About

Walid Malaeb

Assistant Professor of Physics

Dr. Walid Malaeb joined LAU as a full-time assistant professor of physics in Fall 2022. He obtained a PhD in Physics from the Graduate School of Frontier Sciences at The University of Tokyo, Japan in September 2009 and stayed at the same university as a project researcher at the Institute for Solid State Physics (ISSP) until 2015.

Moving back to Lebanon, he became an associate professor of physics at the Beirut Arab University until August 2022. Dr. Malaeb was a member of the Physical Society of Japan (JPS) between 2006 and 2015 and, since 2016, has been a visiting assistant as well as associate professor at Keio University in Japan. He has also worked on collaborative research projects with the University of Tokyo.

Research Interests

Dr. Malaeb’s research interests focus on investigating the electronic structure of novel high-temperature superconductors, especially the iron-pnictides using synchrotron radiation and advanced lasers. He has also been investigating the structural, mechanical, electrical, magnetic and thermal properties of novel high-temperature superconductors and nanomaterials. 

He is the author and co-author of more than 40 scientific papers published in refereed scientific journals with more than 1,700 citations and an H-index of 18 on Google Scholar. Additionally, Dr. Malaeb has joined many international conferences and delivered talks in Japan, the US, Italy, France, the Czech Republic, China, Singapore, Turkey, Qatar and the United Arab Emirates, among others.

Selected Publications

  • Kamar, A. Srour, M. Roumié, W. Malaeb, R. Awad, A. Khalaf, “Comparative study of structural and superconducting properties of (Cu0.5Tl0.5)Ba2Ca2Cu3O10-δ phase substituted by copper fluoride and thallium fluoride,” Applied Physics A, 127 (8), 1-15 (2021).

  • Srour, H. Basma, S. Noureldeen, W. Malaeb, R. Awad, “ESR Investigations of (BaSnO3)x/(Cu, Tl) 1223 composite in the normal and superconducting state,” Phase Transitions, https://doi.org/10.1080/01411594.2021.1931205 (2021).

  • Assi, Z. Bitar, W. Malaeb, R. S. Hassan, N. Yaacoub, R. Awad, “Investigating the role of diamagnetic Cd2+ ions on the structural, optical, and magnetic properties of YIG,” Physica Scripta, https://doi.org/10.1088/1402-4896/abfde1 (2021).

  • Nasser, A. Srour, N. El Ghouch, W. Malaeb, R. Al-Oweini, R. Awad, “Investigation of the physical properties of (Cu0.5Tl0.5)Ba2Ca2Cu3O10-δ impregnated with mono cobalt(II)-substituted Undecatungstosilicate Nanoparticles,” Applied Physics A, 126, 951 (2020).

  • W. Labban, W. Malaeb, K. Habanjar, M.S. Hassan, R. Sakagami, Y. Kamihara, R. Awad, “Investigations of arsenic substitution on the physical, electrical and magnetic properties of Bi-2212 superconductors,” Phase Transitions, 93, 1055-1066 (2020). (In collaboration with Y. Kamihara, the discoverer of high-Tc superconductivity in iron-pnictides in 2008.)

  • R. Al Youssif, T. Sahab, G. Zissis, W. Malaeb, M. Hamady, “Calculation of Net Emission Coefficient for High Intensity Discharge Lamps,” Journal of Light and Engineering, 28, 80-86 (2020).

  • W. Malaeb, H. Basma, R. Awad, T. Hibino, Y. Kamihara, “Improvement of the Superconducting Properties of GdBa2Cu3O7-δ with Nano-Sized Ferrites Addition,” Journal of Superconductivity and Novel Magnetism, 32, 3065–3069 (2019). (In collaboration with Y. Kamihara, the discoverer of high-Tc superconductivity in iron-pnictides in 2008.)

  • 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). (In collaboration with Y. Kamihara, the discoverer of high-Tc superconductivity in iron-pnictides in 2008.)

  • 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).

  • 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).

  • 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).

  • 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).

  • Srour, R. Awad, W. Malaeb, M.M. Barakat, “Physical Properties of (BaSnO3)x/Cu0.5Tl0.5Ba2Ca2Cu3O10−δ Superconductor Composite,” J. Low. Temp. Phys. 189, 217–229 (2017).

  • 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).

  • 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-xKxFe2As2superconductor from laser angle-resolved photoemission spectroscopy,” Physical Review B 90, 195124 (2014).

  • S. Ideta, T. Yoshida, M. Nakajima, W. Malaeb, et al., “Electronic Structure of BaNi2P2 Observed by Angle-Resolved Photoemission Spectroscopy,” 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, 201110R (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 angle-resolved photoemission spectroscopy,” 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, 241102R (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).

  • Nishi, M. Ishikado, S. Ideta, W. Malaeb, et al., “Angle-resolved photoemission spectroscopy study of PrFeAsO0.7: Comparison with LaFePO,” Physical Review B 84, 014504 (2011).

  • W. Malaeb, T. Yoshida, A. Fujimori, et al., “Three-dimensional electronic structure of superconducting iron pnictides observed by angle-resolved photoemission spectroscopy,” Journal of the Physical Society of Japan 78, 123706 (2009). (Among JPSJ’s top 20 most downloaded articles in Dec. 2009).

  • W. Malaeb, T. Yoshida, T. Kataoka, et al., “Electronic Structure and Electron Correlation in LaFeAsO1-xFx and LaFePO1-xFx,” Journal of the Physical Society of Japan 77, 093714 (2008). (Among JPSJ’s top 20 most downloaded articles in Sept. 2008 in collaboration with Y. Kamihara and H. Hosono, the discoverers of high-Tc superconductivity in iron-pnictides in 2008).

  • W. Malaeb, T. Yoshida, T. Kataoka, et al., “Photoemission Study of the Electronic Structure of LaFeAsO1-xFx and LaFePO1-xFx,” Journal of the Physical Society of Japan 77 (2008): Proceedings of the Intl. Symposium on Fe-Pnictide Superconductors.

  • W. Malaeb, T. Yoshida, M. Hashimoto, et al., “Temperature dependence of the chemical potential in La2-xSrxCuO4,” Journal of Physics: Conference Series 108, 012018 (2008).

  • R. Awad, A.I. Abou-Aly, S. Isber, W. Malaeb, “Investigation of specific heat and thermopower properties of Tl-1223 substituted by sodium,” Solid State Communications 145, 201 (2008).

  • R. Awad, A.I. Abou-Aly, S. Isber, W. Malaeb, “Effect of the partial replacement of Ca by alkaline element Na on Tl-1223 superconductor,” Journal of Physics: Conference Series 43, 474 (2006).

Academic Degrees

  • PhD in Physics, The University of Tokyo, Japan (2009).
  • MS in Physics, Beirut Arab University, Lebanon (2005).
  • BS in Physics, Beirut Arab University, Lebanon (2002).