Article
Chemistry, Multidisciplinary
Meng-Kai Lin, Guan-Hao Chen, Ciao-Lin Ho, Wei-Chen Chueh, Joseph Andrew Hlevyack, Chia-Nung Kuo, Tsu-Yi Fu, Juhn-Jong Lin, Chin Shan Lue, Wen-Hao Chang, Noriaki Takagi, Ryuichi Arafune, Tai-Chang Chiang, Chun-Liang Lin
Summary: Monolayer transition metal dichalcogenides show tunability in electronic properties, with bandgap modulation possible through control of tunneling current. Monolayer PtTe2 exhibits a reversible semiconductor-to-metal transition at moderate tunneling current, attributed to its surface electronic structure coupling with the tunneling tip.
Article
Chemistry, Multidisciplinary
Kai Zhang, Marie-Christine Hanf, Romain Bernard, Yves Borensztein, Hervei Cruguel, Andrea Resta, Yves Garreau, Alina Vlad, Alessandro Coati, Davide Sciacca, Bruno Grandidier, Mickael Derivaz, Carmelo Pirri, Philippe Sonnet, Reigis Stephan, Geoffroy Prevot
Summary: Through scanning tunneling microscopy (STM), surface X-ray diffraction (SXRD), and density functional theory, we have revealed a Ge-induced (root 109 x root 109)R +/- 24.5 degrees reconstruction on Ag(111). We have demonstrated the possibility of solving a giant surface reconstruction using SXRD and STM. The reconstructed structure consists of Ge pentagons, hexagons, and heptagons, with the inclusion of a few dispersed Ag atoms.
Article
Materials Science, Coatings & Films
Hanno D. Goldbach, Joachim Wollschlaeger
Summary: Reactive molecular beam epitaxy of NiO on Ag(001) has been studied, revealing different growth mechanisms of NiO thin films formed at different temperatures, with the later stages of epitaxy controlled by mosaic processes induced by interface dislocations.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2022)
Review
Nanoscience & Nanotechnology
S. Colonna, R. Flammini, F. Ronci
Summary: This paper reviews the research activity of the author's group in the field of silicene synthesis and properties, focusing on the interaction between silicon deposition and silicon substrate, and discussing the debated formation of silicene from unsaturated silicon compounds.
Article
Chemistry, Multidisciplinary
Ricardo Javier Pena Roman, Remi Bretel, Delphine Pommier, Luis Enrique Parra Lopez, Etienne Lorchat, Elizabeth Boer-Duchemin, Gerald Dujardin, Andrei G. Borisov, Luiz Fernando Zagonel, Guillaume Schull, Stephane Berciaud, Eric Le Moal
Summary: This study demonstrates the local and electrical control of photoluminescence in monolayer WS2 using a nonplasmonic tip and tunneling current of a scanning tunneling microscope. The results show that short-range photoluminescence quenching is present due to near-field electromagnetic effects, independent of the bias voltage. Additionally, a bias-voltage-dependent long-range photoluminescence quenching is observed when the sample is positively biased.
Article
Chemistry, Multidisciplinary
Qilong Wu, Xiaoshuai Fu, Ke Yang, Hongyu Wu, Li Liu, Li Zhang, Yuan Tian, Long-Jing Yin, Wei-Qing Huang, Wen Zhang, Ping Kwan Johnny Wong, Lijie Zhang, Andrew T. S. Wee, Zhihui Qin
Summary: This study demonstrates a practical approach to producing highly crystalline monolayer MoSe2 using high-temperature-annealed Au foil as a weakly interacting substrate for atmospheric pressure chemical vapor deposition. The low-temperature scanning tunneling microscopy/spectroscopy measurements reveal a honeycomb structure of MoSe2 with a quasi-particle bandgap of 1.96 eV. The weak coupling between the Au(100) surface and MoSe2 is critical for easy transfer of monolayers to another host substrate.
Article
Chemistry, Multidisciplinary
Linghao Yan, Orlando J. Silveira, Benjamin Alldritt, Ondrej Krejci, Adam S. Foster, Peter Liljeroth
Summary: The successful fabrication of a 2D monolayer Cu-dicyanoanthracene MOF on an epitaxial graphene surface with long-range order and the study of its structural and electronic properties using low-temperature scanning tunneling microscopy and spectroscopy, along with density-functional theory calculations, show promise for future applications in electronic devices. The ability to access multiple molecular charge states in the 2D MOF using tip-induced local electric fields suggests potential for fabricating and characterizing 2D MOFs with engineered electronic states.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Tianchao Niu, Miao Zhou
Summary: Boron, the lightest metalloid element, has similar characteristics to carbon in planar and cage molecules. Recent studies have focused on the various structures of mono- and bi-layer boron and their potential applications in materials science. This review highlights the latest achievements in the epitaxial growth of bilayer borophene on noble metal surfaces, discussing the roles of substrate and growth conditions. Bilayer borophene exhibits superior properties compared to single-layer borophene, but its synthesis remains challenging and requires further research.
Article
Chemistry, Multidisciplinary
Bo Zhu, Yanwei Wu, Zeyi Zhou, Wenjie Zheng, Yuchen Hu, Yongfei Ji, Lingyao Kong, Rui Zhang
Summary: In this work, large electronic tuning on a WSe2 monolayer is achieved by using different facets of a Au-foil substrate, forming in-plane p-n junctions with remarkable built-in electric fields. This facet-dependent tuning effect is directly visualized by scanning tunneling microscopy and differential conductance spectroscopy. The atomic arrangement of the Au facet effectively changes the interfacial coupling and charge transfer, resulting in different magnitudes of charge doping in WSe2.
Article
Chemistry, Multidisciplinary
Youness Kaddar, Wei Zhang, Hanna Enriquez, Yannick J. Dappe, Azzedine Bendounan, Gerald Dujardin, Omar Mounkachi, Abdallah El Kenz, Abdelilah Benyoussef, Abdelkader Kara, Hamid Oughaddou
Summary: Blue phosphorene, an allotrope of black phosphorene, exhibits Dirac fermions similar to graphene when grown on a Cu(111) surface. This suggests that high-speed electronic devices based on ballistic transport at room temperature could be achieved using blue phosphorene.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Physics, Multidisciplinary
Haoyu Dong, Le Lei, Shuya Xing, Jianfeng Guo, Feiyue Cao, Shangzhi Gu, Yanyan Geng, Shuo Mi, Hanxiang Wu, Yan Jun Li, Yasuhiro Sugawara, Fei Pang, Wei Ji, Rui Xu, Zhihai Cheng
Summary: In this study, a systematic investigation of TMC monolayer AgTe fabricated by direct depositing Te on the surface of Ag(111) and annealing is reported. The AgTe monolayer with few intrinsic defects can serve as a template for the growth of Te film, showing potential for the epitaxial growth of 2D materials and the study of novel physical properties. The observation of Te atoms in chain-like structures on top of the bottom Te film provides valuable insights for future quantum devices.
FRONTIERS OF PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Yu Zhang, Ying Su, Lin He
Summary: Vortices in graphene induced by single carbon defects can be considered as atomic-scale vortices mediated by pseudospin, with angular momenta of +2 and -2. Quantum interference measurements show that these vortices cancel each other, resulting in zero total angular momentum or aggregate chirality similar to a single vortex of the majority.
Article
Chemistry, Physical
Shigeru Kaku, Kota L. Hiwatari, Junji Yoshino
Summary: By optimizing the surface cleaning procedures and growth conditions, we investigated the surface structure of strained-alpha-Sn layers grown on InSb(001) surfaces, revealing that the (2 x 2) diffraction patterns are attributed to double domain (2 x 1) reconstructed surfaces rotated 90 degrees with respect to each other.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Zhongxu Wei, Cui Ding, Yujie Sun, Lili Wang, Qi-Kun Xue
Summary: Spatially uniform high-temperature superconducting films are important for studying new physics and applications. By using a new method, monolayer FeSexTe1-x films were successfully fabricated on SrTiO3(001) substrates, demonstrating atomic-level uniformity of element distribution and well-defined superconducting gaps. Compared to traditional methods, monolayer FeSe films exhibit fewer defects and higher superfluid density.
Article
Nanoscience & Nanotechnology
Guglielmo Albani, Michele Capra, Alessandro Lodesani, Alberto Calloni, Gianlorenzo Bussetti, Marco Finazzi, Franco Ciccacci, Alberto Brambilla, Lamberto Duo, Andrea Picone
Summary: This study investigates the morphology and electronic properties of C60 on a ZnTPP substrate, finding that C60 forms compact and well-ordered hexagonal domains on top of the ZnTPP layer with weak coupling between the two materials. The energy band structure of C60 also differs significantly from that of C60 films directly stabilized on metal surfaces.
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Anastasiia Moskaltsova, Jan Krieft, Dominik Graulich, Tristan Matalla-Wagner, Timo Kuschel
Article
Physics, Applied
Hyejin Jang, Luca Marnitz, Torsten Huebner, Johannes Kimling, Timo Kuschel, David G. Cahill
PHYSICAL REVIEW APPLIED
(2020)
Article
Physics, Applied
Jan Krieft, Dominik Graulich, Anastasiia Moskaltsova, Laurence Bouchenoire, Sonia Francoual, Timo Kuschel
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2020)
Article
Physics, Applied
Robin Silber, Daniel Kral, Ondrej Stejskal, Takahide Kubota, Yasuo Ando, Jaromir Pistora, Martin Veis, Jaroslav Hamrle, Timo Kuschel
APPLIED PHYSICS LETTERS
(2020)
Article
Physics, Applied
A. Rastogi, Z. Li, A. Singh, S. Regmi, T. Peters, P. Bougiatioti, D. Carsten ne Meier, J. B. Mohammadi, B. Khodadadi, T. Mewes, R. Mishra, J. Gazquez, A. Y. Borisevich, Z. Galazka, R. Uecker, G. Reiss, T. Kuschel, A. Gupta
PHYSICAL REVIEW APPLIED
(2020)
Article
Physics, Applied
Dominik Graulich, Jan Krieft, Anastasiia Moskaltsova, Johannes Demir, Tobias Peters, Tobias Pohlmann, Florian Bertram, Joachim Wollschlaeger, Jose R. L. Mardegan, Sonia Francoual, Timo Kuschel
Summary: X-ray resonant magnetic reflectivity (XRMR) allows for the simultaneous measurement of structural, optical, and magneto-optic properties and depth profiles of thin film samples. A quantitative comparison of magnetic properties observed using XRMR and x-ray magnetic circular dichroism (XMCD) shows good agreement, indicating the importance of XRMR in providing reliable spin depth profiles for spintronic and spin caloritronic transport phenomena at magnetic interfaces.
APPLIED PHYSICS LETTERS
(2021)
Correction
Physics, Applied
Dominik Graulich, Jan Krieft, Anastasiia Moskaltsova, Johannes Demir, Tobias Peters, Tobias Pohlmann, Florian Bertram, Joachim Wollschlaeger, Jose R. L. Mardegan, Sonia Francoual, Timo Kuschel
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Physical
Anna Gruenebohm, Andreas Huetten, Anna E. Boehmer, Jan Frenzel, Ilya Eremin, Ralf Drautz, Inga Ennen, Luana Caron, Timo Kuschel, Frank Lechermann, Dario Anselmetti, Thomas Dahm, Frank Weber, Kai Rossnagel, Gabi Schierning
Summary: This article presents a unified framework to understand the properties and functionalities of displacive phase transition materials, by identifying similarities, defining a unified phenomenological description, and introducing symmetry-breaking mechanisms. This framework aims to bring together experimental and theoretical knowledge across disciplines to unravel important mechanistic understanding about phase transitions in various materials. Connecting structural and electronic phenomena to functional properties may lead to innovative applications based on these materials.
ADVANCED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Tobias Pohlmann, Florian Bertram, Jannis Thien, Jari Rodewald, Kevin Ruwisch, Timo Kuschel, Eugen Weschke, Karsten Kuepper, Joachim Wollschlaeger
Summary: We investigated the structural and magnetic properties of Fe3O4/MgO(001) and Fe3O4/NiO/MgO(001) interfaces using magneto-optical depth profiles and charge-transfer multiplet simulations. The results show that the Fe3O4/MgO(001) interface has a fully intact magnetic order, while the Fe3O4/NiO/MgO(001) interface may have an intermixed (Ni, Fe)O layer.
Article
Materials Science, Multidisciplinary
G. R. Hoogeboom, T. Kuschel, G. E. W. Bauer, M. Mostovoy, A. Kimel, B. J. van Wees
Summary: This study investigates spin Hall magnetoresistance and spin Seebeck effect in a rare-earth antiferromagnetic DyFeO3 single crystal with a thin Pt film contact. The experimental results reveal the unique properties of SMR and SSE in this material, providing insight into spin reorientation phase transitions and sublattice magnetizations. Overall, the combination of SMR and SSE proves to be a simple and efficient tool for studying magnetic phenomena in materials.
Article
Materials Science, Multidisciplinary
Geert R. Hoogeboom, Geert-Jan N. Sint Nicolaas, Andreas Alexander, Olga Kuschel, Joachim Wollschlaeger, Inga Ennen, Bart J. van Wees, Timo Kuschel
Summary: In spin-transport experiments with antiferromagnetic material NiO, the spin current transmissivity is affected by magnetic fluctuations, peaking at the Neel temperature and decreasing as the temperature lowers. Thermal signals show an unexpected upturn below 100 K, possibly due to a change in thermal conductivity. Temperature and magnetic field dependence of the signals are similar to bulk NiO, suggesting that NiO itself contributes to thermally induced spin currents.
Article
Materials Science, Multidisciplinary
Stephan Gepraegs, Christoph Klewe, Sibylle Meyer, Dominik Graulich, Felix Schade, Marc Schneider, Sonia Francoual, Stephen P. Collins, Katharina Ollefs, Fabrice Wilhelm, Andrei Rogalev, Yves Joly, Sebastian T. B. Goennenwein, Matthias Opel, Timo Kuschel, Rudolf Gross
Article
Materials Science, Multidisciplinary
Tobias Pohlmann, Timo Kuschel, Jari Rodewald, Jannis Thien, Kevin Ruwisch, Florian Bertram, Eugen Weschke, Padraic Shafer, Joachim Wollschlaeger, Karsten Kuepper
Article
Materials Science, Multidisciplinary
Ankan Mukhopadhyay, Sarathlal Koyiloth Vayalil, Dominik Graulich, Imran Ahamed, Sonia Francoual, Arti Kashyap, Timo Kuschel, P. S. Anil Kumar
Article
Materials Science, Multidisciplinary
Robin Silber, Ondrej Stejskal, Lukas Beran, Petr Cejpek, Roman Antos, Tristan Matalla-Wagner, Jannis Thien, Olga Kuschel, Joachim Wollschlaeger, Martin Veis, Timo Kuschel, Jaroslav Hamrle
