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Atomic scale control and visualization of topological quantum phase transition in π-conjugated polymers driven by their length
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SYSNO ASEP 0549109 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Atomic scale control and visualization of topological quantum phase transition in π-conjugated polymers driven by their length Author(s) González-Herrero, H. (CZ)
Mendieta Moreno, Jesús Ignacio (FZU-D) ORCID
Edalatmanesh, Shayan (FZU-D) ORCID
Santos, J. (ES)
Martín, N. (ES)
Écija, D. (ES)
De La Torre Cerdeño, Bruno (FZU-D) ORCID
Jelínek, Pavel (FZU-D) RID, ORCIDNumber of authors 8 Article number 2104495 Source Title Advanced Materials. - : Wiley - ISSN 0935-9648
Roč. 33, č. 44 (2021)Number of pages 9 s. Language eng - English Country DE - Germany Keywords nc-AFM ; on surface chemistry ; polymers ; quantum phase transition ; pseudo Jahn-Teller Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) R&D Projects GX20-13692X GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support FZU-D - RVO:68378271 UT WOS 000696904400001 EID SCOPUS 85115009470 DOI 10.1002/adma.202104495 Annotation Quantum phase transitions (QPTs) driven by quantum fluctuations are transitions between distinct quantum phases of matter. At present, they are poorly understood and not readily controlled. Here, scanning tunneling microscopy (STM) and noncontact atomic force microscopy (nc-AFM) are used to explore atomic scale control over quantum phase transitions between two different topological quantum states of a well-defined π-conjugated polymer. The phase transition is driven by a pseudo Jahn–Teller effect that is activated above a certain polymer chain length. In addition, theoretical calculations indicate the presence of long-lasting coherent fluctuations between the polymer's two quantum phases near the phase transition, at finite temperature. This work thus presents a new way of exploring atomic-scale control over QPTs and indicates that emerging quantum criticality in the vicinity of a QPT can give rise to new states of organic matter. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2022 Electronic address https://doi.org/10.1002/adma.202104495
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