Tanner J Huffman

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We have investigated the charge dynamics and the nature of many-body interactions in Laand Prdoped CaFe2As2. From the infrared part of the optical conductivity, we discover that the scattering rate of mobile carriers above 200 K exhibits saturation at the Mott-Ioffe-Regel limit of metallic transport. However, the dc resistivity continues to increase with(More)
We investigate the temperature dependence of infrared properties at nanometer length scales in La0.67Sr0.33MnO3 (LSMO) thin film with a thickness of 47 unit cells grown on SrTiO3 substrate. The infrared nano-imaging experiments were performed using a near-field optical microscope in conjunction with a variable temperature heating stage. The near-field(More)
Scattering-type scanning near-field optical microscopy (S-SNOM) has enormous potential as a spectroscopy tool in the infrared spectral range where it can probe phonon resonances and carrier dynamics at the nanometer lengths scales. However, its applicability is limited by the lack of practical and affordable table-top light sources emitting intense(More)
Huffman, Tanner J. Ph.D., Purdue University, May 2015. The Effects of a Modeleliciting Activity on High School Student Design Performance. Professor: Dr. Nathan J. Mentzer. Modeling allows students to become more effective designers. High school technology and engineering students engage in engineering design challenges as part of traditional instructional(More)
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