Jiandi Zhang , Ph.D.

Jiandi Zhang, PhD
Professor of physics

Ph.D., 1994 - Syracuse University

Louisiana State University
Department of Physics & Astronomy
229-A Nicholson Hall, Tower Dr.
Baton Rouge, LA 70803-4001
(225) 578-4103-Office

Personal Home Page

Research Interests

Experimental Condensed Matter and Materials Physics

One grand challenge in condensed matter physics and materials science is to understand the remarkable properties emerging from complex correlations of atomic and electronic constituents, and to control these properties for technological applications. The complexity in many novel materials is directly responsible for their tenability and consequently their practical functionality. In many cases, Creating surfaces, interfaces, ultra-thin films, and artificial superstructures add the additional twist of “man-made” dimensions, approaching the quantum phenomena of correlated electrons with broken symmetry and reduced dimensionality.

My main research interest is in exploring novel properties of complex materials like transition-metal oxides by the effects of broken symmetry, reduced dimensionality and spatial confinement, and by controlling lattice strain and chemical composition. The research include growing artificially structured configurations of complex materials like transition-metal oxides with atomic scale precision and in-situ comprehensive characterization on lattice structure, chemical composition, electronic and magnetic properties.

Current and Selected Publications

• R.-W. Li, H. Wang, X. Wang, X.Z. Yu, Y. Matsui, Z.-H Cheng, B.-G. Shen, E.W. Plummer, and Jiandi Zhang, "Anomalously Large Anisotropic Magnetoresistance in a Perovskite Manganite", PNAS, 106, 14224 (2009).

• V. B. Nascimento, A. Li, D. R. Jayasundara, Y. Xuan, J. O'Neal, S. Pan, T. Y. Chien, B. Hu, X. B. He, G. Li, A. S. Sefat, M. A. McGuire, B. C. Sales, D. Mandrus, M. H. Pan, Jiandi Zhang, R. Jin, and E. W. Plummer, "Surface Geometric and Electronic Structures of BaFe2As2(001)," Phys. Rev. Lett. 103, 076104 (2009).

• R. Moore, V. B. Nascimento, Jiandi Zhang, J. Rundgren, R. Jin, D. Mandrus, and E. W. Plummer, "Manifestations of Broken Symmetry: The Surface Phases of Ca_2-xSr_xRuO_4" (with ), Phys. Rev. Lett. 100, 066102 (2008).

• R. Moore, Jiandi Zhang, V. B. Nascimento, R. Jin, Jiandong Guo, G.T. Wang, Z. Fang, D. Mandrus, and E.W. Plummer, "A Surface-Tailored, Purely Electronic, Mott Metal-to-Insulator Transition," Science 318, 615 (2007).

• Jiandi Zhang, Ismail, R. G. Moore, S.-C. Wang, H. Ding, R. Jin, D. Mandrus, and E.W. Plummer, "Dopant-Induced Nanoscale Electronic Inhomogeneities in Ca_2-xSr_xRuO₄ ," Phys. Rev. Lett. 96 066401 (2006).

• F. Ye, P. Dai, J.A. Fernandez-Baca, J.W. Lynn, H. Kawano-Furukawa, Y. Tomioka, Y. Tokura and Jiandi Zhang, "Evolution of Spin-Wave Excitations in Ferromagnetic Metallic Manganites ," Phys. Rev. Lett. 96, 047204 (2006).

• S.-C. Wang, H. –B. Yang, A. Sekharan, H. Ding, C.X. Lu, Jiandi Zhang, Rongying Jin, D.G. Mandrus, and E.W. Plummer, "ARPES study of the Electronic Structure Evolution in Ca_2-xSr_xRuO₄," Phys. Rev. Lett. 93, 177007 (2004).

• Hongwei Qu, W. Yao, T. Garcia, Jiandi Zhang, S. Ducharme, P. A. Dowben, A. V. Sorokin, and V. M. Fridkin, "Nanoscale Polarization Manipulation and Conductance Switching in Ultra Thin Films of a Ferroelectric Copolymer,"   Appl. Phys. Lett. 82, 4322 (2003).

• Jiandi Zhang, P. Dai, J.A. Fernadez-Baca, E.W. Plummer, Y. Tomioka, and Y. Tokura, "Jahn-Teller Phonon Anomaly and Dynamic Phase Fluctuations in La_0.7Ca_0.3MnO₃," Phy. Rev. Lett. 86, 3823 (2001).

• R. Matzdorf, Z. Fang, Ismail, Jiandi Zhang, T. Kimura, Y. Tokura, K. Terakura, and E.W. Plummer, "Ferromagnetism Stabilizedby Lattice Distortion at the Surface of the p-wave Superconductor:Sr₂RuO₄," Science 289,746 (2000).

• H. H. Weitering, J. M. Carpinelli, A. V. Melechko, Jiandi Zhang, M. Bartkowiak, and E. W. Plummer, "How Defects Rule the Condensation of a Charge Density Wave: An atomic View," Science 285, 2107 (1999).