skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Enhanced Spontaneous Polarization in Ultrathin SnTe Films with Layered Antipolar Structure

Journal Article · · Advanced Materials
 [1];  [2];  [3];  [4];  [4];  [4];  [3];  [3];  [3];  [5];  [5];  [6];  [2]; ORCiD logo [4]
  1. Max-Planck Inst. of Microstructure Physics Weinberg, Halle (Germany); Tsinghua Univ., Beijing (China)
  2. Univ. of Arkansas, Fayetteville, AR (United States)
  3. Tsinghua Univ., Beijing (China)
  4. Max-Planck Inst. of Microstructure Physics Weinberg, Halle (Germany)
  5. Tsinghua Univ., Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
  6. Tsinghua Univ., Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China); RIKEN Center for Emergent Matter Science (CEMS) – Wako, Saitama (Japan)

2D SnTe films with a thickness of as little as 2 atomic layers (ALs) have recently been shown to be ferroelectric with in–plane polarization. Remarkably, they exhibit transition temperatures (Tc) much higher than that of bulk SnTe. Here, combining molecular beam epitaxy, variable temperature scanning tunneling microscopy, and ab initio calculations, the underlying mechanism of the Tc enhancement is unveiled, which relies on the formation of γ–SnTe, a van der Waals orthorhombic phase with antipolar inter–layer coupling in few–AL thick SnTe films. In this phase, 4n – 2 AL (n = 1, 2, 3…) thick films are found to possess finite in–plane polarization (space group Pmn21), while 4n AL thick films have zero total polarization (space group Pnma). Above 8 AL, the γ–SnTe phase becomes metastable, and can convert irreversibly to the bulk rock salt phase as the temperature is increased. This finding unambiguously bridges experiments on ultrathin SnTe films with predictions of robust ferroelectricity in GeS–type monochalcogenide monolayers. Here, the observed high transition temperature, together with the strong spin–orbit coupling and van der Waals structure, underlines the potential of atomically thin γ–SnTe films for the development of novel spontaneous polarization–based devices.

Research Organization:
Univ. of Arkansas, Fayetteville, AR (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); German Research Foundation (DFG); National Natural Science Foundation of China (NSFC); Ministry of Science and Technology of China
Grant/Contract Number:
SC0016139; 1812/2‐1; 51561145005; 2016YFA0301002
OSTI ID:
1763381
Alternate ID(s):
OSTI ID: 1480547
Journal Information:
Advanced Materials, Vol. 31, Issue 3; ISSN 0935-9648
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 85 works
Citation information provided by
Web of Science

References (53)

Carrier-Concentration-Dependent Phase Transition in SnTe journal September 1976
Coupled Spin and Valley Physics in Monolayers of MoS 2 and Other Group-VI Dichalcogenides journal May 2012
Observation of a topological crystalline insulator phase and topological phase transition in Pb1−xSnxTe journal January 2012
Intrinsic Ferroelasticity and/or Multiferroicity in Two-Dimensional Phosphorene and Phosphorene Analogues journal April 2016
On the Structure of Germanium Selenide and Related Binary IV/VI Compounds journal September 1965
Observation of surface states on heavily indium-doped SnTe(111), a superconducting topological crystalline insulator journal February 2016
Giant piezoelectricity of monolayer group IV monochalcogenides: SnSe, SnS, GeSe, and GeS journal October 2015
Correlating Josephson supercurrents and Shiba states in quantum spins unconventionally coupled to superconductors journal February 2021
First-principles calculation of highly asymmetric structure in scanning-tunneling-microscopy images of graphite journal May 1988
Observation of soft TO-phonon in SnTe by Raman scattering journal July 1977
A map for phase-change materials journal November 2008
Topological crystalline insulator states in Pb(1-x)Sn(x)Se text January 2012
Phase Transition in SnTe with Low Carrier Concentration journal February 1975
Discovery of robust in-plane ferroelectricity in atomic-thick SnTe journal July 2016
Enhancement of Thermoelectric Efficiency in PbTe by Distortion of the Electronic Density of States journal July 2008
Topological crystalline insulator states in Pb1−xSnxSe journal September 2012
Theory of persistent, p-type, metallic conduction in c-GeTe journal July 2005
Topological crystalline insulators in the SnTe material class journal January 2012
An exchange functional that tests the robustness of the plasmon description of the van der Waals density functional text January 2013
The valley Hall effect in MoS2 transistors journal June 2014
Ultralow thermal conductivity and high thermoelectric figure of merit in SnSe crystals journal April 2014
Neutron diffraction study of the structural phase transition in SnS and SnSe journal January 1986
Revealing Surface States in In-Doped SnTe Nanoplates with Low Bulk Mobility journal May 2015
Two-Dimensional Disorder in Black Phosphorus and Monochalcogenide Monolayers journal February 2016
The crystal structure of IV-VI compounds. I. Classification and description journal September 1980
A review of the semiconductor properties of PbTe, PbSe, PbS and PbO journal December 1969
Quasiparticle scattering from topological crystalline insulator SnTe (001) surface states text January 2014
Interplay of polarizability and ionicity in IV-VI compounds journal December 1989
Polarization and valley switching in monolayer group-IV monochalcogenides journal July 2016
Theory and Application for the Scanning Tunneling Microscope journal June 1983
Effects of Resonance Bonding on the Properties of Crystalline and Amorphous Semiconductors journal July 1973
X-ray study of the structural phase transition in Sn x Ge 1 x Te journal November 1978
The Crystal Lattice of Germano Sulphide, GeS journal June 1932
X-Ray Structure Investigation of Single Crystals of SnTe Doped with the Various 3 d Transition Elements of Cr, Mn, Fe, Co and Ni journal November 1988
The SIESTA method for ab initio order- N materials simulation journal March 2002
Experimental realization of a topological crystalline insulator in SnTe journal September 2012
Simulated scanning tunneling microscopy images of few-layer phosphorus capped by graphene and hexagonal boron nitride monolayers journal March 2015
Optimizing the superconducting transition temperature and upper critical field of Sn 1 x In x Te journal July 2013
Exchange functional that tests the robustness of the plasmon description of the van der Waals density functional journal January 2014
Voltage-dependent scanning-tunneling microscopy of a crystal surface: Graphite journal February 1985
Photostrictive Two-Dimensional Materials in the Monochalcogenide Family journal May 2017
Observation of surface states on heavily indium doped SnTe(111), a superconducting topological crystalline insulator text January 2015
Valley physics in tin (II) sulfide journal January 2016
Experimental realization of a topological crystalline insulator in SnTe text January 2012
Microscopic origin of the p -type conductivity of the topological crystalline insulator SnTe and the effect of Pb alloying journal January 2014
Ferroelectricity in Covalently functionalized Two-dimensional Materials: Integration of High-mobility Semiconductors and Nonvolatile Memory journal October 2016
High-Pressure Phase Transition in Tin Telluride journal February 1964
Structural Phase Transition and Material Properties of Few-Layer Monochalcogenides journal December 2016
Ferroelectricity and Phase Transitions in Monolayer Group-IV Monochalcogenides journal August 2016
The continuous rhombohedral-gubic transformation in GeTe-SnTe alloys journal May 1963
Quasiparticle scattering from topological crystalline insulator SnTe (001) surface states journal June 2014
Observation of a topological crystalline insulator phase and topological phase transition in Pb1−xSnxTe text January 2012
Two-dimensional multiferroics in monolayer group IV monochalcogenides journal January 2017

Cited By (16)

SYNTHESIS OF IODINE DOPED n-BMA THIN FILMS VIA PLASMA POLYMERIZATION TECHNIQUE: EFFECT ON OPTICAL PROPERTIES journal June 2019
Control of C 3 N 4 and C 4 N 3 carbon nitride nanosheets’ electronic and magnetic properties through embedded atoms journal January 2020
In-plane anisotropic electronics based on low-symmetry 2D materials: progress and prospects journal January 2020
Strain-tunable electronic and optical properties of novel anisotropic green phosphorene: a first-principles study journal May 2019
From atomic layer to the bulk: low-temperature atomistic structure, ferroelectric and electronic properties of SnTe films text January 2019
Strain engineering to facilitate the occurrence of 2D ferroelectricity in CuInP 2 S 6 monolayer journal September 2019
Topological band crossings in epitaxial strained SnTe text January 2019
Band engineering and hybridization of competing arsenene allotropes: a computational study journal January 2019
Niobium oxide dihalides NbOX 2 : a new family of two-dimensional van der Waals layered materials with intrinsic ferroelectricity and antiferroelectricity journal January 2019
The growth and phase distribution of ultrathin SnTe on graphene journal April 2019
Giant spin Hall effect in two-dimensional monochalcogenides journal February 2019
Topological band crossings in epitaxial strained SnTe journal October 2019
Chalcogenides by Design: Functionality through Metavalent Bonding and Confinement text January 2020
Modulating the electronic structures of blue phosphorene towards spintronics journal January 2019
Giant spin Hall Effect in two-dimensional monochalcogenides text January 2018
Chalcogenides by Design: Functionality through Metavalent Bonding and Confinement journal April 2020