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Walid Malaeb


Physics


w.malaeb@bau.edu.lb


07 985080 Ex: 3312


Debbieh


Walid Malaeb

Assistant Professor of Physics


Dr. Walid Malaeb obtained a Ph.D. in Physics from the Department of Complexity Science and Engineering at The University of Tokyo, Japan in September 2009. After that he spent around 6 years at The Institute for Solid State Physics (ISSP) at The University of Tokyo as a Project Research Scientist. Since Sept. 2015 he has been an Assistant Professor of Physics at the Faculty of Science, Beirut Arab University. His research interest has been mainly focused on investigating the electronic structure of novel high-temperature superconductors especially the iron-based compounds (discovered in Japan in 2008) using the Synchrotron Radiation facilities in Japan in addition to collaborative work in USA and Germany. Currently he is extending his research at Beirut Arab University to additionally include electrical, structural, mechanical, magnetic and thermal properties of novel high-temperature superconductors and nanomaterials. He is the author and co-author of more than 30 scientific papers published in refereed journals and has joined many international conferences worldwide and delivered many invited and contributed presentations in Japan, USA, Italy, France, China, Singapore, Turkey and Qatar. Dr. Malaeb has been a member of the Japan Physical Society (JPS).

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Teaching

Fall 2015/2016:

  • Introductory Physics II
  • Electronics
  • Radiation Science
  • Research Topic
  • Classical Mechanics and Waves
  • Selected Topics in Materials Science

Spring 2015/2016:

  • Biophysics
  • Resonance Spectroscopy
  • Physical Optics
  • Principle of Physics
  • Superconductivity&its Applications
  • Condensed Matter Physics

Fall 2016/2017:

  • Material Properties and heat
  • Solid State Physics 1
  • Accelerator & Accelerator
  • Selected topics in Materials

Spring 2016/2017:

  • Biophysics 
  • Material Properties and Heat
  • Solid State Physics II
  • Physical Optics
  • Condensed Matter Physics

Fall 2017/2018:

  • Material Properties and heat.
  • Classical Mechanics and Wave
  • Advanced Electrodynamics I
  • Physics for Life Sciences
  • Selected topics in Materials Science

Spring 2017/2018:

  • Biophysics
  • Material properties and heat
  • Circuit Analysis
  • Physical Optics
  • Advanced Statistical Physics
  • Condensed Matter Physics

Fall 2018/2019:

  • Material Properties and heat
  • Classical Mechanics and Wave
  • Physics for Life Sciences
  • Selected topics in Materials Science
  • Modern Physics

Research

Research Collaborations

  • The Institute for Solid State Physics (ISSP), the University of Tokyo, Japan.
  • Department of Applied Physics, Faculty of Science and Technology, Keio University, Japan.

Research Interests

  • Studying the electrical, structural, mechanical, magnetic and thermal properties of novel high-temperature superconductors and nanomaterials at Beirut Arab University.
  • Photoemission Spectroscopy studies using Synchrotron Radiation on novel high-temperature superconductors with special focus on the newly discovered iron-pnictides. These studies are done in collaboration with The University of Tokyo and Waseda University in Japan.

Recent Publications

  • W. Malaeb, H. Basma, R. Awad, T. Hibino, Y. Kamihara, “Improvement of the superconducting properties of GdBa2Cu3O7-δ with nano-sized ferrites addition”, submitted, June 2018.
  • W. Malaeb, R. Awad, T. Hibino, Y. Kamihara, T. Kondo, S. Shin, “Electronic structure of the iron-based superconductor (La,Eu)FeAsO1-xFx investigated by laser photoemission spectroscopy”, Physica B: Physics of Condensed Matter, 536, 781–784 (2018).
  • W. Malaeb, H. Basma, M. ME. Barakat, R. Awad, “Investigation of the mechanical properties of GdBa2Cu3O7-δ added with nano-sized ferrites ZnFe2O4 and CoFe2O4 using ultrasonic measurement”, Journal of Superconductivity and Novel Magnetism 30, 3595-3602 (2017).
  • A. Srour, W. Malaeb, M. Rekabi, and R. Awad, “Mechanical properties of the (BaSnO3)x/Cu0.5Tl0.5Ba2Ca2Cu3O10−δ superconductor phase”, Physica Scripta 92, (10), 104002 (2017).
  • T. Shimojima, W. Malaeb et al., “Antiferroic electronic structure in the nonmagnetic superconducting state of the iron-based superconductors", Science Advances 3: e1700466 (2017). 
  • W. Malaeb, I. Kazah, R. Awad and M. Fujioka, “Mechanical properties of the iron-based superconductor SmFeAsO1-xFx”, Journal of Physics: Conference Series 869, 012042 (2017).
  • A. Srour, W. Malaeb, S. Marhaba, and R. Awad, “Thermoelectric power of (Cu0.5Tl0.5)-1223 superconducting phase added with BaSnO3 nanoparticles”, Journal of Physics: Conference Series 869, 012017 (2017).
  • A. Nakamura, T. Shimojima, T. Sonobe, K. Ishizaka, W. Malaeb et al., “Multiple-pseudogap phases in hydrogen-doped LaFeAsO system”, Physical Review B 95, 064501 (2017).
  • B. Feng, Y.-H. Chan, Y. Feng, R.-Y. Liu, M.-Y. Chou, K. Kuroda, K. Yaji, A. Harasawa, P. Moras, A. Barinov, W. Malaeb et al., “Spin Texture in Type-II Weyl Semimetal WTe2”, Physical Review B 94, 195134 (2016).
  • W. Malaeb, H. Basma, M. ME. Barakat, R. Awad, “Investigation of the mechanical properties of GdBa2Cu3O7-δ added with nano-sized ferrites ZnFe2O4 and CoFe2O4 using ultrasonic measurement”, Journal of Superconductivity and Novel Magnetism, DOI 10.1007/s10948-016-3863-x (2016).
  • M. Nakayama, Takeshi Kondo, Z. Tian, J.J. Ishikawa, M. Halim, C. Bareille, W. Malaeb et al., “Slater to Mott crossover in the metal to insulator transition of Nd2Ir2O7”, Physical Review Letters 117, 056403 (2016).
  • T. Yoshida, W. Malaeb et al., “Coexistence of a pseudogap and a superconducting gap for the high−Tc superconductor La2−x Srx CuO4 studied by angle-resolved photoemission spectroscopy”, Physical Review B 93, 014513 (2016).
  •  T. Kondo, M. Nakayama, R. Chen, J.J. Ishikawa, E.-G. Moon, T. Yamamoto, Y. Ota, W. Malaeb et al., “Quadratic Fermi node in a 3D strongly correlated semimetal”, Nat. Commun. 6, 10042 (2015).
  • T. Kondo, W. Malaeb et al., “Point nodes persisting far beyond Tc in Bi2212”, Nat. Commun. 6, 7699 (2015).
  • T. Yoshida, S. Ideta, T. Shimojima, W. Malaeb et al., “Anisotropy of the superconducting gap in the iron-based superconductor BaFe2(As1-xPx)2”, Sci. Rep. 4, 7292 (2014).
  • W. Malaeb, T. Shimojima, Y. Ishida, T. Kondo et al., “Evidence of a universal relation between electron-mode coupling and Tc in Ba1-xKxFe2As2 superconductor from Laser ARPES”, Physical Review B 90, 195124 (2014).
  • S. Ideta, T. Yoshida, M. Nakajima, W. Malaeb et al., “Electronic structure of BaNi2P2 observed by ARPES”, Physical Review B 89, 195138 (2014).
  • Y. Ota, K. Okazaki , Y. Kotani, T. Shimojima, W. Malaeb et al., “Evidence for excluding the possibility of d-wave superconducting-gap symmetry in Ba-doped KFe2As2” Physical Review B 89, 081103R (2014).
  • T. Shimojima, T. Sonobe, W. Malaeb et al., “Pseudogap formation above the superconducting dome in iron pnictides” Physical Review B 89, 045101 (2014).
  • S. Ideta, T. Yoshida, M. Nakajima, W. Malaeb et al., “Effects of Zn substitution on the electronic structure of BaFe2As2 revealed by angle-resolved photoemission spectroscopy”, Physical Review B 87, 201110(R) (2013).
  • T. Kondo, Y. Nakashima, W. Malaeb et al., “Anomalous doping variation of the nodal low-energy feature of superconducting (Bi,Pb)2(Sr,La)2CuO6+crystals revealed by laser-based ARPES”, Physical Review Letters 110, 217006 (2013).
  • T. Kondo, Y. Nakashima, Y. Ota, Y. Ishida, W. Malaeb et al., “Anomalous dressing of Dirac fermions in the topological surface state of Bi2Se3, Bi2Te3, and Cu-doped Bi2Se3”, Physical Review Letters 110, 217601 (2013).
  • M. Sakano, M. S. Bahramy, A. Katayama, T. Shimojima, H. Murakawa, Y. Kaneko, W. Malaeb et al., “Strongly spin-orbit coupled two-dimensional electron gas emerging near the surface of polar semiconductors”, Physical Review Letters 110, 107204 (2013).
  •  W. Malaeb, T. Shimojima, Y. Ishida, K. Okazaki et al., “Abrupt change in the energy gap of superconducting Ba1-xKxFe2As2 single crystals with hole doping”, Physical Review B 86, 165117 (2012).
  • K. Okazaki, Y. Ota, Y. Kotani, W. Malaeb et al., “Octet-line node structure of superconducting order parameter in KFe2As2”, Science 337, 1314 (2012).
  • R. Yoshida, M. Fukui, Y. Haga, E. Yamamoto, Y. Onuki, M. Okawa, W. Malaeb et al., “Observation of two fine structures related to the hidden order in the spectral functions of URu2Si2”, Physical Review B 85, 241102(R) (2012).
  • T. Shimojima, F. Sakaguchi, K. Ishizaka, Y. Ishida, W. Malaeb et al., “Angle-resolved photoemission study on the superconducting iron-pnictides of BaFe2(As,P)2 with low energy photons”, Solid State Communications 152, 695 (2012).
  • Y. Ishida, H. Kanto, A. Kikkawa, Y. Taguchi, Y. Ito, Y. Ota, K. Okazaki, W. Malaeb et al., “Common origin of the circular-dichroism pattern in ARPES of SrTiO3 and CuxBi2Se3”, Physical Review Letters 107, 077601 (2011).
  •  I. Nishi, M. Ishikado, S. Ideta, W. Malaeb et al., “ARPES study of PrFeAsO0.7: Comparison with LaFePO”, Physical Review B 84, 014504 (2011).

Activities

- Active member of several committees at BAU.

Conferences and Workshops (selected ones):

Presenting at many international conferences and workshops including invited talks in Japan, USA, France, Italy, Czech Republic, China, Singapore, Qatar, Turkey and Lebanon in addition to the periodically held Japan Physical Society meetings. Few selected talks are listed below:

  • 1- 6th International conference on superconductivity and magnetism (ICSM2018), Antalya-Turkey, April 29th- May 4th/2018: https://supermag.com.tr/icsm/2018/
  • 2- International conference on Strongly Correlated Electron Systems (SCES17), Prague, Czech Republic, July 17th – 21st / 2017: https://sces2017.org/
  • 3- Frontiers in Theoretical and Applied Physics (FTAPS 2017), The American University of Sharjah, United Arab Emirates, February 21st – 25th/ 2017: https://www.aus.edu/ftaps2017
  • 4- 5th international conference on superconductivity and Magnetism (ICSM2016), Fethiye-Turkey, April 24th-30th/2016: http://icsm2016.org/
  • 5- International Conference on Strongly Correlated Electron Systems (SCES), Grenoble-France, July 6th-11th/2014: http://www.sces2014.org/
  • 6- Brookhaven National Lab seminar, Long Island-New York, Sept. 9th/2013 (invited): http://www.bnl.gov/ps/events/
  • 7- International workshop on Recent developments in Fe-based high-temperature superconductors, Riverhead New York, Sept. 3rd-6th/2013 (invited): http://www.bnl.gov/fhs2013/
  • 8- International Conference on Materials and Mechanisms of Superconductivity (M2S), Washington D.C., July 29th-Aug 3rd/2012: http://www.m2s-2012.org/washington-dc/
  • 9- Qatar Foundation special seminar, Doha-Qatar, Oct.11th/2011 (invited): http://www.qscience.com/doi/abs/10.5339/qfarf.2012.AESNP21
  • 10- 9th International Conference on Materials and Mechanisms of Superconductivity, Tokyo, Japan, Sept. 7th-12th/2009.
  • 11- Nanyang Technological University – University of Tokyo joint symposium, Singapore, Feb. 2009.
  • 12- A3 workshop, Joint Research on Novel Properties of Complex Oxides, Shanghai, China, Dec. 7th- 8th/2008: http://www.physics.fudan.edu.cn/tps/people/dlfeng/Eng/A3/A3program.html
  • 13- International Conference on FeAs High Tc Superconducting Multilayers and Related Phenomena, Roma-Italy, Dec. 9-13/2008 (invited): http://www.roma1.infn.it/stripes/Menu/006Conferences/SuperStripes08/SuperStr08home.html

Research Projects and Awards

- Japanese government full scholarship (Monbusho) for Ph.D. study between 2006 and 2009.

- BAU full scholarship for undergraduate study between 2000 and 2002.

- The Jamal Abdel Nasser Award for Scientific Distinction from BAU in 2002.