Thermally Induced 2D Alloy-Heterostructure Transformation in Quaternary Alloys

Bibliographische Detailangaben
Veröffentlicht in:	Advanced materials (Deerfield Beach, Fla.). - 1998. - 30(2018), 45 vom: 02. Nov., Seite e1804218
1. Verfasser:	Susarla, Sandhya (VerfasserIn)
Weitere Verfasser:	Hachtel, Jordan A, Yang, Xiting, Kutana, Alex, Apte, Amey, Jin, Zehua, Vajtai, Robert, Idrobo, Juan Carlos, Lou, Jun, Yakobson, Boris I, Tiwary, Chandra Sekhar, Ajayan, Pulickel M
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2018
Zugriff auf das übergeordnete Werk:	Advanced materials (Deerfield Beach, Fla.)
Schlagworte:	Journal Article alloys density functional theory heterostructures phase diagrams phase stability scanning transmission electron microscopy

Beschreibung
Zusammenfassung:	© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Composition and phase specific 2D transition metal dichalogenides (2D TMDs) with a controlled electronic and chemical structure are essential for future electronics. While alloying allows bandgap tunability, heterostructure formation creates atomically sharp electronic junctions. Herein, the formation of lateral heterostructures from quaternary 2D TMD alloys, by thermal annealing, is demonstrated. Phase separation is observed through photoluminescence and Raman spectroscopy, and the sharp interface of the lateral heterostructure is examined via scanning transmission electron microscopy. The composition-dependent transformation is caused by existence of miscibility gap in the quaternary alloys. The phase diagram displaying the miscibility gap is obtained from the reciprocal solution model based on density functional theory and verified experimentally. The experiments show direct evidence of composition-driven heterostructure formation in 2D atomic layer systems
Beschreibung:	Date Completed 08.11.2018 Date Revised 30.09.2020 published: Print-Electronic Citation Status PubMed-not-MEDLINE
ISSN:	1521-4095
DOI:	10.1002/adma.201804218