Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session G29: Strongly Correlated Systems, Including Quantum Fluids and Solids V
11:30 AM–2:30 PM,
Tuesday, March 7, 2023
Room: Room 221
Sponsoring
Unit:
DCMP
Chair: Sanu Mishra, Los alamos National Lab
Abstract: G29.00001 : Constructing heavy fermions in a NbSe2 heterostructure*
11:30 AM–11:42 AM
Author not Attending
Presenter:
Xin Huang
(Aalto University)
Authors:
Xin Huang
(Aalto University)
Ganguli C Somesh
(Aalto University)
Jani Sainio
(Aalto University)
Jose Lado
(Aalto University)
Peter Liljeroth
(Aalto University)
Here, we push the concept into lighter compounds without any period 6 elements but only atoms having d-electrons, namely NbSe2. We construct two-dimentional (2D) heavy fermion system in a simple recipeāin a NbSe2 heterostructure by coupling the itinerant conduction electrons in 1H-NbSe2 with the localized moments formed by the charge density wave (CDW) in 1T-NbSe2. We use low-temperature scanning tunneling microscopy (STM) and spectroscopy (STS) to probe local density of states (LDOS) of the differently stacked heterostructures. This allows us to detect the signatures of heavy fermion physics, namely, the Kondo effect when probing the LDOS of the 1T-side and heavy fermion hybridization gap on the 1H-NbSe2 side of the heterostructure. This 2D system is an exciting playground for exploring heavy fermion phase diagram compared to bulk compounds, since itinerant electrons and localized magnetic moments are de-coupled into separate two component monolayers and can be engineered separately. This viable alternative artificial system is expected to provide new insights into open questions on heavy fermions.
*This research was supported by the European Research Council (ERC-2017-AdG no. 788185) and Academy of Finland (Academy professor funding no. 318995)
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