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Using models that represent the structure of materials such as graphene, perovskites, and gallium arsenide, Garlow and Zhu are searching for applications that will create faster and more efficient computers and new electronic and energy technologies.
I hand-wound this solenoid. It was very frustrating. Man years later, Hanhee tells me that she winds solenoids using a drill... @#$!
Project description:
Thermometers for Studies at the Tricritical Point in Liquid Helium Mixtures
The EXACT flight definition experiment requires a high resolution thermometer (HRT) to study liquid helium mixtures at the tricritical point. The HRT must have a resolution less than or equal to 8 nK in the temperature range of 0.7-1.0 K. In this work, the sensitivity of an HRT was measured to determine its resolution. The thermometer uses a DC SQUID (Superconducting Quantum Interference Device) magnetometer to detect changes in the magnetic susceptibility of a paramagnetic material as a function of temperature. A magnetic field applied by a solenoid amplifies the magnetization of the material to yield a higher sensitivity, and a computer data acquisition program records the SQUID signal at equally spaced temperatures between 0.7 and 1.0 K. Preliminary measurements show that an HRT using gadolinium gallium garnet (GGG) in an applied magnetic field of 3-4 G can achieve a sensitivity an order of magnitude better than EXACT’s requirements.
Jet Propulsion Lab, Pasadena, CA 1999
Project description
Electron Spin Resonance Scanning Tunneling Microscopy
Electron spin resonance based scanning tunneling microscopy (ESR-STM) has been proposed as a method to detect spins of single molecules. The ability to measure single spins would open up new possibilities in analytical chemistry and quantum computing. Here, I report on my effort to repeat the ESR-STM experiments of Durkan and Welland. In particular, I took STM images, characterized drift, and built a vibration isolation system.
MIT Quanta Lab, Cambridge, MA 2002
In this illustration, an infrared laser beam (orange) triggers atomic vibrations in a thin layer of iron selenide, which are then recorded by ultrafast X-ray laser pulses (white) to create an ultrafast movie. The motion of the selenium atoms (red) changes the energy of the electron orbitals of the iron atoms (blue), and the resulting electron vibrations are recorded separately with a technique called ARPES (not shown). The coupling of atomic positions and electronic energies is much stronger than previously thought and may significantly impact the materialís superconductivity. (Greg Stewart/SLAC National Accelerator Laboratory)
My friend the FFT. I think this is data from the vibration sensor.
MIT Quanta Lab, Cambridge, MA 2002
The frame is made of 80-20 and lined with foam. The bottom is a couple slabs of granite for weight.
I later abandoned this project and another professor inherited this box. Apparently, he though my box worked really well and would smile when he saw me in the hallway (despite the fact that it took me forever to build it).
MIT Quanta Lab, Cambridge, MA 2002
Project description
Search for the Kondo Lattice
Using the atom manipulation capabilities of the scanning tunneling microscope (STM), we investigate the interactions that result from a square lattice of Kondo impurities. Spectroscopy measurements agree qualitatively with single impurity scattering theory. The agreement suggests that the impurities in the lattice do not interact strongly with one another (as in a Kondo lattice).
IBM Almaden Research Lab, San Jose, CA 2001
You can see a square lattice with the center impurity missing. The "mountains" are due to what we call an STM head crash.
IBM Almaden Research Lab, San Jose, CA 2001
The postdoc took this photo and made me wear full safety equipment.
Jet Propulsion Lab, Pasadena, CA 1999
I was all ready to do my measurements on many different sized square lattices, and then my boss decided to show some visitors the STM room. Somehow the STM head crashed and destroyed a lot of my work.
IBM Almaden Research Lab, San Jose, CA 2001
Exploratory synthesis of new superconductors, materials that carry electrical current with no energy loss
Witness The World in Infrared
New research allows normal cameras to capture Infrared images revealing a beautiful new world that was hidden under normal light.
#condensedmatterphysics #DrAssafLevanon #DrMichaelMrejen #electromagneticradiation #HaimSuchowski #infrared #InfraredRadiation #invisiblelight #Science #technology #TelAvivUniversity #ThermalImaging #Thermography #VisibleLight #YoniErlich bit.ly/36NiR9V
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