TY - JOUR
T1 - Structural Metastability in Chalcogenide Semiconductors
T2 - The Role of Chemical Bonding
AU - Kolobov, Alexander V.
AU - Saito, Yuta
AU - Fons, Paul
AU - Krbal, Milos
N1 - Funding Information:
This work was partially supported by the Russian Foundation for Basic Research, grant no. 19‐53‐26017 (A.V.K.), the Czech Science Foundation, grant nos. 20‐23392J and 19‐17997S (M.K.), and JSPS KAKENHI, grant no. 19H02619 (Y.S., P.F.).
Publisher Copyright:
© 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2020/11
Y1 - 2020/11
N2 - This article reviews metastability in three different classes of chalcogenides—chalcogenide glasses, phase-change alloys, and transition-metal dichalcogenides—with the focus on the relationship between structural metastability and the nature of chemical bonding. While the presence of lone-pair electrons in chalcogenide glasses enables a variety of bond switching processes, the existence of resonant (metavalent) bonding in phase-change alloys is key to the transformation between the crystalline and amorphous states. Strong covalent bonds in 2D transition-metal dichalcogenides limit the transformation to slides and buckling of atomic planes without major bond rupture. It is proposed that combining different kinds of local bonding may be an efficient way to engineer amorphous chalcogenides with desired properties.
AB - This article reviews metastability in three different classes of chalcogenides—chalcogenide glasses, phase-change alloys, and transition-metal dichalcogenides—with the focus on the relationship between structural metastability and the nature of chemical bonding. While the presence of lone-pair electrons in chalcogenide glasses enables a variety of bond switching processes, the existence of resonant (metavalent) bonding in phase-change alloys is key to the transformation between the crystalline and amorphous states. Strong covalent bonds in 2D transition-metal dichalcogenides limit the transformation to slides and buckling of atomic planes without major bond rupture. It is proposed that combining different kinds of local bonding may be an efficient way to engineer amorphous chalcogenides with desired properties.
KW - chalcogenide glasses
KW - dative bonds
KW - lone-pair electrons
KW - phase-change alloys
KW - resonant (metavalent) bonding
KW - transition-metal dichalcogenides
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U2 - 10.1002/pssb.202000138
DO - 10.1002/pssb.202000138
M3 - Article
AN - SCOPUS:85087491667
SN - 0370-1972
VL - 257
JO - Physica Status Solidi (B) Basic Research
JF - Physica Status Solidi (B) Basic Research
IS - 11
M1 - 2000138
ER -