Department of Physics & Astronomy




			Dr. Norman Mannella, Assistant Professor Condensed Matter Physics Office: 407-B Nielsen Physics Building Phone: 974-6123 e-mail: nmannell@utk.edu		[research interests] [brief vita] [for prospective students] [selected publications] [highlights in the press] [open positions]



	Research Interests Physics of novel materials and complex electron systems. Strongly correlated transition metal oxides (colossal magnetoresitive manganites, high temperature superconductors, cobalt oxides). Physics of magnetic, ferroelectric and dielectric materials suitable for technological applications. Novel materials characterization methodology. Atomic, electronic, magnetic and orbital dynamics in complex electron systems. Sub-picoseconds temporal dynamics of different degrees of freedom in complex electron systems. Phase transitions. Properties, growth and characterization of low dimensional materials, nanostructures, surfaces and interfaces in materials of technological relevance. Light - matter interaction and physics of the fundamental processes concerning the use and development of soft-x-ray spectroscopies techniques. High-resolution angle-resolved photoemission spectroscopy (ARPES), core level photoemission spectroscopy, x-ray absorption spectroscopy (XAS), soft x-ray emission spectroscopy (XES) and inelastic x-ray scattering (RIXS). Development of advanced scientific instrumentation for x-ray spectroscopies. Brief Vita I obtained my Ph.D. in Physics in September 2003 from UC Davis (CA) with Prof. C. S. Fadley. Immediately after, I became a Postdoctoral Fellow at Stanford University (CA) with Prof. Z. X. Shen, with a joint appointment as a Visiting Scientist at the Advance Light Source (ALS) in Berkeley (CA) in the User Support System Group of Dr. Z. Hussain. In October 2006, I obtained a joint position as Research Associate at Stanford University in Prof. Z. X. Shen’s group and Beamline Scientist at the ALS in the User Support System Group of Dr. Z. Hussain. I became an Assistant Professor in the Physics Department at UTK in August 2007. For a full CV, including full publications record, go here. For Prospective Students I am currently starting up a group for the study of complex electron systems. I am looking to hire a couple of highly motivated graduate students who are interested in the study of novel materials and complex electron systems with soft x-ray spectroscopies. If interested, please e-mail (nmannell@utk.edu) or call me in the office (4-6123). A brief description of my research interests may be found here. Selected Publications N. Mannella, W. Yang, K. Tanaka, X. J. Zhou, H. Zheng, J. F. Mitchell, J. Zaanen, T. P. Devereaux, N. Nagaosa, Z. Hussain and Z.-X. Shen Polaron coherence condensation as the mechanism for colossal magnetoresistance in layered manganites Physical Review Letters, Submitted W.L. Yang, J.D. Fabbri, T.M Willey, J.R.I. Lee, J.E. Dahl, R.M.K. Carlson, P. R. Schreiner, A. A. Fokin, B.A. Tkachenko, N.A. Fokina, W. Meevasana, N. Mannella, K. Tanaka, X.J. Zhou, T. van Buuren, M.A. Kelly, Z. Hussain, N.A. Melosh and Z.X. Shen Monochromatic electron photoemission from diamondoid monolayers Science 316, 1460 (2007) S. Danzenbächer, Yu. Kucherenko, C. Laubschat, D. V. Vyalikh, Z. Hossain, C. Geibel, X. J. Zhou, W. L. Yang, N. Mannella, Z. Hussain, Z.-X. Shen and S. L. Molodtsov Energy dispersion of 4f-derived emissions in photoelectron spectra of the heavy-fermion compound YbIr₂Si₂ Physical Review Letters 96, 106402 (2006) N. Mannella, W. Yang, X. J. Zhou, H. Zheng, J. F. Mitchell, J. Zaanen, T. P. Devereaux, N. Nagaosa, Z. Hussain and Z.-X. Shen Nodal Quasiparticle in Pseudogapped Colossal Magnetoresistive Manganites Nature 438, 474 (2005) N. Mannella, A. Rosenhahn, M. Watanabe, B. Sell, A. Nambu, S. Ritchey, E. Arenholz, A. Young, Y. Tomioka and C.S. Fadley Temperature-Dependent X-Ray Absorption Spectroscopy of Colossal Magnetoresistive Perovskites Physical Review B 71, 125117 (2005) N. Mannella, A. Rosenhahn, C. H. Booth, S. Marchesini, B.S. Mun, S.-H. Yang, K. Ibrahim, Y. Tomioka and C.S. Fadley Direct Observation of High-Temperature Polaronic Behavior in Colossal Magnetoresistive Manganites Physical Review Letters 92, 166401 (2004) N. Mannella, G. Gabetta, F. Parmigiani Plasmon Energy Shift in Porous Silicon measured by X-Ray Photoemission Spectroscopy Applied Physics Letters 79, 4432 (2001) Highlights in the Press Polaron Behavior in CMR Manganites Highlighted in ALSNews, vol. 249 (2005) A Different Spin on Future Data Storage Highlighted in Science @ Berkeley Lab., March 03 (2005) Condensed-matter physics: Focus on the Fermi surface Highlighted in Nature 438, 435 (2005) Pseudogaps, polarons, and the mystery of high-T_c superconductivity Highlighted in ALSNews, vol. 264 (2006) Pseudogaps Are Not The Answer Highlighted in Science @ Berkeley Lab., Jan 30 (2006) Experiments debunk 'pseudogap' role in superconductivity Highlighted in Stanford Report Feb. 1 (2006) Experiments debunk 'pseudogap' role in superconductivity, pave way to practical superconductors Highlighted in Physorg.com/news10505, Feb. 2 (2006)