• LETTERS
  • Gravitation and Astrophysics
  • Elementary Particles and Fields
  • Nuclear Physics
  • Atomic, Molecular, and Optical Physics
  • Plasma and Beam Physics
  • Condensed Matter: Structure, Etc.
  • Condensed Matter: Electronic Properties, Etc.
• COMMENTS
• ERRATA

•	Test of the inverse-square law of gravitation using the 300-m tower at Erie, Colorado C. C. Speake, T. M. Niebauer, M. P. McHugh, P. T. Keyser, J. E. Faller, J. Y. Cruz, J. C. Harrison, Jaako Mäkinen, and R. B. Beruff pp. 1967-1971 [View   PDF (751 kB) ]

•	Possible solution to the cosmological-constant problem Y. Jack Ng and H. van Dam pp. 1972-1974 [View   PDF (386 kB) ]

•	Possible solution to the discrepancy between the Homestake and Kamiokande solar-neutrino experiments M. Fukugita and T. Yanagida pp. 1975-1978 [View   PDF (592 kB) ]

•	New string partition functions with vanishing cosmological constant Keith R. Dienes pp. 1979-1982 [View   PDF (767 kB) ]

•	Euclidean continuation of the Dirac fermion Mayank R. Mehta pp. 1983-1986 [View   PDF (622 kB)  See Also: Erratum]

•	Role of the πN P11 interaction in πd elastic scattering at 50 MeV N. R. Stevenson et al. pp. 1987-1990 [View   PDF (613 kB) ]

•	Coulomb-distortion effects on spectroscopic strengths from the (e,e’p) reaction J. P. McDermott pp. 1991-1994 [View   PDF (568 kB) ]

•	Indirect x-ray line formation processes in highly charged barium P. Beiersdorfer, A. L. Osterheld, M. H. Chen, J. R. Henderson, D. A. Knapp, M. A. Levine, R. E. Marrs, K. J. Reed, M. B. Schneider, and D. A. Vogel pp. 1995-1998 [View   PDF (678 kB) ]

•	Route to chaos and competition between relaxation oscillations for a semiconductor laser with optical feedback J. Mørk, J. Mark, and B. Tromborg pp. 1999-2002 [View   PDF (673 kB) ]

•	Accurate ab initio calculation of scattering length and phase shifts at very low energies for electron-neon scattering H. P. Saha pp. 2003-2006 [View   PDF (654 kB) ]

•	Hydrodynamic motion of a heavy-ion-beam-heated plasma J. Jacoby, D. H. Hoffmann, R. W. Müller, K. Mahrt-Olt, R. C. Arnold, V. Schneider, and J. Maruhn pp. 2007-2010 [View   PDF (708 kB) ]

•	Force-free electromagnetic pulses in a laboratory plasma R. L. Stenzel and J. M. Urrutia pp. 2011-2014 [View   PDF (670 kB) ]

•	Superfluorescence and amplified spontaneous emission of 29-cm-1 phonons in ruby M. H. Overwijk, J. I. Dijkhuis, and H. W. de Wijn pp. 2015-2018 [View   PDF (645 kB) ]

•	Effect of plastic flow on the kinetics of amorphous phase growth by solid state reaction in the Ni-Zr system G. Mazzone, A. Montone, and M. Vittori Antisari pp. 2019-2022 [View   PDF (661 kB) ]

•	Copper in silicon R. Keller, M. Deicher, W. Pfeiffer, H. Skudlik, D. Steiner, and Th. Wichert pp. 2023-2026 [View   PDF (666 kB) ]

•	Oxygen chemisorption on Cu(110): A model for the c(6×2) structure R. Feidenhans’l, F. Grey, M. Nielsen, F. Besenbacher, F. Jensen, E. Laegsgaard, I. Stensgaard, K. W. Jacobsen, J. K. Nørskov, and R. L. Johnson pp. 2027-2030 [View   PDF (836 kB) ]

•	Korringa-Kohn-Rostoker spectral-band theory for general potentials Roger G. Newton pp. 2031-2034 [View   PDF (517 kB) ]

•	Nonadiabatic surface reaction: Mechanism of electron emission in the Cs+O2 system A. Böttcher, R. Imbeck, A. Morgante, and G. Ertl pp. 2035-2037 [View   PDF (515 kB) ]

•	Hyperthermal surface ionization of mercury from Pt(111) Albert Danon, Amichay Vardi, and Aviv Amirav pp. 2038-2041 [View   PDF (630 kB) ]

•	Spectral density for fermion tunneling between two centers in a metallic environment V. L. Líbero and L. N. Oliveira pp. 2042-2045 [View   PDF (695 kB) ]

•	Anion-antisite-like defects in III-V compounds M. J. Caldas, J. Dabrowski, A. Fazzio, and M. Scheffler pp. 2046-2049 [View   PDF (656 kB) ]

•	Vertical transport in semiconductor superlattices probed by miniband-to-acceptor magnetoluminescence B. J. Skromme, R. Bhat, M. A. Koza, S. A. Schwarz, T. S. Ravi, and D. M. Hwang pp. 2050-2053 [View   PDF (697 kB) ]

•	Magnetization reversal in ultrathin ferromagnetic films with perpendicular anistropy: Domain observations J. Pommier, P. Meyer, G. Pénissard, J. Ferré, P. Bruno, and D. Renard pp. 2054-2057 [View   PDF (702 kB) ]

•	Enhancement of the Curie temperature of epitaxial Fe films on W(110) caused by adsorption of submonolayers of Fe, Pd, Ag, and O W. Weber, D. Kerkmann, D. Pescia, D. A. Wesner, and G. Güntherodt pp. 2058-2061 [View   PDF (617 kB) ]

•	Anisotropic temperature dependence of the magnetic-field penetration in superconducting UPt3 C. Broholm, G. Aeppli, R. N. Kleiman, D. R. Harshman, D. J. Bishop, E. Bucher, D. Ll. Williams, E. J. Ansaldo, and R. H. Heffner pp. 2062-2065 [View   PDF (688 kB) ]

•	Critical fluctuations in high-temperature superconductors and the Ettingshausen effect Salman Ullah and Alan T. Dorsey pp. 2066-2069 [View   PDF (694 kB) ]

•	Parity violation and superconductivity in two-dimensional correlated electronic systems P. B. Wiegmann pp. 2070-2073 [View   PDF (698 kB) ]

•	Pinning forces and lower critical fields in YBa2Cu3Oy crystals: Temperature dependence and anisotropy Dong-Ho Wu and S. Sridhar pp. 2074-2077 [View   PDF (709 kB)  See Also: Erratum]

•	Comment on ‘‘Soft-pion theorems and a light-cone quark model’’ D. Drechsel and H. J. Weber pp. 2078 [View   PDF (184 kB) ]

•	Cao and Kisslinger reply Z-J. Cao and L. S. Kisslinger pp. 2079 [View   PDF (209 kB) ]

•	Comment on nonstatistical excited-state populations R. P. Schmitt pp. 2080 [View   PDF (129 kB) ]

•	Nayak and Lynch reply T. K. Nayak and W. G. Lynch pp. 2081 [View   PDF (187 kB) ]

•	Comment on ‘‘Invariance of the spectrum of light on propagation’’ Ad Lagendijk pp. 2082 [View   PDF (183 kB) ]

•	Exchange-correlation potentials in Schottky barriers and heterojunctions R. W. Godby, L. J. Sham, and M. Schlüter pp. 2083 [View   PDF (331 kB) ]

•	Das et al. reply G. P. Das, P. Blöchl, O. K. Andersen, N. E. Christensen, and O. Gunnarsson pp. 2084 [View   PDF (178 kB) ]

•	Erratum: Solution and hidden supersymmetry of a Dirac oscillator [Phys. Rev. Lett. 64, 1643 (1990)] J. Benítez, R. P. Martínez y Romero, H. N. Núñez-Yépez, and A. L. Salas-Brito pp. 2085 [View   PDF (73 kB) ]

•	Reductions of Self-Dual Yang-Mills Fields and Classical Systems S. Chakravarty, M. J. Ablowitz, and P. A. Clarkson pp. 2086 [View   PDF (39 kB) ]