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Electronic structure of observed by angle-resolved photoemission spectroscopy

Ideta, S.; Yoshida, T.; Nakajima, M.; Malaeb, W.; Kito, H.; Eisaki, H.; Iyo, A.; Tomioka, Y.; Ito, T. (2014-05-28)

We have performed an angle-resolved photoemission spectroscopy (ARPES) study of BaNi2⁢𝑃2 that shows a superconducting transition at 𝑇𝑐 ∼ 2.5 K. We observed hole and electron Fermi surfaces (FSs) around the Brillouin ...
Evidence for excluding the possibility of 𝑑-wave superconducting-gap symmetry in Ba-doped KFe2As2

Ota, Y.; Okazaki, K.; Kotani, Y.; Shimojima, T.; Malaeb, W.; Watanabe, S.; Chen, C.-T.; Kihou, K. (2014-02-04)

We have investigated the superconducting (SC)-gap anisotropy for several Ba-doped KFe2As2 samples using laser-based angle-resolved photoemission spectroscopy. We show that the SC-gap anisotropy and node positions drastically ...
Evidence of a universal relation between electron-mode coupling and 𝑇�𝑐� in Ba1−𝑥�⁢K𝑥�⁢Fe2⁢As2 superconductor from laser angle-resolved photoemission spectroscopy

Malaeb, W.; Shimojima, T.; Ishida, Y.; Kondo, T.; Okazaki, K.; Ota, Y.; Ohgushi, K.; Kihou, K.; Lee, C. H. (2014-11-13)

We performed a laser angle-resolved photoemission spectroscopy (ARPES) study on a wide doping range of the Ba1−𝑥⁢K𝑥⁢Fe2⁢As2 (BaK) iron-based superconductor. We observed a robust low-binding energy (BE) kink structure ...
Pseudogap formation above the superconducting dome in iron pnictides

Shimojima, T.; Sonobe, T.; Malaeb, W.; Shinada, K.; Chainani, A.; Shin, S.; Yoshida, T.; Ideta, S.; Fujimori, A. (2014-01-03)

The nature of the pseudogap (PG) in high transition temperature (high 𝑇𝑐) superconducting cuprates has been a major issue in condensed matter physics. It is still unclear whether the high 𝑇𝑐 superconductivity can be ...
Anisotropy of the superconducting gap in the iron-based superconductor BaFe2(As1-xPx)2

Yoshida, T.; Ideta, S.; Shimojima, T.; Malaeb, W.; Shinada, K.; Suzuki, H.; Nishi, I.; Fujimori, A.; Ishizaka, K. (2014-12-03)

We report peculiar momentum-dependent anisotropy in the superconducting gap observed by angle-resolved photoemission spectroscopy in BaFe2(As1-xPx)2 (x = 0.30, Tc = 30 K). Strongly anisotropic gap has been found only in ...
Comparative Civil-Military Cooperation Impact on National Security: Options for Lebanon

Ghayad, Samer (Lebanese American University, 2025-01-03)

Throughout history, nations have faced a variety of challenges, ranging from crises to civil wars, and economic collapses. Addressing such societal discontent requires strategic governmental intervention. One effective ...
STEM through Street Sports for Young Adults

Fathalla, Salwa (Lebanese American University, 2024-12-18)

This study explores the impact of an Integrated STEM (iSTEM) curriculum, which combines Science, Technology, Engineering, and Mathematics (STEM) education with Street Sports Activities (SSA), on Lebanese youth aged 18-24. ...
Strongly Spin-Orbit Coupled Two-Dimensional Electron Gas Emerging near the Surface of Polar Semiconductors

Sakano, M.; Bahramy, M. S.; Katayama, A.; Shimojima, T.; Murakawa, H.; Kaneko, Y.; Malaeb, W.; Shin, S.; Ono, K. (2013-03-07)

We investigate the two-dimensional highly spin-polarized electron accumulation layers commonly appearing near the surface of 𝑛-type polar semiconductors BiTe⁢𝑋 (𝑋 =I, Br, and Cl) by angular-resolved photoemission ...
Octet-Line Node Structure of Superconducting Order Parameter in KFe2As2

Okazaki, K.; Ota, Y.; Kotani, Y.; Malaeb, W.; Ishida, Y.; Shimojima, T.; Kiss, T.; Watanabe, S.; Chen, C.-T. (2012-09-14)

In iron-pnictide superconductivity, the interband interaction between the hole and electron Fermi surfaces (FSs) is believed to play an important role. However, KFe2As2 has three zone-centered hole FSs and no electron FS ...
Effects of Zn substitution on the electronic structure of BaFe2As2 revealed by angle-resolved photoemission spectroscopy

Ideta, S.; Yoshida, T.; Nakajima, M.; Malaeb, W.; Shimojima, T.; Ishizaka, K.; Fujimori, A.; Kimigashira, H.; Ono, K. (2013-05-31)

In Fe-based superconductors, electron doping is often realized by the substitution of transition-metal atoms for Fe. In order to investigate how the electronic structure of the parent compound is influenced by Zn substitution, ...
Anomalous Dressing of Dirac Fermions in the Topological Surface State of Bi2⁢Se3, Bi2⁢Te3, and Cu-Doped Bi2⁢Se3

Kondo, Takeshi; Nakashima, Y.; Ota, Y.; Ishida, Y.; Malaeb, W.; Okazaki, K.; Shin, S.; Kriener, M.; Sasaki, Satoshi; Segawa, Kouji; Ando, Yoichi (2013-05-23)

Quasiparticle dynamics on the topological surface state of Bi2⁢Se3, Bi2⁢Te3, and superconducting Cu𝑥⁢Bi2⁢Se3 are studied by 7 eV laser-based angle resolved photoemission spectroscopy. We find strong mode couplings in the ...
Angle-resolved photoemission study on the superconducting iron-pnictides of BaFe2(As,P)2 with low energy photons

Shimojima, T.; Sakaguchi, F.; Ishizaka, K.; Ishida, Y.; Malaeb, W.; Yoshida, T.; Ideta, S.; Fujimori, A.; Kiss, T.; Okawa, M. (2012-04)

We investigate the kz dispersion in the hole Fermi surfaces (FSs) and the superconducting (SC) gaps of BaFe 2(As 0.65P 0.35) 2 by employing bulk-sensitive angle-resolved photoemission spectroscopy (ARPES) with low energy ...
Observation of two fine structures related to the hidden order in the spectral functions of URu2Si2

Yoshida, Rikiya; Fukui, Masaki; Haga, Yoshinori; Yamamoto, Etsuji; Onuki, Yoshichika; Okawa, Mario; Malaeb, Walid; Shin, Shik; Muraoka, Yuji (2012-06-12)

We studied the spectral functions of URu2Si2 in the hidden-order state by means of ultrahigh-resolution angle-resolved photoemission spectroscopy. High signal-to-noise ratio data uncover the existence of two anomalous fine ...
Abrupt change in the energy gap of superconducting Ba1−𝑥�K𝑥�Fe2As2 single crystals with hole doping

Malaeb, W.; Shimojima, T.; Ishida, Y.; Okazaki, K.; Ota, Y.; Ohgushi, K.; Kihou, K.; Saito, T.; Lee, C. H. (2012-10-10)

We performed a laser angle-resolved photoemission spectroscopy (ARPES) study on a wide doping range of Ba1−𝑥K𝑥Fe2As2 (BaK) and precisely determined the doping evolution of the superconducting gaps in this compound. The ...
Three-Dimensional Electronic Structure of Superconducting Iron Pnictides Observed by Angle-Resolved Photoemission Spectroscopy

Malaeb, Walid; Yoshida, Teppei; Fujimori, Atsushi; Kubota, Masato; Ono, Kanta; Kihou, Kunihiro; Shirage, Parasharam M.; Kito, Hijiri (2009-11-25)

We have performed an angle-resolved photoemission spectroscopy (ARPES) study of the undoped and electron-doped iron pnictides BaFe 2- x Co x As 2 (Ba122) ( x = 0, 0.14) and studied the Fermi surfaces (FSs) and band dispersions ...
Common Origin of the Circular-Dichroism Pattern in Angle-Resolved Photoemission Spectroscopy of SrTiO3 and Cu𝑥��⁢Bi2⁢Se3

Ishida, Y.; Kanto, H.; Kikkawa, A.; Taguchi, Y.; Ito, Y.; Ota, Y.; Okazaki, K.; Malaeb, W. (2011-08-09)

Circular dichroism in the angular distribution of photoelectrons from SrTiO3:Nb and Cu𝑥⁢Bi2⁢Se3 is investigated by 7-eV laser angle-resolved photoemission spectroscopy. In addition to the well-known node that occurs in ...
A Community at Stake: The Mental Health Situation of Migrant Workers in Lebanon

Al Riachi, Rhea (Lebanese American University, 2024-11-11)

The looming mental healthcare challenges in Lebanon, particularly across the migrant’s community, has contributed to increased inequalities in the host country. The dominant reasoning of this trend is the distressed economic ...
ACSS2 Promotes Proliferation and Invasiveness of Skov-3 and PA-1 Ovarian Cancer Cell Lines under Hypoxia

Mroweh, Ola (Lebanese American University, 2024-12-12)

Ovarian cancer is the eighth most common malignancy among women worldwide. Despite advances in treatment, rising cases of chemoresistance and associated morbidity continue to pose significant challenges, highlighting the ...
Educators Perception on Integrating Virtual Reality in Classrooms: A Lebanese Context

Aziz, Nivine E. (Lebanese American University, 2024-12-18)

Today’s generation exhibits a strong affinity for video games, presenting an opportunity to harness this interest for educational purposes. Integrating gaming elements into education has the potential to captivate students ...
Investigating the Role of Acetyl-CoA Synthetase Short Chain Family Member 2 (ACSS2) in Inflammatory Bowel Disease: Expression in Clinical Samples and Insights from In Vitro Models

Mezher, Nawal (Lebanese American University, 2025-01-15)

Inflammatory bowel disease (IBD), encompassing Ulcerative Colitis (UC) and Crohn’s Disease (CD), is characterized by chronic gastrointestinal inflammation driven by genetic, environmental, immune, and microbial factors. ...

Now showing items 61-80 of 8458

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