File Download
Links for fulltext
(May Require Subscription)
- Publisher Website: 10.1093/nsr/nwz117
- Scopus: eid_2-s2.0-85082537434
- WOS: WOS:000519816200007
- Find via
Supplementary
- Citations:
- Appears in Collections:
Article: Giant magnetic field from moiré induced Berry phase in homobilayer semiconductors
Title | Giant magnetic field from moiré induced Berry phase in homobilayer semiconductors |
---|---|
Authors | |
Keywords | two-dimensional materials transition metal dichalcogenides moiré pattern Berry phase quantum Hall effect |
Issue Date | 2020 |
Publisher | Oxford University Press (OUP): Policy C. The Journal's web site is located at http://nsr.oxfordjournals.org/ |
Citation | National Science Review, 2020, v. 7 n. 1, p. 12-20 How to Cite? |
Abstract | When quasiparticles move in condensed matters, the texture of their internal quantum structure as a function of position and momentum can give rise to Berry phases that have profound effects on the material’s properties. Seminal examples include the anomalous Hall and spin Hall effects from the momentum-space Berry phases in homogeneous crystals. Here, we explore a conjugate form of the electron Berry phase arising from the moiré pattern: the texture of atomic configurations in real space. In homobilayer transition metal dichalcogenides, we show that the real-space Berry phase from moiré patterns manifests as a periodic magnetic field with magnitudes of up to hundreds of Tesla. This quantity distinguishes moiré patterns from different origins, which can have an identical potential landscape, but opposite quantized magnetic flux per supercell. For low-energy carriers, the homobilayer moirés realize topological flux lattices for the quantum-spin Hall effect. An interlayer bias can continuously tune the spatial profile of the moiré magnetic field, whereas the flux per supercell is a topological quantity that can only have a quantized jump observable at a moderate bias. We also reveal the important role of the non-Abelian Berry phase in shaping the energy landscape in small moiré patterns. Our work points to new possibilities to access ultra-high magnetic fields that can be tailored to the nanoscale by electrical and mechanical controls. |
Persistent Identifier | http://hdl.handle.net/10722/286281 |
ISSN | 2023 Impact Factor: 16.3 2023 SCImago Journal Rankings: 2.934 |
ISI Accession Number ID |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Yu, H | - |
dc.contributor.author | Chen, M | - |
dc.contributor.author | Yao, W | - |
dc.date.accessioned | 2020-08-31T07:01:43Z | - |
dc.date.available | 2020-08-31T07:01:43Z | - |
dc.date.issued | 2020 | - |
dc.identifier.citation | National Science Review, 2020, v. 7 n. 1, p. 12-20 | - |
dc.identifier.issn | 2095-5138 | - |
dc.identifier.uri | http://hdl.handle.net/10722/286281 | - |
dc.description.abstract | When quasiparticles move in condensed matters, the texture of their internal quantum structure as a function of position and momentum can give rise to Berry phases that have profound effects on the material’s properties. Seminal examples include the anomalous Hall and spin Hall effects from the momentum-space Berry phases in homogeneous crystals. Here, we explore a conjugate form of the electron Berry phase arising from the moiré pattern: the texture of atomic configurations in real space. In homobilayer transition metal dichalcogenides, we show that the real-space Berry phase from moiré patterns manifests as a periodic magnetic field with magnitudes of up to hundreds of Tesla. This quantity distinguishes moiré patterns from different origins, which can have an identical potential landscape, but opposite quantized magnetic flux per supercell. For low-energy carriers, the homobilayer moirés realize topological flux lattices for the quantum-spin Hall effect. An interlayer bias can continuously tune the spatial profile of the moiré magnetic field, whereas the flux per supercell is a topological quantity that can only have a quantized jump observable at a moderate bias. We also reveal the important role of the non-Abelian Berry phase in shaping the energy landscape in small moiré patterns. Our work points to new possibilities to access ultra-high magnetic fields that can be tailored to the nanoscale by electrical and mechanical controls. | - |
dc.language | eng | - |
dc.publisher | Oxford University Press (OUP): Policy C. The Journal's web site is located at http://nsr.oxfordjournals.org/ | - |
dc.relation.ispartof | National Science Review | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.subject | two-dimensional materials | - |
dc.subject | transition metal dichalcogenides | - |
dc.subject | moiré pattern | - |
dc.subject | Berry phase | - |
dc.subject | quantum Hall effect | - |
dc.title | Giant magnetic field from moiré induced Berry phase in homobilayer semiconductors | - |
dc.type | Article | - |
dc.identifier.email | Yao, W: wangyao@hku.hk | - |
dc.identifier.authority | Yu, H=rp02112 | - |
dc.identifier.authority | Yao, W=rp00827 | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1093/nsr/nwz117 | - |
dc.identifier.scopus | eid_2-s2.0-85082537434 | - |
dc.identifier.hkuros | 313285 | - |
dc.identifier.volume | 7 | - |
dc.identifier.issue | 1 | - |
dc.identifier.spage | 12 | - |
dc.identifier.epage | 20 | - |
dc.identifier.isi | WOS:000519816200007 | - |
dc.publisher.place | United Kingdom | - |
dc.identifier.issnl | 2053-714X | - |