Enhanced Ferromagnetism in Monolayer Cr2Te3 via Topological Insulator Coupling
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2023
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866909625270403072 |
|---|---|
| author | Ou, Yunbo Mirzhalilov, Murod Nemes, Norbert M. Martinez, Jose L. Rocci, Mirko Duong, Alexander Akey, Austin Foucher, Alexandre C. Ge, Wenbo Suri, Dhavala Wang, Yiping Ambaye, Haile Keum, Jong Randeria, Mohit Trivedi, Nandini Burch, Kenneth S. Bell, David C. Ross, Frances M. Wu, Weida Heiman, Don Lauter, Valeria Moodera, Jagadeesh S. Chi, Hang |
| author_facet | Ou, Yunbo Mirzhalilov, Murod Nemes, Norbert M. Martinez, Jose L. Rocci, Mirko Duong, Alexander Akey, Austin Foucher, Alexandre C. Ge, Wenbo Suri, Dhavala Wang, Yiping Ambaye, Haile Keum, Jong Randeria, Mohit Trivedi, Nandini Burch, Kenneth S. Bell, David C. Ross, Frances M. Wu, Weida Heiman, Don Lauter, Valeria Moodera, Jagadeesh S. Chi, Hang |
| contents | Exchange-coupled interfaces are pivotal in exploiting two-dimensional (2D) ferromagnetism. Due to the extraordinary correlations among charge, spin, orbital and lattice degrees of freedom, layered magnetic transition metal chalcogenides (TMCs) bode well for exotic topological phenomena. Here we report the realization of wafer-scale Cr2Te3 down to monolayer (ML) on insulating SrTiO3(111) and/or Al2O3(001) substrates using molecular beam epitaxy. Robust ferromagnetism persists in the 2D limit. In particular, the Curie temperature TC of 2 ML Cr2Te3 increases from 100 K to ~ 120 K when proximitized to topological insulator (TI) (Bi,Sb)2Te3, with substantially boosted magnetization as observed via polarized neutron reflectometry. Our experiments and theory strongly indicate that the Bloembergen-Rowland interaction is likely universal underlying TC enhancement in TI-coupled magnetic heterostructures. The topological-surface-enhanced magnetism in 2D TMC enables further exchange coupling physics and quantum hybrid studies, including paving the way to realize interface-modulated topological electronics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_15028 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Enhanced Ferromagnetism in Monolayer Cr2Te3 via Topological Insulator Coupling Ou, Yunbo Mirzhalilov, Murod Nemes, Norbert M. Martinez, Jose L. Rocci, Mirko Duong, Alexander Akey, Austin Foucher, Alexandre C. Ge, Wenbo Suri, Dhavala Wang, Yiping Ambaye, Haile Keum, Jong Randeria, Mohit Trivedi, Nandini Burch, Kenneth S. Bell, David C. Ross, Frances M. Wu, Weida Heiman, Don Lauter, Valeria Moodera, Jagadeesh S. Chi, Hang Materials Science Mesoscale and Nanoscale Physics Exchange-coupled interfaces are pivotal in exploiting two-dimensional (2D) ferromagnetism. Due to the extraordinary correlations among charge, spin, orbital and lattice degrees of freedom, layered magnetic transition metal chalcogenides (TMCs) bode well for exotic topological phenomena. Here we report the realization of wafer-scale Cr2Te3 down to monolayer (ML) on insulating SrTiO3(111) and/or Al2O3(001) substrates using molecular beam epitaxy. Robust ferromagnetism persists in the 2D limit. In particular, the Curie temperature TC of 2 ML Cr2Te3 increases from 100 K to ~ 120 K when proximitized to topological insulator (TI) (Bi,Sb)2Te3, with substantially boosted magnetization as observed via polarized neutron reflectometry. Our experiments and theory strongly indicate that the Bloembergen-Rowland interaction is likely universal underlying TC enhancement in TI-coupled magnetic heterostructures. The topological-surface-enhanced magnetism in 2D TMC enables further exchange coupling physics and quantum hybrid studies, including paving the way to realize interface-modulated topological electronics. |
| title | Enhanced Ferromagnetism in Monolayer Cr2Te3 via Topological Insulator Coupling |
| topic | Materials Science Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2312.15028 |