Tuneable topological domain wall states in engineered atomic chains

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Tuneable topological domain wall states in engineered atomic chains. / Huda, Md Nurul; Kezilebieke, Shawulienu; Ojanen, Teemu; Drost, Robert; Liljeroth, Peter.

julkaisussa: npj Quantum Materials, Vuosikerta 5, Nro 1, 17, 2020.

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Huda, Md Nurul ; Kezilebieke, Shawulienu ; Ojanen, Teemu ; Drost, Robert ; Liljeroth, Peter. / Tuneable topological domain wall states in engineered atomic chains. Julkaisussa: npj Quantum Materials. 2020 ; Vuosikerta 5, Nro 1.

Bibtex - Lataa

@article{260b87f016174752954679d2bab6c131,

title = "Tuneable topological domain wall states in engineered atomic chains",

abstract = "Topological modes in one- and two-dimensional systems have been proposed for numerous applications utilizing their exotic electronic responses. The 1D, zero-energy, topologically protected end modes can be realized in structures implementing the Su–Schrieffer–Heeger (SSH) model. While the edge modes in the SSH model are at exactly the mid-gap energy, other paradigmatic 1D models such as trimer and coupled dimer chains have non-zero energy boundary states. However, these structures have not been realized in an atomically tuneable system that would allow explicit control of the edge modes. Here, we demonstrate atomically controlled trimer and coupled dimer chains realized using chlorine vacancies in the c(2 × 2) adsorption layer on Cu(100). This system allows wide tuneability of the domain wall modes that we experimentally demonstrate using low-temperature scanning tunneling microscopy (STM).",

author = "Huda, {Md Nurul} and Shawulienu Kezilebieke and Teemu Ojanen and Robert Drost and Peter Liljeroth",

year = "2020",

doi = "10.1038/s41535-020-0219-3",

language = "English",

volume = "5",

journal = "npj Quantum Materials",

issn = "2397-4648",

publisher = "Nature Research",

number = "1",

}

RIS (suitable for import to EndNote) - Lataa

TY - JOUR

T1 - Tuneable topological domain wall states in engineered atomic chains

AU - Huda, Md Nurul

AU - Kezilebieke, Shawulienu

AU - Ojanen, Teemu

AU - Drost, Robert

AU - Liljeroth, Peter

PY - 2020

Y1 - 2020

N2 - Topological modes in one- and two-dimensional systems have been proposed for numerous applications utilizing their exotic electronic responses. The 1D, zero-energy, topologically protected end modes can be realized in structures implementing the Su–Schrieffer–Heeger (SSH) model. While the edge modes in the SSH model are at exactly the mid-gap energy, other paradigmatic 1D models such as trimer and coupled dimer chains have non-zero energy boundary states. However, these structures have not been realized in an atomically tuneable system that would allow explicit control of the edge modes. Here, we demonstrate atomically controlled trimer and coupled dimer chains realized using chlorine vacancies in the c(2 × 2) adsorption layer on Cu(100). This system allows wide tuneability of the domain wall modes that we experimentally demonstrate using low-temperature scanning tunneling microscopy (STM).

AB - Topological modes in one- and two-dimensional systems have been proposed for numerous applications utilizing their exotic electronic responses. The 1D, zero-energy, topologically protected end modes can be realized in structures implementing the Su–Schrieffer–Heeger (SSH) model. While the edge modes in the SSH model are at exactly the mid-gap energy, other paradigmatic 1D models such as trimer and coupled dimer chains have non-zero energy boundary states. However, these structures have not been realized in an atomically tuneable system that would allow explicit control of the edge modes. Here, we demonstrate atomically controlled trimer and coupled dimer chains realized using chlorine vacancies in the c(2 × 2) adsorption layer on Cu(100). This system allows wide tuneability of the domain wall modes that we experimentally demonstrate using low-temperature scanning tunneling microscopy (STM).

U2 - 10.1038/s41535-020-0219-3

DO - 10.1038/s41535-020-0219-3

M3 - Article

VL - 5

JO - npj Quantum Materials

JF - npj Quantum Materials

SN - 2397-4648

IS - 1

M1 - 17

ER -

TUTCRIS