Selected Honors and Awards:
2009 Undergraduate Lecturing Instructor Award, from the Society of Physics Students at MSU. 2002 Florida Atlantic University Distinguished Teacher of the Year Award. 2001 Teacher Incentive Program Award, for excellence in teaching at Florida Atlantic University. 1999 National Science Foundation CAREER Award.
Biographical Sketch:
2007-present Professor at Montana State University.
2002-2007 Associate Professor at Montana State University. 1996-2002 Assistant Professor at Florida Atlantic University. 1993-1996 Postdoctoral Fellow at Los Alamos National Laboratory. 1990-1993 Postdoctoral Research at the University of Munich, Germany. 1990 Ph.D. in Physics, University of California, San Diego. 1986 M.S. in Physics, University of California, San Diego. 1984 B.S. in Physics, Stockton State College, New Jersey.
Interests:
Our research involves studying the physical properties of novel condensed matter materials. Example materials include high temperature superconductors, low-dimensional materials, and manganese oxides which exhibit colossal magnetoresistance. Many of our experiments focus on the study of phase transitions and the connection between structure and physical properties. We also measure magnetic properties and other thermodynamic properties, such as heat capacity. This research program is focused on fundamental, rather than applied physics. Much of our work involves the growth and characterization of bulk materials in polycrystalline and single-crystal form, which allows control of the samples used in our experiments and the ultimate in flexibility. We have a NEC optical image furnace for growing very large single crystals and a number of conventional furnaces. Over the last 7 years we have been developing new techniques for measuring the thermal expansion of solids using capacitive dilatometry (see Rev. Sci. Instrum. 79 (2008) 33903 Click for pdf). This project utilizes a novel thermal expansion cell constructed of fused silica (quartz). In addition, we are currently developing a cell made of single-crystal sapphire, to take advantage of its superior thermal conductivity. We are the world experts in these type of thermal expansion cells, which are fabricated by us in our machine shop. Our experiments are conducted in the temperature range from 0.3 K to 1000 K. Some of our projects involve the development of new cryogenic devices. Director of the Condensed Matter and LASER Physics REU Program. This program provides summer research opportunities to undergraduates.
Selected Publications:
(Over 90 publications in peer-reviewed journals.) Electrical transport in single-crystalline Li0.9Mo6O17: A two-band Luttinger liquid exhibiting Bose metal behavior, C. A. M. dos Santos, M. S. da Luz, Yi-Kuo Yu, J. J. Neumeier, J. Moreno, and B. D. White, Phys. Rev. B 77 (2008) 193106. Click for pdf Capacitive-Based Dilatometer Cell Constructed of Fused Quartz for Measuring the Thermal Expansion of Solids, J. J. Neumeier, R. K. Bollinger, G. E. Timmins, C. R. Lane, R. D. Krogstad, and J. Macaluso, Rev. Sci. Instrum. 79 (2008) 33903. Click for pdf Dimensional crossover in the purple bronze Li0.9Mo6O17, C. A. M. dos Santos, B. D. White, Yi-Kuo Yu, J. J. Neumeier, and J. A. Souza, Phys. Rev. Lett. 98 (2007) 266405. Click for pdf Impurity conduction and magnetic polarons in antiferromagnetic oxides, C. Chiorescu, J. L. Cohn, and J. J. Neumeier, Phys. Rev. B. Rapid Communications 76 (2007) 20404. Anisotropic electrical resistivity of the quasi 1-D Li0.9Mo6O17 determined by the Montgomery method, M. S. da Luz, C. A. M. dos Santos, J. Moreno, B. D. White, and J. J. Neumeier, Phys. Rev. B. 76 (2007) 233105. Magnetic susceptibility and electrical resistivity of LaMnO3, CaMnO3, and La1-xSrxMnO3 (0.13 <= x <= 0.45) in the temperature range 300 K < T < 900 K, J. A. Souza, J. J. Neumeier, R. K. Bollinger, B. McGuire, C. A. M. dos Santos, and H. Terashita, Phys. Rev. B 76 (2007) 24407. Click for pdf Effect of disorder on the thermodynamic phase transition in La0.7Ca0.3MnO3, J. A. Souza, J. J. Neumeier, and R. F. Jardim, Phys. Rev. B 75 (2007) 12412. Click for pdf Thermodynamic nature of the antiferromagnetic transition in NaxCoO2, C.A.M. dos Santos, J. J. Neumeier, Y.-K. Yu, R. K. Bollinger, R. Jin, D. Mandrus, and B. C. Sales, Phys. Rev. B 74 (2006) 132402. Click for pdf Method for analyzing second-order phase transitions: Application to the ferromagnetic transition of a polaronic system, J. A. Souza, Y-K. Yu, J. J. Neumeier, H. Terashita, and R. F. Jardim, Phys. Rev. Lett., 94 (2005) 207209 (4 pages). Click for pdf Negative thermal expansion of MgB2 in the superconducting state and anomalous behavior of the bulk Grüneisen parameter, J. J. Neumeier, T. Tomita, M. Debassai, J. S. Schilling, P. W. Barnes, D. G. Hinks, and J. D. Jorgensen, Phys. Rev. B Rapid Commun. 72 (2005) 220505(R). Click for pdf
Grants:
Our research is funded by the National Science Foundation and the Department of Energy.
Selected Talks:
(Some recent presentations by postdocs and students.) Electrical transport and thermodynamic properties of Mo4O11, Ariana de Campos, M.S. da Luz, B.D. White, and J.J. Neumeier, Amer. Phys. Soc. March Meeting Program, K1.00049 (poster session) (2009). Anomalies in the bulk properties of single crystalline Niobium, Richard K. Bollinger, J. J. Neumeier, B. D. White, Yoko Suzuki, A. Migliori, Jon Betts, H. R. Z. Sandim, C. A. M. dos Santos, Amer. Phys. Soc. March Meeting Program, B23.00005 (oral session) (2009). High-Resolution Thermal Expansion Measurements of CaFe2As2, Ariana de Campos, M. S. da Luz, J. J. Neumeier, E. D. Bauer, F. Ronning, J. D. Thompson, Hanoh Lee, Tuson Park, Eunsung Park, Amer. Phys. Soc. March Meeting Program, J34.00010 (oral session) (2009). Critical behavior study of antiferromagnetism in isostructural La2CuO4+d and La2NiO4+d, Benjamin White
, John Neumeier, and A. Erb, Amer. Phys. Soc. March Meeting Program, D31.00006 (oral session) (2009).
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