Results 41 to 50 of about 22,104 (179)

Quantum-Confined Electronic States arising from Moir\'e Pattern of MoS2-WSe2 Hetero-bilayers

, 2018
A two-dimensional (2D) hetero-bilayer system consisting of MoS2 on WSe2, deposited on epitaxial graphene, is studied by scanning tunneling microscopy and spectroscopy at temperatures of 5 and 80 K.
Cho, Kyeongjae, Feenstra, Randall M., Fölsch, Stefan, Jariwala, Bhakti, Lin, Yu-Chuan, Nie, Yifan, Pan, Yi, Robinson, Joshua A., Waters, Dacen, Zhang, Kehao   +9 more
core   +1 more source

Spin and Charge Control of Topological End States in Chiral Graphene Nanoribbons on a 2D Ferromagnet

Advanced Materials, EarlyView.
Chiral graphene nanoribbons on a ferromagnetic gadolinium‐gold surface alloy display tunable spin and charge states at their termini. Atomic work function variations and exchange fields enabe transitions between singlet, doublet, and triplet configurations.
Leonard Edens, Francisco Romero‐Lara, Trisha Sai, Kalyan Biswas, Manuel Vilas‐Varela, Thomas Frederiksen, Diego Peña, Fabian Schulz, Jose Ignacio Pascual   +8 more
wiley   +1 more source

Absence of superconductivity in ultra-thin layers of FeSe synthesized on a topological insulator [PDF]

, 2016
The structural and electronic properties of FeSe ultra-thin layers on Bi$_{2}$Se$_{3}$ have been investigated with a combination of scanning tunneling microscopy and spectroscopy and angle-resolved photoemission spectroscopy. The FeSe multi-layers, which
Arnold, Fabian, Bianchi, Marco, Bremholm, Martin, Dendzik, Maciej, Eich, Andreas, Ewen, Pascal R., Hofmann, Philip, Khajetoorians, Alexander A., Mi, Jian-Li, Michiardi, Matteo, Rollfing, Nils, Sanders, Charlotte, Wegner, Daniel   +12 more
core   +3 more sources

Resolving the Structural Duality of Graphene Grain Boundaries

Advanced Materials, EarlyView.
Cantilever ncAFM resolves the atomic structure of grain boundaries in graphene, revealing coexisting stable and metastable types. Both contain pentagon/heptagon defects, but metastable GBs show irregular geometries. Modeling shows metastable GBs form under compression, exhibiting vertical corrugation, while stable GBs are flat.
Haojie Guo, Emiliano Ventura‐Macías, Mariano D. Jiménez‐Sánchez, Nicoleta Nicoara, Pierre Mallet, Jean‐Yves Veuillen, Vincent T. Renard, Antonio J. Martínez‐Galera, Pablo Pou, Julio Gómez‐Herrero, Rubén Pérez, Iván Brihuega   +11 more
wiley   +1 more source

Exploring Wigner crystals in two-dimensional and moiré systems: from spectroscopy to theoretical modeling

Materials for Quantum Technology
Electron correlation effects have long been a central issue in condensed matter physics, particularly with the successful development of various two-dimensional materials.
Yifan Ke, Wei Hu
doaj   +1 more source

Strain-induced Evolution of Electronic Band Structures in a Twisted Graphene Bilayer

, 2013
Here we study the evolution of local electronic properties of a twisted graphene bilayer induced by a strain and a high curvature. The strain and curvature strongly affect the local band structures of the twisted graphene bilayer; the energy difference ...
A Altland, A Isacsson, A Luican, AF Young, AH Castro Neto, AS Mayorov, B Nanda, B Verberck, B Wang, C-H Park, C-H Park, D Guo, DL Miller, E Cerda, E Cerda, E Cerda, E Marinani, E McCann, E-A Kim, EY Andrei, F de Juan, F de Juan, F Guinea, F Guinea, F Guinea, F Guinea, G Li, G Semenoff, GM Rutter, H Yan, H Yan, I Brihuega, J Hicks, JMB Lopes dos Santos, K Kim, KK Gomes, KS Novoselov, L Meng, L Meng, M Killi, M Mucha-Kruczyński, M Sicot, M Sicot, M Yankowitz, MAH Vozmediano, N Levy, P Ghaemi, P San-Jose, SM Choi, T Gao, T Ohta, VH Pereira, VM Pereira, W Yan, Y Zhang, Z Li, Z-D Chu, ZF Wang   +57 more
core   +1 more source

Inverse scattering approach to multiwavelength Fabry-Pérot laser design [PDF]

, 2006
A class of multiwavelength Fabry-Pérot lasers is introduced where the spectrum is tailored through a patterning of the cavity effective index. The cavity geometry is obtained using an inverse scattering approach and can be designed such that the spacing ...
Amann, A., Anandarajah, Prince M., Barry, Liam P., Buckley, K., Fehse, R., O'Brien, S., O'Gorman, J., O'Reilly, E.P., Osborne, S., Patchell, J.   +9 more
core   +3 more sources

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

Advanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades, Pedro Hidalgo, David Maestre, Ruth Martínez‐Casado, Emilio Nogales, Beatriz Rodríguez, G. Cristian Vásquez, Bianchi Méndez   +7 more
wiley   +1 more source

Scanning tunneling microscopy and spectroscopy of nanoscale twisted bilayer graphene

, 2017
Nanoscale twisted bilayer graphene (TBG) is quite instable and will change its structure to Bernal (or AB-stacking) bilayer with a much lower energy. Therefore, the lack of nanoscale TBG makes its electronic properties not accessible in experiment up to ...
He, Lin, Jiang, Hua, Li, Si-Yu, Li, Xinqi, Liu, Haiwen, Wang, Wen-Xiao, Wu, Xiaosong, Zhang, Yu   +7 more
core   +1 more source

Flexoelectrically Induced Polar Topology in Twisted SrTiO3 Membranes

Advanced Materials, EarlyView.
Twisted SrTiO3 bilayers host polar vortices of flexoelectric origin, revealed through combined experiment and theory. By reconstructing polarization from the toroidal moment of strain gradients, the work establishes a 3D chiral state with broken inversion and mirror symmetries.
Isabel Tenreiro, Hugo Aramberri, Víctor Rouco, Gabriel Sánchez‐Santolino, Mariona Cabero, Fernando Gallego, David Sánchez‐Manzano, José M. González‐Calbet, Federico Mompeán, Mar García‐Hernández, Alberto Rivera‐Calzada, Jorge Íñiguez‐González, Carlos León, Jacobo Santamaría   +13 more
wiley   +1 more source