Dr. Dr. Peter Dowben Book Listings Dr. Dowben's Web Page email: Dr. Dowben Dr. Dowben's Web Page NCMN Homepage

Dr. Peter Dowben,
Charles Bessey Professor of Physics
Physics & Astronomy

University of Nebraska - Lincoln
310L T. Jorgensen Hall
Lincoln, Nebraska 68588-0299
office: (402) 472-9838
fax: (402) 472-6148
email: pdowben1@unl.edu
Dowben's webpage

Current Research

Peter Dowben’s research program concentrates on electronic band structure and the influence of electronics structure on various phase transitions. A large effort is directed toward the study of the electronic (bandstructure) mediated transitions in thin films and overlayers and relating these phase transitions to changes in metallicity and the electronic band structure. In particular, Peter Dowben's group is interested in the nature of the transition - the details of what drives the transition from the clearly nonmetallic to the clearly metallic phase in reduced dimensionality. There is a transition region or a "gray region" between what is clearly nonmetallic and what is metallic. This transition region is a poorly understood aspect of the nonmetal to metal transition.

Strong emphasis is placed on understanding surface and interface electronic structure and related magnetic and ferroelectric properties. The experimental emphasis is on electron spectroscopies including angle-resolved photoemission, angle-resolved inverse photoemission, spin polarized inverse photoemission and spin polarized electron energy loss spectroscopy. Other techniques include low energy electron diffraction, angle-resolved thermal desorption, angle-resolved X-ray photoemission, and light polarization dependent photo-assisted thermal desorption.

Both organic (molecular) and inorganic systems are under investigation, including a variety of ferromagnets and dielectric barrier layer materials.

The research program is funded by the NSF, ONR, and DTRA.

Selected RECENT PUBLICATIONS:

H. Lu,  T. A. George,  Y. Wang,  I. Ketsman,  J. D. Burton,  C.-W. Bark,  S. Ryu,D. J. Kim,  J. Wang,  C. Binek,  P. A. Dowben,  A. Sokolov,  C.-B. Eom,  E. Y. Tsymbal, and A. Gruverman, “Electric modulation of magnetization at the BaTiO3/La0.67Sr0.33MnO3 interfaces”, Applied Physics Letters 100 (2012) 232904

Lucie Routaboul, Pierre Braunstein, Jie Xiao, Zhengzheng Zhang, Peter A. Dowben, Guillaume Dalmas, Victor DaCosta, Olivier Félix, Gero Decher, Luis G. Rosa, and Bernard Doudin, “Altering the Static Dipole on Surfaces Through Chemistry: Molecular Films of Zwitterionic Quinonoids”, J. Am. Chem. Soc. 134 (2012) 8494?8506

Zhengzheng Zhang, Jose Alvira, Xenia Barbosa, Luis G. Rosa, Lucie Routaboul, Pierre Braunstein, Bernard Doudin, and Peter A. Dowben, “Lock and Key Adsorption Chemistry: Preferential Absorption of an Isomer of Di-iodobenzene on Molecular Films of Quinonoid Zwitterions”, J. Physical Chemistry C 115 (2011) 2812–2818; dx.doi.org/10.1021/jp110611u

Ning Wu, Xi He, Aleksander Wysocki, Uday Lanke, Takashi Komesu, Kirill D. Belashchenko, Christian Binek and Peter A. Dowben, “Imaging and control of surface magnetization domains in a magnetoelectric antiferromagnet”, Physical Review Letters 106 (2011) 087202

N.Wu, P. A. Dowben, "Magnetic Surface States in High Polarization Materials", Spintronics IV, edited by H. Drouhin, J. Wegrowe, M. Razeghi, Proc. of SPIE Vol. 8100 (2011) 81000T.

Z. Zhang, J. Alvira, X. Barbosa, L. B. Rosa, L. Routaboul, P. Braunstein, B. Doudin, P. A. Dowben, "Lock and Key Absorption Chemistry: Preferential Abstorption of an Isomer of Di-Iodobenzene on Molecular Films of Quinonoid Zitterions", J. Physical Chemistry C 115 (2011) 2812-2818.

Z. Zhang, R. Gonzalez, G. Diaz, L. G. Rosa, I. Ketsman, X. Zhang, P. Sharma, A. Gruverman, P. A. Dowben, "Polarization Mediated Chemistry on Polymer Ferroelectric Surfaces", J. Phys. Chem. C 115 (2011) 13041-13046.

L. Kong, F. Chesneau, Z. Zhang, F. Staier, A. Terfort, P. A. Dowben and M. Zharnikov, "The Electronic Structure of Aromatic Monomolecular Films - The Effect of Molecular Spacers and Interfacial Dipoles", J. Phys Chemistry C 115 (2011) 22422-22428.

Zhengzheng Zhang, Rosette González, Gerson Díaz, Luis G. Rosa, Ihor Ketsman, Xin Zhang, Pankaj Sharma, Alexei Gruverman, and Peter A. Dowben, “Polarization mediated chemistry on polymer ferroelectric surfaces”, J. Phys. Chem. C 115 (2011) 13041-13046

 V.T. Adamiv, Ya.V. Burak, D. Wooten, J. McClory, J. Petrosky, I. Ketsman, Jie Xiao, Ya.B. Losovyj, and P.A. Dowben, “The Electronic Structure and Secondary Pyroelectric Properties of Lithium Tetraborate”, Materials 3 (2010) 4550-4579; doi: 10.3390/ ma3094550  Lingmei Kong, Cameron Bjelkevig, Sneha Gaddam, Mi Zhou, Young Hee Lee, Gang Hee Han, Hae Kyung Jeong, Ning Wu, Zhengzheng Zhang, Jie Xiao, P. A. Dowben, and Jeffry A. Kelber, “Graphene/substrate charge transfer characterized by inverse photoelectron spectroscopy”, J. Physical Chemistry 114 (2010) 21618-21624

Xi He, Yi Wang, N. Wu, Siqi Shi, A. Caruso, E. Vescovo, K. D. Belashchenko, P.A. Dowben, Ch. Binek, “Robust isothermal electric control of exchange bias at room temperature”, Nature Materials 9 (2010) 579-585

I. Ketsman, D. Wooten, Jie Xiao, Ya.B. Losovyj, Ya.V. Burak, V.T. Adamiv, A. Sokolov, J. Petrosky, J. McClory, and P.A. Dowben, “The off-axis pyroelectric effect observed for lithium tetraborate”, Phys. Lett. A 374 (2010) 891-895

Celebrating 20 years of Journal of Physics: Condensed Matter—in  honour of Richard Palmer, edited by David Ferry, Peter Dowben, and  John Ingelsfield, J. Phys. Cond. Matter 21 (2009)

J. A. Colón Santana, R. Skomski, V. Singh, V. Palshin, A. Petukhov, Ya. B. Losovyj, A. Sokolov, P.A. Dowben, and I. Ketsman, “Magnetism of Cr-Doped Diamond”, J. Applied Physics 105 (2009) 07A930, republished in the March 23, 2009 issue of Virtual Journal of Nanoscale Science & Technology

Wisbey, DS (Wisbey, David S.); Wu, N (Wu, Ning); Feng, D (Feng, Danqin); Caruso, A (Caruso, An); Belot, J (Belot, J.); Losovyj, YB (Losovyj, Ya. B.); Vescovoe, E (Vescovoe, E.); Dowben, PA (Dowben, P. A.), "Induced spin polarization of copper spin 1/2 molecular layers", Physics Letters A, 373 (4): 484-488 Jan 19 2009.

Xiao, J (Xiao, Jie); Dowben, PA (Dowben, Peter A.), "Changes in the adsorbate dipole layer with changing d-filling of the metal (II) (Co, Ni, Cu) phthalocyanines on Au(111)", Journal of Physics-Condensed Matter, 21 (5): Art. No. 052001 Feb 4 2009.

Jie Xiao and Peter A. Dowben, "The role of the interface on the electronic structure of adsorbed metal (II) (Co, Ni, Cu) phthalocyanines", J. Materials Chem. 19 (2009) 2172-2178.

Velev, JP (Velev, J. P.); Dowben, PA (Dowben, P. A.); Tsymbal, EY (Tsymbal, E. Y.); Jenkins, SJ (Jenkins, S. J.); Caruso, AN (Caruso, A. N.), "Interface effects in spin-polarized metal/insulator layered structures", Surface Science Reports, 63 (9): 400-425 Sept 15 2008.

Wisbey, D (Wisbey, David); Wu, N (Wu, Ning); Feng, DQ (Feng, Danqin); Caruso, AN (Caruso, A. N.); Belot, J (Belot, John); Losovyj, Y (Losovyj, Yaroslav); Vescovo, E (Vescovo, Elio); Dowben, PA (Dowben, Peter A.)," Interface-induced spin and dipole ordering of the copper spin 1/2 molecule: Bis(4-cyano-2,2,6,6-tetramethyl-3,5-heptanedionato)copper(II)", Journal of Physical Chemistry C, 112 (35): 13656-13662 Sept 4 2008.

Losovyj, YB (Losovyj, Ya. B.); Klinke, M (Klinke, Melanie); Cai, E (Cai, En); Rodriguez, I (Rodriguez, Idaykis); Zhang, JD (Zhang, Jiandi); Makinistian, L (Makinistian, L.); Petukhov, AG (Petukhov, A. G.); Albanesi, EA (Albanesi, E. A.); Galiy, P (Galiy, P.); Fiyala, Y (Fiyala, Ya.); Liu, J (Liu, Jing); Dowben, PA (Dowben, P. A.), "The electronic structure of surface chains in the layered semiconductor In4Se3(100)", Applied Physics Letters, 92 (12): Art. No. 122107 Mar 24 2008.

Latest Patent (one of 14)

Anthony N. Caruso, Jennifer I. Brand, Peter A. Dowben, "Boron carbide particle detectors", United States Patent 7,368,794, issued May 6, 2008

Recent doctoral students graduate (from 33 total):

ZhengZheng Zhang, Ph.D.
Department of Physics and Astronomy, University of Nebraska, 2011
Thesis: “The interplay between symmetry and static dipoles with adsorption on molecular substrates”
Now: journalism student at the U. of Missouri - Columbia
Student prizes: University of Nebraska Outstanding Graduate Student award, honorable mention (2011)

Jing Liu, Ph.D.
Department of Physics and Astronomy, University of Nebraska, 2011
Thesis: “Photofragmentation Processes of the closo-Carboranes and the Local Structure of TransitionMetal Doped Semiconducting Boron Carbide Thin Films”
Now: staff, Center for Advanced Materials and Devices, Louisiana State University
Student prizes: Chinese National Award for Outstanding Students Studying Abroad (2011)

Ning Wu, Ph.D.
Ph.D., Department of Physics and Astronomy, University of Nebraska, 2009
Now: post-doctoral associate with the University of Nebraska

Jie Xiao, Ph.D.
Department of Physics and Astronomy, University of Nebraska, 2009
Now: post-doctoral associate with the University of Erlangen with Hans-Peter Steinrück

David Wisbey,Ph.D.
Department of Physics and Astronomy, University of Nebraska, 2008
Now: assist. Professor, St. Louis University

Carolina Ilie, Ph.D.
Department of Physics and Astronomy, University of Nebraska, 2008
Now: assistant Professor of Physics, State University of New York at Oswego

Danqin Feng, Ph.D.
Department of Physics and Astronomy, University of Nebraska, 2007
Now: post-doctoral associate, Department of Physics, University of California at Santa Barbara, with Alan Heeger

Snjezana (Snow) Balaz, Ph.D.
College of Engineering, University of Nebraska, 2007 (with Prof. Jennifer Brand); M. Sc. Department of Physics and Astronomy, University of Nebraska
Now post-doctoral associate, Department of Electrical Engineering, Ohio State University

Luis Rosa, Ph.D.
Department of Physics and Astronomy, University of Nebraska, 2005
Now: assistant Professor of Physics, University of Puerto Rico-Humacao

Anthony Caruso, Ph.D., Department of Physics and Astronomy, University of Nebraska, 2004
Now: associate Professor of Physics, University of Missouri - Kansas City, and visiting scientific staff at North Dakota State             University Center for Nanoscale Science and Engineering

· Hae-Kyung Jeong, Ph.D. 2003, Now Research Assistant Professor, Sung Kyung Kwan University.
· Rui-Hua Cheng, Ph.D. 2002, Now Assistant Professor of Physics at Purdue University - Indianapolis.
· Takashi Komesu, Ph.D. 2002, Now staff at Spring–8.
· Bo Xu, Ph.D. 2002, Now Assistant Professor at the Department of Physics, Yanjing University.
· Camelia Borca, Ph.D. 2001, Now a staff member at the Paul Scherrer Institute, Switzerland.

Dr. Dowben's Research