• LETTERS
  • General Physics
  • Nuclear Physics
  • Atomic, Molecular, and Optical Physics
  • Plasma and Beam Physics
  • Condensed Matter: Structure, Etc.
  • Condensed Matter: Electronic Properties, Etc.
  • Cross-Disciplinary Physics
• COMMENTS
• ERRATA

•	Ground state instability of a random system Yi-Cheng Zhang pp. 2125-2128 [View   PDF (547 kB) ]

•	Bistability driven by weakly colored Gaussian noise: The Fokker-Planck boundary layer and mean first-passage times Charles R. Doering, Patrick S. Hagan, and C. David Levermore pp. 2129-2132 [View   PDF (635 kB) ]

•	Optical analog of a kicked quantum oscillator Joachim Krug pp. 2133-2136 [View   PDF (525 kB) ]

•	Naked singularities in self-similar spherical gravitational collapse Amos Ori and Tsvi Piran pp. 2137-2140 [View   PDF (507 kB) ]

•

Intrinsic quadrupole moment of the superdeformed band in 152Dy M. A. Bentley, G. C. Ball, H. W. Cranmer-Gordon, P. D. Forsyth, D. Howe, A. R. Mokhtar, J. D. Morrison, J. F. Sharpey-Schafer, P. J. Twin, B. Fant, C. A. Kalfas, A. H. Nelson, J. Simpson, and G. Sletten pp. 2141-2144 [View   PDF (589 kB) ]

•	Nonlinear nonreciprocity and directional bistability in a ring resonator with a quadratic nonlinear medium A. Gasch and D. Jäger pp. 2145-2148 [View   PDF (599 kB) ]

•	Transient spectra of strong-field resonance fluorescence J. E. Golub and T. W. Mossberg pp. 2149-2152 [View   PDF (617 kB) ]

•	Squeezed-light–enhanced polarization interferometer P. Grangier, R. E. Slusher, B. Yurke, and A. LaPorta pp. 2153-2156 [View   PDF (576 kB) ]

•	Demonstration of soft x-ray amplification in nickel-like ions B. J. MacGowan, S. Maxon, P. L. Hagelstein, C. J. Keane, R. A. London, D. L. Matthews, M. D. Rosen, J. H. Scofield, and D. A. Whelan pp. 2157-2160 [View   PDF (597 kB) ]

•	Laser amplification at 18.2 nm in recombining plasma from a laser-irradiated carbon fiber C. Chenais-Popovics, R. Corbett, C. J. Hooker, M. H. Key, G. P. Kiehn, C. L. Lewis, G. J. Pert, C. Regan, S. J. Rose, S. Sadaat, R. Smith, T. Tomie, and and O. Willi pp. 2161-2164 [View   PDF (571 kB) ]

•	Steady-state tokamak discharge via dc helicity injection M. Ono, G. J. Greene, D. Darrow, C. Forest, H. Park, and T. H. Stix pp. 2165-2168 [View   PDF (647 kB) ]

•	Tunneling images of biatomic steps on Si(001) P. E. Wierenga, J. A. Kubby, and J. E. Griffith pp. 2169-2172 [View   PDF (716 kB) ]

•	Reconstruction of steps on the Si(111)2×1 surface R. M. Feenstra and Joseph A. Stroscio pp. 2173-2176 [View   PDF (997 kB) ]

•	Direct imaging of surface reconstructions on CdTe by high-resolution electron microscopy Ping Lu and David J. Smith pp. 2177-2179 [View   PDF (712 kB) ]

•	Location of atoms in the first monolayer of GaAs on Si J. R. Patel, P. E. Freeland, M. S. Hybertsen, D. C. Jacobson, and J. A. Golovchenko pp. 2180-2183 [View   PDF (617 kB) ]

•	Finite-density Onsager-type theory for the isotropic-nematic transition of hard ellipsoids Marc Baus, Jean-Louis Colot, Xiao-Guang Wu, and Hong Xu pp. 2184-2187 [View   PDF (570 kB) ]

•	Commensurability effects and modulated structures in polyanilines Han-Yong Choi and E. J. Mele pp. 2188-2191 [View   PDF (672 kB) ]

•	Grazing incidence x-ray study of the structures and phase transitions of hydrogen on tungsten (100) J. W. Chung, K. Evans-Lutterodt, E. D. Specht, R. J. Birgeneau, P. J. Estrup, and A. R. Kortan pp. 2192-2195 [View   PDF (605 kB) ]

•	Recursive computation of many-phonon densities of states Raffaele Guido Della Valle and Gianni Cardini pp. 2196-2198 [View   PDF (385 kB) ]

•	Distribution of barrier heights in amorphous organic materials W. Köhler and J. Friedrich pp. 2199-2202 [View   PDF (540 kB) ]

•	Explosive crystallization starting from an amorphous-silicon surface region during long pulsed-laser irradiation Kouichi Murakami, Osamu Eryu, Koki Takita, and Kohzoh Masuda pp. 2203-2206 [View   PDF (643 kB) ]

•	Lattice theory of crystal surface melting A. Trayanov and E. Tosatti pp. 2207-2210 [View   PDF (554 kB) ]

•	Cubic anharmonicity and strong sidebands: An experimental test for vibrational phase relaxation at surfaces? Z. Y. Zhang and David C. Langreth pp. 2211-2214 [View   PDF (628 kB) ]

•	Mechanism of ion desorption by electronic transitions: A density-functional study Ph. Avouris, R. Kawai, N. D. Lang, and D. M. Newns pp. 2215-2218 [View   PDF (670 kB) ]

•	Optical measurements on oriented thin YBa2Cu3O7-δ films: Lack of evidence for excitonic superconductivity I. Bozovic, D. Kirillov, A. Kapitulnik, K. Char, M. R. Hahn, M. R. Beasley, T. H. Geballe, Y. H. Kim, and A. J. Heeger pp. 2219-2221 [View   PDF (495 kB) ]

•	Determination of intervalley scattering rates in GaAs by subpicosecond luminescence spectroscopy Jagdeep Shah, Benoit Deveaud, T. C. Damen, W. T. Tsang, A. C. Gossard, and P. Lugli pp. 2222-2225 [View   PDF (663 kB) ]

•	New method to study the proximity effect at the normal-metal–superconductor interface P. C. van Son, H. van Kempen, and P. Wyder pp. 2226-2228 [View   PDF (514 kB) ]

•	Generalization of back-propagation to recurrent neural networks Fernando J. Pineda pp. 2229-2232 [View   PDF (637 kB) ]

•	Comments on skyrmion mass calculation in the gauged chiral model T. N. Pham pp. 2233 [View   PDF (147 kB) ]

•	Zahed replies I. Zahed pp. 2234 [View   PDF (96 kB) ]

•	Lacombe et al. reply M. Lacombe, B. Loiseau, R. Vinh Mau, and W. N. Cottingham pp. 2235 [View   PDF (91 kB) ]

•	Comment on ‘‘Synchrotron x-ray study of a Fibonacci superlattice’’ J. G. Gay and B. M. Clemens pp. 2236 [View   PDF (129 kB) ]

•	Clarke and Merlin reply Roy Clarke and R. Merlin pp. 2237 [View   PDF (134 kB) ]

•	Comment on ‘‘Ionization energies of valence levels in physisorbed rare-gas multilayers’’ G. Kaindl and T. Mandel pp. 2238 [View   PDF (158 kB) ]

•	X-Ray Diffraction Study of Phason Strain Field in Oriented Icosahedral Al-Mn J. D. Budai, J. Z. Tischler, A. Habenschuss, G. E. Ice, and V. Elser pp. 2239 [View   PDF (33 kB) ]