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Title: Revealing the preferred interlayer orientations and stackings of two-dimensional bilayer gallium selenide crystals

Journal Article · · Angewandte Chemie (International Edition)
 [1];  [2];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Escuela Politecnica Nacional, Quito (Ecuador)

Characterizing and controlling the interlayer orientations and stacking order of bilayer two-dimensional (2D) crystals and van der Waals (vdW) heterostructure is crucial to optimize their electrical and optoelectronic properties. The four polymorphs of layered gallium selenide (GaSe) that result from different layer stacking provide an ideal platform to study the stacking configurations in bilayer 2D crystals. Here, through a controllable vapor-phase deposition method we selectively grow bilayer GaSe crystals and investigate their two preferred 0° or 60° interlayer rotations. The commensurate stacking configurations (AA' and AB-stacking) in as-grown 2D bilayer GaSe crystals are clearly observed at the atomic scale and the Ga-terminated edge structure are identified for the first time by using atomic-resolution scanning transmission electron microscopy (STEM). Theoretical analysis of the interlayer coupling energetics vs. interlayer rotation angle reveals that the experimentally-observed orientations are energetically preferred among the bilayer GaSe crystal polytypes. Here, the combined experimental and theoretical characterization of the GaSe bilayers afforded by these growth studies provide a pathway to reveal the atomistic relationships in interlayer orientations responsible for the electronic and optical properties of bilayer 2D crystals and vdW heterostructures.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1185701
Journal Information:
Angewandte Chemie (International Edition), Vol. 54, Issue 9; ISSN 1433-7851
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 39 works
Citation information provided by
Web of Science

References (31)

Extraordinary Room-Temperature Photoluminescence in Triangular WS 2 Monolayers journal December 2012
Liquid Exfoliation of Layered Materials journal June 2013
Electronic band structure of GaSe(0001):  Angle-resolved photoemission and ab initio theory journal September 2003
Edge Nonlinear Optics on a MoS2 Atomic Monolayer journal May 2014
Role of Boundary Layer Diffusion in Vapor Deposition Growth of Chalcogenide Nanosheets: The Case of GeS journal September 2012
Hofstadter’s butterfly and the fractal quantum Hall effect in moiré superlattices journal May 2013
Electrical tuning of valley magnetic moment through symmetry control in bilayer MoS2 journal January 2013
Cloning of Dirac fermions in graphene superlattices journal May 2013
Large Hexagonal Bi- and Trilayer Graphene Single Crystals with Varied Interlayer Rotations journal January 2014
Direct observation of a widely tunable bandgap in bilayer graphene journal June 2009
Crystal structure and interatomic distances in GaSe journal October 1975
Commensuration and interlayer coherence in twisted bilayer graphene journal April 2010
Valley-dependent spin polarization in bulk MoS2 with broken inversion symmetry journal July 2014
Photoelectric properties of Bi2O3∕GaSe heterojunctions journal February 2009
Anomalously robust valley polarization and valley coherence in bilayer WS2 journal July 2014
Spin–layer locking effects in optical orientation of exciton spin in bilayer WSe2 journal January 2014
Efficient, tunable, and coherent 018–527-THz source based on GaSe crystal journal January 2002
Commensurate–incommensurate transition in graphene on hexagonal boron nitride journal April 2014
The chemistry of two-dimensional layered transition metal dichalcogenide nanosheets journal April 2013
The valley Hall effect in MoS2 transistors journal June 2014
Graphene moiré mystery solved? journal June 2011
Synthesis and Photoresponse of Large GaSe Atomic Layers journal May 2013
A Molecular MoS2 Edge Site Mimic for Catalytic Hydrogen Generation journal February 2012
Electronic structure of turbostratic graphene journal April 2010
Effective nonlinear GaSe crystal. Optical properties and applications journal May 2009
Large Hexagonal Bi- and Trilayer Graphene Single Crystals with Varied Interlayer Rotations journal January 2014
Epitaxy and Photoresponse of Two-Dimensional GaSe Crystals on Flexible Transparent Mica Sheets journal January 2014
Magnetic nanographite journal March 2003
Pulsed Laser Deposition of Photoresponsive Two-Dimensional GaSe Nanosheet Networks journal August 2014
Emergence of superlattice Dirac points in graphene on hexagonal boron nitride journal March 2012
Controlled Vapor Phase Growth of Single Crystalline, Two-Dimensional GaSe Crystals with High Photoresponse journal June 2014

Cited By (16)

Solution‐Processed GaSe Nanoflake‐Based Films for Photoelectrochemical Water Splitting and Photoelectrochemical‐Type Photodetectors journal January 2020
Toward the Growth of High Mobility 2D Transition Metal Dichalcogenide Semiconductors journal June 2019
Quantum Confinement and Gas Sensing of Mechanically Exfoliated GaSe journal November 2016
Booming Development of Group IV–VI Semiconductors: Fresh Blood of 2D Family journal June 2016
Giant and Linear Piezo-Phototronic Response in Layered GaSe Nanosheets journal February 2018
Phase-Engineered Growth of Ultrathin InSe Flakes by Chemical Vapor Deposition for High-Efficiency Second Harmonic Generation journal September 2018
Recent Advances in Quantum Effects of 2D Materials journal April 2019
Screw-Dislocation-Driven Growth Mode in Two Dimensional GaSe on GaAs(001) Substrates Grown by Molecular Beam Epitaxy journal November 2019
Large-grain MBE-grown GaSe on GaAs with a Mexican hat-like valence band dispersion journal January 2018
2D layered group IIIA metal chalcogenides: synthesis, properties and applications in electronics and optoelectronics journal January 2016
Synthesis and emerging properties of 2D layered III–VI metal chalcogenides journal December 2019
Ab initio phonon thermal transport in monolayer InSe, GaSe, GaS, and alloys journal October 2017
InSe monolayer: synthesis, structure and ultra-high second-harmonic generation journal March 2018
Mechanical properties of monolayer GaS and GaSe crystals journal December 2016
Hybrid Three-Dimensional Spiral WSe 2 Plasmonic Structures for Highly Efficient Second-Order Nonlinear Parametric Processes journal December 2018
Solution-processed GaSe nanoflake-based films for photoelectrochemical water splitting and photoelectrochemical-type photodetectors text January 2020

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