1994

Heavy-ion excitation of one- and two-phonon giant dipole states as an exit doorway phenomenon

L. F. Canto, A. Romanelli, M. S. Hussein, and A. F. R. de Toledo Piza

Phys. Rev. Lett. 72, 2147 (1994) - Published 4 April, 1994

Atomic, Molecular, and Optical Physics

A solution to the problem of variational collapse for the one-particle Dirac equation

Robert Nyden Hill and Carl Krauthauser

Phys. Rev. Lett. 72, 2151 (1994) - Published 4 April, 1994

Faraday effect as a probe of hindered electronic precession in atoms

M. Kristensen, M. A. van Eijkelenborg, and J. P. Woerdman

Phys. Rev. Lett. 72, 2155 (1994) - Published 4 April, 1994

Angular dependence of energy loss in proton-helium collisions

G. Schiwietz, P. L. Grande, C. Auth, H. Winter, and A. Salin

Phys. Rev. Lett. 72, 2159 (1994) - Published 4 April, 1994

Determination of complex ionization amplitudes by (e,2e) spectroscopy

N. L. S. Martin, D. B. Thompson, R. P. Bauman, and M. Wilson

Phys. Rev. Lett. 72, 2163 (1994) - Published 4 April, 1994

Core-penetrating Rydberg series of BaF: s∼p∼d∼f supercomplexes

Zygmunt J. Jakubek and Robert W. Field

Phys. Rev. Lett. 72, 2167 (1994) - Published 4 April, 1994

Is photon angular momentum conserved in a dielectric medium?

M. Kristensen and J. P. Woerdman

Phys. Rev. Lett. 72, 2171 (1994) - Published 4 April, 1994

Nonlinear Dynamics, Fluid Dynamics, Classical Optics, Etc.

Experiments on not ‘‘hearing the shape’’ of drums

S. Sridhar and A. Kudrolli

Phys. Rev. Lett. 72, 2175 (1994) - Published 4 April, 1994

Ultraslow optical dephasing in ${Eu}^{3 +}$ : $Y_{2}$ ${SiO}_{5}$

R. W. Equall, Y. Sun, R. L. Cone, and R. M. Macfarlane

Phys. Rev. Lett. 72, 2179 (1994) - Published 4 April, 1994

Resonant harmonic generation and dynamic screening in a double quantum well

J. N. Heyman, K. Craig, B. Galdrikian, M. S. Sherwin, K. Campman, P. F. Hopkins, S. Fafard, and A. C. Gossard

Phys. Rev. Lett. 72, 2183 (1994) - Published 4 April, 1994

Relaxation of 2D turbulence to a metaequilibrium near the minimum enstrophy state

X.-P. Huang and C. F. Driscoll

Phys. Rev. Lett. 72, 2187 (1994) - Published 4 April, 1994

Behavior of focus patterns in low Prandtl number convection

Yuchou Hu, Robert E. Ecke, and Guenter Ahlers

Phys. Rev. Lett. 72, 2191 (1994) - Published 4 April, 1994

Plasma and Beam Physics

Nonlinear resonances and chaotic behavior in a periodically focused intense charged-particle beam

Chiping Chen and Ronald C. Davidson

Phys. Rev. Lett. 72, 2195 (1994) - Published 4 April, 1994

Rotation characteristics of main ions and impurity ions in H-mode tokamak plasma

J. Kim, K. H. Burrell, P. Gohil, R. J. Groebner, Y.-B. Kim, H. E. St. John, R. P. Seraydarian, and M. R. Wade

Phys. Rev. Lett. 72, 2199 (1994) - Published 4 April, 1994

Condensed Matter: Structure, Etc.

Hysteresis and return-point memory in deterministic cellular automata

Jürgen Goicoechea and Jordi Ortín

Phys. Rev. Lett. 72, 2203 (1994) - Published 4 April, 1994

Study of phase separation of a binary fluid mixture in confined geometry

M. Y. Lin, S. K. Sinha, J. M. Drake, X.-l. Wu, P. Thiyagarajan, and H. B. Stanley

Phys. Rev. Lett. 72, 2207 (1994) - Published 4 April, 1994

Prediction of an expanded-to-condensed transition in colloidal crystals

Peter Bolhuis and Daan Frenkel

Phys. Rev. Lett. 72, 2211 (1994) - Published 4 April, 1994

Quantum prewetting transitions in liquid ${}^{3}{He}$

L. Pricaupenko and J. Treiner

Phys. Rev. Lett. 72, 2215 (1994) - Published 4 April, 1994

Shear induced hexagonal ordering observed in an ionic viscoelastic fluid in flow past a surface

W. A. Hamilton, P. D. Butler, S. M. Baker, G. S. Smith, John B. Hayter, L. J. Magid, and R. Pynn

Phys. Rev. Lett. 72, 2219 (1994) - Published 4 April, 1994

Local analysis of the dynamics of the relaxed and reconstructed Au(511) surface using the real space Green’s function method

A. Kara, C. S. Jayanthi, S. Y. Wu, and F. Ercolessi

Phys. Rev. Lett. 72, 2223 (1994) - Published 4 April, 1994

Metallization and incomplete melting of a semiconductor surface at high temperature

Noboru Takeuchi, A. Selloni, and E. Tosatti

Phys. Rev. Lett. 72, 2227 (1994) - Published 4 April, 1994

Condensed Matter: Electronic Properties, Etc.

Copper acceptors in uniaxially stressed germanium: 1 $s^{3}$ to 1 $s^{2}$ 2 $s^{1}$ ground-state transformation

O. D. Dubon, J. W. Beeman, L. M. Falicov, H. D. Fuchs, E. E. Haller, and C. Wang

Phys. Rev. Lett. 72, 2231 (1994) - Published 4 April, 1994

Coulomb effects in transport properties of quantum wires

M. Fabrizio, A. O. Gogolin, and S. Scheidl

Phys. Rev. Lett. 72, 2235 (1994) - Published 4 April, 1994

Weak localization of charged quantum particles in a disordered system subject to a strongly fluctuating magnetic field

A. G. Aronov and P. Wölfle

Phys. Rev. Lett. 72, 2239 (1994) - Published 4 April, 1994

Two-dimensional localization of electrons at interfaces

R. L. Lingle, Jr., D. F. Padowitz, R. E. Jordan, J. D. McNeill, and C. B. Harris

Phys. Rev. Lett. 72, 2243 (1994) - Published 4 April, 1994

Fe-induced magnetization of Pd: The role of modified Pd surface states

O. Rader, E. Vescovo, J. Redinger, S. Blügel, C. Carbone, W. Eberhardt, and W. Gudat

Phys. Rev. Lett. 72, 2247 (1994) - Published 4 April, 1994

Quantized conductance in an atom-sized point contact

L. Olesen, E. Laegsgaard, I. Stensgaard, F. Besenbacher, J. Schio/tz, P. Stoltze, K. W. Jacobsen, and J. K. No/rskov

Phys. Rev. Lett. 72, 2251 (1994) - Published 4 April, 1994

Nonlinear conductivity of a Wigner crystal in a strong magnetic field

Xuejun Zhu, P. B. Littlewood, and A. J. Millis

Phys. Rev. Lett. 72, 2255 (1994) - Published 4 April, 1994

Hall effect in ${YBa}_{2}$ ${Cu}_{3}$ $O_{7 - δ}$ in the limit of free flux flow

Milind N. Kunchur, David K. Christen, Charles E. Klabunde, and Julia M. Phillips

Phys. Rev. Lett. 72, 2259 (1994) - Published 4 April, 1994

Anisotropic penetration depth in ${La}_{2 - x}$ ${Sr}_{x}$ ${CuO}_{4}$

T. Shibauchi, H. Kitano, K. Uchinokura, A. Maeda, T. Kimura, and K. Kishio

Phys. Rev. Lett. 72, 2263 (1994) - Published 4 April, 1994

Observation of Josephson pair tunneling between a high- $T_{c}$ cuprate ( ${YBa}_{2}$ ${Cu}_{3}$ $O_{7 - δ}$ ) and a conventional superconductor (Pb)

A. G. Sun, D. A. Gajewski, M. B. Maple, and R. C. Dynes

Phys. Rev. Lett. 72, 2267 (1994) - Published 4 April, 1994

Flux line matching effects in ${YBa}_{2}$ ${Cu}_{3}$ $O_{7 - x}$ thin films

C. Hünnekes, H. G. Bohn, W. Schilling, and H. Schulz

Phys. Rev. Lett. 72, 2271 (1994) - Published 4 April, 1994

Strong nonlinear galvanomagnetic effects in thin superconducting films

Anatoly Kuklov, Alexei Bulatov, and Joseph L. Birman

Phys. Rev. Lett. 72, 2274 (1994) - Published 4 April, 1994

Andreev reflections on heavy-fermion superconductors

Y. De Wilde, J. Heil, A. G. M. Jansen, P. Wyder, R. Deltour, W. Assmus, A. Menovsky, W. Sun, and L. Taillefer

Phys. Rev. Lett. 72, 2278 (1994) - Published 4 April, 1994

Local octahedral tilts in ${La}_{2 - x}$ ${Ba}_{x}$ ${CuO}_{4}$ : Evidence for a new structural length scale

S. J. L. Billinge, G. H. Kwei, and H. Takagi

Phys. Rev. Lett. 72, 2282 (1994) - Published 4 April, 1994

Spin-glass model with dimension-dependent ground state multiplicity

C. M. Newman and D. L. Stein

Phys. Rev. Lett. 72, 2286 (1994) - Published 4 April, 1994

Spin-glass behavior of amorphous ${Co}_{2}$ Ge synthesized by mechanical milling

G. F. Zhou and H. Bakker

Phys. Rev. Lett. 72, 2290 (1994) - Published 4 April, 1994

Cross-Disciplinary Physics

One-dimensional patterns and wavelength selection in magnetic fluids

Denis Wirtz and Marc Fermigier

Phys. Rev. Lett. 72, 2294 (1994) - Published 4 April, 1994

Liquid properties of embryonic tissues: Measurement of interfacial tensions

Ramsey A. Foty, Gabor Forgacs, Cathie M. Pfleger, and Malcolm S. Steinberg

Phys. Rev. Lett. 72, 2298 (1994) - Published 4 April, 1994

COMMENTS

Comment on ‘‘Cohesion in aluminum systems: A first-principles assessment of ‘glue’ schemes’’

U. Yxklinten, Y. Andersson, and B. I. Lundqvist

Phys. Rev. Lett. 72, 2302 (1994) - Published 4 April, 1994

Robertson, Heine, and Payne reply

I. J. Robertson, V. Heine, and M. C. Payne

Phys. Rev. Lett. 72, 2303 (1994) - Published 4 April, 1994

Determination of the mean-field stability temperature in polymer blends

Robert Hołyst

Phys. Rev. Lett. 72, 2304 (1994) - Published 4 April, 1994

Bates, Wiltzius, and Fredrickson reply

Frank S. Bates, Pierre Wiltzius, and Glenn H. Fredrickson

Phys. Rev. Lett. 72, 2305 (1994) - Published 4 April, 1994

Power laws without parameter tuning: An alternative to self-organized criticality

Didier Sornette

Phys. Rev. Lett. 72, 2306 (1994) - Published 4 April, 1994

Cannelli, Cantelli, and Cordero reply

G. Cannelli, R. Cantelli, and F. Cordero

Phys. Rev. Lett. 72, 2307 (1994) - Published 4 April, 1994

Comment on ‘‘Direct observation of an organic superlattice structure’’

S. R. Forrest and P. E. Burrows

Phys. Rev. Lett. 72, 2308 (1994) - Published 4 April, 1994

Imanishi and Kakuta reply

Y. Imanishi and A. Kakuta

Phys. Rev. Lett. 72, 2309 (1994) - Published 4 April, 1994