Reversal of quantized Hall drifts at noninteracting and interacting topological boundaries.
Science
; 384(6693): 317-320, 2024 Apr 19.
Article
em En
| MEDLINE
| ID: mdl-38635716
ABSTRACT
The transport properties of gapless edge modes at boundaries between topologically distinct domains are of fundamental and technological importance. We experimentally studied long-distance quantized Hall drifts in a harmonically confined topological pump of ultracold fermionic atoms. We found that quantized drifts halt and reverse their direction when the atoms reach a critical slope of the confining potential, revealing the presence of a topological boundary. The drift reversal corresponded to a band transfer between a band with Chern number C = +1 and another with C = -1 through a gapless edge mode, in agreement with the bulk-edge correspondence for noninteracting particles. Nonzero repulsive Hubbard interactions led to the emergence of an additional edge in the system through a mechanism in which pairs of fermions are split.
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1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Sci. (N.Y., N.Y.)
/
Science
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
Suíça