Measuring graphene’s Berry phase at $B=0$ T
The Berry phase of wave functions is a key quantity to understand various low-energy properties of matter, among which electric polarisation, orbital magnetism, as well as topological and ultra-relativistic phenomena. Standard approaches to probe the Berry phase in solids rely on the electron dynami...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Académie des sciences
2021-09-01
|
| Series: | Comptes Rendus. Physique |
| Subjects: | |
| Online Access: | https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.79/ |
| _version_ | 1797651401042558976 |
|---|---|
| author | Dutreix, Clément González-Herrero, Hector Brihuega, Ivan Katsnelson, Mikhail I. Chapelier, Claude Renard, Vincent T. |
| author_facet | Dutreix, Clément González-Herrero, Hector Brihuega, Ivan Katsnelson, Mikhail I. Chapelier, Claude Renard, Vincent T. |
| author_sort | Dutreix, Clément |
| collection | DOAJ |
| description | The Berry phase of wave functions is a key quantity to understand various low-energy properties of matter, among which electric polarisation, orbital magnetism, as well as topological and ultra-relativistic phenomena. Standard approaches to probe the Berry phase in solids rely on the electron dynamics in response to electromagnetic forces. In graphene, probing the Berry phase $\pi $ of the massless relativistic electrons requires an external magnetic field. Here, we show that the Berry phase also affects the static response of the electrons to a single atomic scatterer, through wavefront dislocations in the surrounding standing-wave interference. This provides a new experimental method to measure the graphene Berry phase in the absence of any magnetic field and demonstrates that local disorder can be exploited as probe of topological quantum matter in scanning tunnelling microscopy experiments. |
| first_indexed | 2024-03-11T16:15:24Z |
| format | Article |
| id | doaj.art-a98699ad691c491c837a896811fdf50b |
| institution | Directory Open Access Journal |
| issn | 1878-1535 |
| language | English |
| last_indexed | 2024-03-11T16:15:24Z |
| publishDate | 2021-09-01 |
| publisher | Académie des sciences |
| record_format | Article |
| series | Comptes Rendus. Physique |
| spelling | doaj.art-a98699ad691c491c837a896811fdf50b2023-10-24T14:21:56ZengAcadémie des sciencesComptes Rendus. Physique1878-15352021-09-0122S413314310.5802/crphys.7910.5802/crphys.79Measuring graphene’s Berry phase at $B=0$ TDutreix, Clément0https://orcid.org/0000-0002-7557-7838González-Herrero, Hector1https://orcid.org/0000-0002-3028-9875Brihuega, Ivan2https://orcid.org/0000-0001-5032-9304Katsnelson, Mikhail I.3https://orcid.org/0000-0001-5165-7553Chapelier, Claude4Renard, Vincent T.5https://orcid.org/0000-0001-6242-9468Université de Bordeaux, France and CNRS, LOMA, UMR 5798, Talence, F-33400, FranceDepartamento de Física de la Materia Condensada, Universidad Autónoma de Madrid, E-28049 Madrid, Spain; Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, E-28049 Madrid, SpainDepartamento de Física de la Materia Condensada, Universidad Autónoma de Madrid, E-28049 Madrid, Spain; Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, E-28049 Madrid, Spain; Instituto Nicolás Cabrera, Universidad Autónoma de Madrid, E-28049 Madrid, SpainRadboud University, Institute for Molecules and Materials, Nijmegen, The NetherlandsUniv. Grenoble Alpes, CEA, Grenoble INP, IRIG, PHELIQS, F-38000 Grenoble, FranceUniv. Grenoble Alpes, CEA, Grenoble INP, IRIG, PHELIQS, F-38000 Grenoble, FranceThe Berry phase of wave functions is a key quantity to understand various low-energy properties of matter, among which electric polarisation, orbital magnetism, as well as topological and ultra-relativistic phenomena. Standard approaches to probe the Berry phase in solids rely on the electron dynamics in response to electromagnetic forces. In graphene, probing the Berry phase $\pi $ of the massless relativistic electrons requires an external magnetic field. Here, we show that the Berry phase also affects the static response of the electrons to a single atomic scatterer, through wavefront dislocations in the surrounding standing-wave interference. This provides a new experimental method to measure the graphene Berry phase in the absence of any magnetic field and demonstrates that local disorder can be exploited as probe of topological quantum matter in scanning tunnelling microscopy experiments.https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.79/Berry phaseGrapheneSTMWavefront dislocationsTopologyAtomic defect |
| spellingShingle | Dutreix, Clément González-Herrero, Hector Brihuega, Ivan Katsnelson, Mikhail I. Chapelier, Claude Renard, Vincent T. Measuring graphene’s Berry phase at $B=0$ T Comptes Rendus. Physique Berry phase Graphene STM Wavefront dislocations Topology Atomic defect |
| title | Measuring graphene’s Berry phase at $B=0$ T |
| title_full | Measuring graphene’s Berry phase at $B=0$ T |
| title_fullStr | Measuring graphene’s Berry phase at $B=0$ T |
| title_full_unstemmed | Measuring graphene’s Berry phase at $B=0$ T |
| title_short | Measuring graphene’s Berry phase at $B=0$ T |
| title_sort | measuring graphene s berry phase at b 0 t |
| topic | Berry phase Graphene STM Wavefront dislocations Topology Atomic defect |
| url | https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.79/ |
| work_keys_str_mv | AT dutreixclement measuringgraphenesberryphaseatb0t AT gonzalezherrerohector measuringgraphenesberryphaseatb0t AT brihuegaivan measuringgraphenesberryphaseatb0t AT katsnelsonmikhaili measuringgraphenesberryphaseatb0t AT chapelierclaude measuringgraphenesberryphaseatb0t AT renardvincentt measuringgraphenesberryphaseatb0t |