Brief Scientific History  Brief Scientific History

Full CV  Full CV

Research Highlights  Research Highlights

Books, Workshops, Panel Reports  Books, Workshops, Panel Reports

Previous Students and Postdocs  Previous Students and Postdocs

Previous Students and Postdocs  Present Research Group

Brief Scientific History  EliashMEM Program

Affiliated Research Centers and Groups  Institute for Advanced Materials

Professor Ward Plummer
229-C Nicholson Hall, Tower Dr.
Dept. of Physics & Astronomy
Louisiana State University
Baton Rouge, LA 70803-4001
Phone: (225) 578-3300
Fax: (225) 578-5855

EWP Home Page

  • Surfaces of transition metal Compounds: Effect of broken Symmetry

    • “Role of Antiferromagnetic Ordering in the (1×2) Surface Reconstruction of Ca(Fe1-xCox)2As2,” Phys. Rev. Letters, 112, 077205 (2014).
      [summary] [paper]

    • “Atomic-Scale Fingerprint of Mn Dopant at the Surface of Sr3(Ru1-xMnx)O7,” Nature Scientific Reports, 3, 1 (2013).
      [summary] [paper]

    • "Marriage of Spin and Lattice by the Minister of Charge," Proceedings of the National Academy of Sciences, 110, 898 (2013).
      [summary]  [paper]

    • "Coupled structural and magnetic antiphase domain walls: Atomic Picture of Spain Chirality," paper4Phys. Rev. B 86, 060512(R) (2012).
      [summary]  [paper]

    • "Nanoscale Chemical Phase Separation in an Fe based superconductor," Phys. Rev. B 83, 220502 (2011).
      [hightlight]  [paper]

    • "Surface-Stabilized Non-Ferromagnetic Ordering of a Layered Fermomagnetic Manganite," Phys. Rev. Lett. 103, 227201 (2009).

    • "Tunable Metalicity at the Surface," Phys. Rev. Lett. 102, 66104 (2009).
      [highlight]  [paper]

    • "A Surface-Tailored Purely Electronic Mott Metal-to-Insulator Transition" - Science, Volume 318, October 26, 2007
      [abstract] [paper]

    • "An Inherent Mott Insulator-to-Metal Transition," Science 318, 615 (2007).
      [NSF nugget]  [paper]

    • "Surface Phases of a p-Wave Superconductor," Science 289, 746 (2000).


  • Surface Phase Transitions in Conventional Materials

    • "Nanoscale Inhomogeneities and Fluctuaitons in a Phase Transition of a Surface Quasi-One-Dimensional System," Phys. Rev. Lett. 95, 116103 (2005).

    • "Intertwined Electronic and Structural Phase Transitions," Phys. Rev. Lett. 95, 046102 (2005).

    • "Defect-Mediated Charge Density Wave, " Science 285, 2107-2110 (1999).

    • "Surface Charge Density Wave Transition," Nature 381, 398 (1996).
      [cover] [paper]

    • "Semiconductor-to-Metal Transition in an Ultrathin Interface," Phys. Rev. Lett. 65, 2117 (1990).


  • Manifestations of Spatial Confinement

    • "Coulomb Blockade Behavior in a Quasi-Zerp Dimensional Quantum Well," Proceedings of the National Academy of Sciences 107, 14968 (2010).
      [hightlight] [paper]

    • "Time-Resolved Electronic Phase Transitions," Phys. Rev. Lett. 102, 087201 (2009).
      [highlight] [paper]

    • "Reemergent Metal-Insulator Transitions," Phys. Rev. Lett. 100, 247204 (2008).

    • "Giant Discrete Steps in Metal-Insulator Transition in Wires," Phys. Rev. Lett. 97, 167201 (2006).




  • Surface States on Metal Surfaces and Electron-Phonon Coupling

    • "Determination of electron-phonon coupling matrix element," Phys. Rev. Letts. 105, 256402 (2010).

    • "Anisotropic Electron-Phonon Coupling for an isotropic surface state," Physical Review B 80, 241416(R) (2009).

    • "Extraction of the Eliashberg Function for Electron-Phonon Coupling for a Surface State," Phys. Rev. Lett. 92, 186401 (2004).

    • "An Angle-Resolved Photoemission Investigation of the Surface states of Be," Phys. Rev. B 32, 1921 (1985).

    • "A new look at the Surface Photoelectric Effect," Phys. Rev. Lett. 43, 952 (1997).
      [summary]  [paper].

    • "Magnetic Surface States on Ni(100)," Phys. Rev. B 20, 1444 (1979).

    • "The first spectroscopic Identification of a surface state," Phys. Rev. Lett. 25, 1493 (1970).
      [summary]  [paper].


  • Surface Plasmons

    • Review article: “Foundations of Plasmonics,”  Y. Wang, E. W. Plummer, and K. Kempa, Advances in Physics, 60, 799 (2011).

    • "Normal Modes at the Surface of Simple Metals," Surf. Sci. 247, 302 (1991).

    • "The Multipole Plasmon Mode," Phys. Rev. Lett. 64, 44 (1990).

    • "Surface Plasmon Dispersion in Simple Metals," Phys. Rev. Lett. 63, 2256 (1989).

    • "Electron-Plasmon Interaction," Phys. Rev. Lett. 52, 2172 (1984).


  • Brief Highlights

  • Enhanced Electron-phonon Coupling at Metal Surfaces
  • - NSF Nugget in 2003 [.pdf file]
    - Direct Extraction of the Eliashberg Function from High-Resolution Photoemission Data [.pdf file]

  • Defect Blurred two-dimensional Phase Transtions
    -An Atomic View of the role of Defects in 2D phase transitions, NSF Nugget in 2000 [.pdf file]
    -Summary of Anatoli Melechko’s thesis, 2001 [.pdf file]
    -Role of defects in reduced dimensional systems, NSF Nugget 2002 [.pdf file]

  • Magnetism in Confined Dimensionality
    -Low Dimensional Magnetic Nanostructures, NSF Nugget in 2002 [.pdf file]
    -Top Papers 2003 Showcase, IOP Publishing, 2003 [.pdf file]
    -Tailored Magnetic Nanostructures on Surfaces [.pdf file]

  • Surface phases of Transition Metal Oxides
    -An Unusual Surface Mott Insulator-to-metal Transition, NSF Nugget in 2003 [.pdf file]
    -Surface Phase Transitions of Layered Perovskite Ca2-xSrxRuO4, Outstanding Poster at 2003 MRS Meeting [.pdf file]
    -Surface Structure of Layered Perovskites: A LEED I-V Study [.pdf file]
    -The Surface Phases of the p-wave Superconductor Sr2RuO4, ORNL Highlight [.pdf file]
    -Surface Lattice Dynamics of Single-Layered TMOs, ORNL Highlight [.pdf file]
    -An Inherent Mott Transition at a Surface: Ca1.9Sr0.1RuO4, NSF Nugget 2007 [.pdf file]

  • Neutron Scattering from Transition Metal Oxides
    -Dynamic Nano-Phase Fluctuations in CMR Materials—Jahn-Teller Phonon Anomaly, NSF Nugget 2001 [.pdf file]
    -Jahn-Teller Phonon Anomaly and Phase Inhomogeneities in La0.7Ca0.3MnO3, ORNL Highlight in 2003 [.pdf file]

  • Anomalous Thermal Expansion (Contraction) at Metal Surfaces
    -Surface Thermal Expansion, ORNL Highlight in 2003 [.pdf file]

  • Tuning the 2-Dimensional Surface Femi Contour by Alloying

  • Looking at electronic Waves in 2-Dimensions: Fourier-transform Scanning Tunneling Microscopy

Dr. Jian Shen
(back row, far left) has won a Presidential Early Career Award for Scientists and Engineers. He was honored September 9, 2004, at an awards ceremony in Washington DC. The PECASE Awards, as they are known, are the nation's highest honor for professionals at the outset of their independent research careers. Established in 1996, the awards honor the most promising beginning researchers in the United States in their respective fields. Eight federal departments and agencies annually nominate scientists and engineers at the start of their careers whose work shows the greatest promise to benefit the nominating agency's mission. Participating agencies award these beginning scientists and engineers up to five years of funding to further their research in support of critical government missions. Dr. Shen has teamed up with Dr. Plummer's group on projects including Tailored Magnetic Nanostructures on Surfaces and Low Dimensional Magnetic Nanostructures.

Research funded by the U.S. Department of Energy and the National Science Foundation.