Thermally Induced 2D Alloy-Heterostructure Transformation in Quaternary Alloys

Susarla, Sandhya; 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.

doi:10.1002/adma.201804218

Title: Thermally Induced 2D Alloy-Heterostructure Transformation in Quaternary Alloys

Abstract

Abstract 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.

Authors:

Susarla, Sandhya ^[1];

^[2]; Yang, Xiting ^[1]; Kutana, Alex ^[1]; Apte, Amey ^[1]; Jin, Zehua ^[1]; Vajtai, Robert ^[1];

^[2]; Lou, Jun ^[1]; Yakobson, Boris I. ^[1];

^[3]; Ajayan, Pulickel M. ^[1]

Rice Univ., Houston, TX (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Rice Univ., Houston, TX (United States); Indian Institute of Technology, West Bengal (India)

Publication Date:: Mon Sep 10 00:00:00 EDT 2018

Research Org.:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1493999

Alternate Identifier(s):: OSTI ID: 1469232

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Advanced Materials

Additional Journal Information:: Journal Volume: 30; Journal Issue: 45; Journal ID: ISSN 0935-9648

Publisher:: Wiley

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; alloys; density functional theory; heterostructures; phase diagrams; phase stability; scanning transmission electron microscopy

Citation Formats


                    Susarla, Sandhya, Hachtel, Jordan A., Yang, Xiting, Kutana, Alex, Apte, Amey, Jin, Zehua, Vajtai, Robert, Idrobo, Juan Carlos, Lou, Jun, Yakobson, Boris I., Tiwary, Chandra Sekhar, and Ajayan, Pulickel M. Thermally Induced 2D Alloy-Heterostructure Transformation in Quaternary Alloys.  United States: N. p., 2018. 
Web.  doi:10.1002/adma.201804218.

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                    Susarla, Sandhya, 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. Thermally Induced 2D Alloy-Heterostructure Transformation in Quaternary Alloys.  United States.  https://doi.org/10.1002/adma.201804218

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                    Susarla, Sandhya, Hachtel, Jordan A., Yang, Xiting, Kutana, Alex, Apte, Amey, Jin, Zehua, Vajtai, Robert, Idrobo, Juan Carlos, Lou, Jun, Yakobson, Boris I., Tiwary, Chandra Sekhar, and Ajayan, Pulickel M. Mon .  
"Thermally Induced 2D Alloy-Heterostructure Transformation in Quaternary Alloys".  United States.  https://doi.org/10.1002/adma.201804218.  https://www.osti.gov/servlets/purl/1493999.

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@article{osti_1493999,

  title        = {Thermally Induced 2D Alloy-Heterostructure Transformation in Quaternary Alloys},

  author       = {Susarla, Sandhya and Hachtel, Jordan A. and Yang, Xiting and Kutana, Alex and Apte, Amey and Jin, Zehua and Vajtai, Robert and Idrobo, Juan Carlos and Lou, Jun and Yakobson, Boris I. and Tiwary, Chandra Sekhar and Ajayan, Pulickel M.},

  abstractNote = {Abstract 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.},

  doi          = {10.1002/adma.201804218},

  journal      = {Advanced Materials},

  number       = 45,

  volume       = 30,

  place        = {United States},

  year         = {Mon Sep 10 00:00:00 EDT 2018},

  month        = {Mon Sep 10 00:00:00 EDT 2018}

}

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Widely tunable Bi ₂ Se ₃ /transition metal dichalcogenide 2D heterostructures for write-read-erase-reuse applications
journal, August 2019

Hennighausen, Zachariah; Bilgin, Ismail; Casey, Colin
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Title: Thermally Induced 2D Alloy-Heterostructure Transformation in Quaternary Alloys

Abstract

Citation Formats

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