Regensburg 2025 – scientific programme
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O: Fachverband Oberflächenphysik
O 51: Poster Electronic Structure of Surfaces: Spectroscopy, Surface States
O 51.1: Poster
Tuesday, March 18, 2025, 18:00–20:00, P2
Visualizing quantum states in fluorene-based organometallic quantum corrals — •Longfeng Huang1, Wenchao Zhao1, Ignacio Piquero-Zulaica1, Johannes Barth1, and Biao Yang1, 2 — 1Physics Department E20, Technical University of Munich, 85748 Garching, Germany — 2Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, 215123 Suzhou, China
Constructing well-defined and controllable quantum states holds promise for applications in quantum technology. As an exemplary quantum architecture, quantum corrals (QCs) which are considered as artificial atoms attract enormous attention.1, 2 Common strategies for manufacturing QCs have mainly involved atomic and molecular manipulations, molecular assembly, and on-surface synthesis.3-5 However, fabricating robust QCs simultaneously with a high yield and specific size still remains elusive. In this work, we realize stable QCs with a well-defined size via organometallic bonding between fluorine-based molecules and intrinsic Ag adatoms on Ag(111). In particular, we observe spatial quantum resonance states inside the QCs, which arise from the scattered two-dimensional electron gas. Additionally, stadium-shaped and triangular QCs exhibit intriguingly specific orbital-like quantum states in differential conductance maps. In addition, we tune the QCs by replacing the F to H atoms and tip manipulation. Our study provides new means to fabricate controllable exotic quantum states with atomically precise QCs, aiding in a rational design strategy towards materials with tailored electronic properties.
Keywords: quantum corral; confinement states; on surface synthesis; organometallic; STM