Engineering Topological Superlattices and Phase Diagrams

Shibayev, Pavel P.; König, Elio J.; Salehi, Maryam; Moon, Jisoo; Han, Myung-Geun; Oh, Seongshik

doi:10.1021/acs.nanolett.8b03751

Title: Engineering Topological Superlattices and Phase Diagrams

Journal Article · 20 January 2019 · Nano Letters

DOI: https://doi.org/10.1021/acs.nanolett.8b03751 · OSTI ID:1504373

^[1]; König, Elio J. ^[1]; Salehi, Maryam ^[2];

^[1]; Han, Myung-Geun ^[3];

^[1]

Rutgers Univ., Piscataway, NJ (United States). Dept. of Physics and Astronomy
Rutgers Univ., Piscataway, NJ (United States). Dept. of of Materials Science and Engineering
Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)

The search for new topological materials and states of matter is presently at the forefront of quantum materials research. One powerful approach to novel topological phases beyond the thermodynamic space is to combine different topological/functional materials into a single materials platform in the form of superlattices. However, despite some previous efforts there has been a significant gap between theories and experiments in this direction. Here in this paper, we provide the first detailed set of experimentally verifiable phase diagrams of topological superlattices composed of archetypal topological insulator, Bi₂Se₃, and normal insulator, In₂Se₃, by combining molecular-level materials control, low-temperature magnetotransport measurements, and field theoretical calculations. We show how the electronic properties of topological superlattices evolve with unit-layer thicknesses and utilize the weak antilocalization effect as a tool to gain quantitative insights into the evolution of conducting channels within each set of heterostructures. This orchestrated study opens the door to the possibility of creating a variety of artificial-topological-phases by combining topological materials with various other functional building blocks such as superconductors and magnetic materials.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: SC0012704

OSTI ID:: 1504373

Report Number(s):: BNL--211488-2019-JAAM

Journal Information:: Nano Letters, Journal Name: Nano Letters Journal Issue: 2 Vol. 19; ISSN 1530-6984

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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The dimensional crossover of quantum transport properties in few-layered Bi ₂ Se ₃ thin films Yang, Liang; Wang, Zhenhua; Li, Mingze Nanoscale Advances, Vol. 1, Issue 6 https://doi.org/10.1039/c9na00036d	journal	January 2019

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75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
Superlattices
phase diagrams
topological insulators
weak antilocalization

Title: Engineering Topological Superlattices and Phase Diagrams

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