Events

BaCuSF is a p-type transparent conductor. This thesis project investigated whether Cu vacancies were responsible for the conductivity of the undoped material. BaCuSF thin films were grown by pulsed laser deposition and characterized by several different techniques. Films deposited with a small amount of excess Cu were more resistive, which supports the hypothesis.

We present a technique capable of producing subwavelength focal spots in planar nonresonant structures not limited to the near-field of the source. The approach combines the diffraction gratings that generate the high-wave-vector-number modes and planar slabs of homogeneous anisotropic metamaterials that propagate these waves and combine them at the subwavelength focal spots.

Density functional calculations have been performed to
elucidate the source of unintentional p-type conductivity in nominally
stoichiometric BaCuChF (Ch = S, Se, Te) wide bandgap semiconductors. Formation
enthalpies and transition levels (activation energies) were found for all
vacancies and antisites, and for some interstitials. Results of this initial
study suggest that of all hole-producing point defects, copper vacancies are
the easiest to form. The formation energy of copper vacancies decreases with increasing

Pizza will be served at 11.30am. Sign up in the Physics Main Office. Ask a world expert (and exceptional teacher) about nanophysics and learn about opportunities in research and industry related to nanophysics.

The electronic properties of carbon nanotubes exhibit fascinating parallels to phenomena normally encountered in elementary particle physics. The quantization of the electron motion around the circumference of the tube gives rise to electron-hole symmetric subbands. Each subband is analogous to a different elementary particle/antiparticle, and the mathematics describing this is analogous to early versions of string theory. Furthermore, the subbands have a relativistic dispersion relation, with the speed of light replaced by the Fermi velocity.

Ask a world expert (and exceptional teacher) about nanophysics and learn about opportunities in research and industry related to nanophysics.

Refreshments will be provided

Hello all! Please come help us celebrate 100 years of physics at Oregon
State University with a special spring picnic birthday-bash on June 6th from
1-5 pm at the Maple Grover Shelter in Avery Park, Corvallis.

We have created an RSVP webpage - please take a moment to rsvp at:

http://www.physics.oregonstate.edu/picnicRSVP

Special picnic events include:

* A Salmon bake, along with hamburgers, vegiburgers, and hot dogs
* A juggling show by the OSU juggling club, along with informal juggling lessons and a discussion of the physics/math behind juggling

The PH575 students will present posters on the band structure calculations they have done this term. The students have chosen materials of scientific and technological interest and have calculated the electronic structure from first principles using Wien 2k. Faculty and students from any department with an interest in solid state physics are cordially invited to attend. This is a mock-conference format, which also means that coffee & tea will be served.

Dinner for graduating seniors, by invitation.