Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Manipulation of spin transport in graphene/transition metal dichalcogenide heterobilayers upon twisting

Full text
Author(s):
Pezo, Armando [1, 2, 3] ; Zanolli, Zeila [2, 3, 4, 5] ; Wittemeier, Nils [2, 3] ; Ordejon, Pablo [2, 3] ; Fazzio, Adalberto [1, 6] ; Roche, Stephan [7, 2, 3] ; Garcia, Jose H. [2, 3]
Total Authors: 7
Affiliation:
[1] Fed Univ ABC, Ctr Nat & Human Sci, BR-09210580 Santo Andre, SP - Brazil
[2] CSIC, Catalan Inst Nanosci & Nanotechnol ICN2, Campus UAB, Bellaterra 08193, Catalonia - Spain
[3] Barcelona Inst Sci & Technol, Campus UAB, Bellaterra 08193, Catalonia - Spain
[4] Univ Utrecht, Dept Chem, Debye Inst Nanomat Sci, Utrecht - Netherlands
[5] Univ Utrecht, ETSF, Utrecht - Netherlands
[6] Brazilian Nanotechnol Natl Lab CNPEM, BR-13083970 Campinas, SP - Brazil
[7] Inst Catalana Recerca & Estudis Avancats ICREA, Barcelona 08010 - Spain
Total Affiliations: 7
Document type: Journal article
Source: 2D MATERIALS; v. 9, n. 1 JAN 2022.
Web of Science Citations: 0
Abstract

Proximity effects between layered materials trigger a plethora of novel and exotic quantum transport phenomena. Besides, the capability to modulate the nature and strength of proximity effects by changing crystalline and interfacial symmetries offers a vast playground to optimize physical properties of relevance for innovative applications. In this work, we use large-scale first principles calculations to demonstrate that strain and twist-angle strongly vary the spin-orbit coupling (SOC) in graphene/transition metal dichalcogenide heterobilayers. Such a change results in a modulation of the spin relaxation times by up to two orders of magnitude. Additionally, the relative strengths of valley-Zeeman and Rashba SOC can be tailored upon twisting, which can turn the system into an ideal Dirac-Rashba regime or generate transitions between topological states of matter. These results shed new light on the debated variability of SOC and clarify how lattice deformations can be used as a knob to control spin transport. Our outcomes also suggest complex spin transport in polycrystalline materials, due to the random variation of grain orientation, which could reflect in large spatial fluctuations of SOC fields. (AU)

FAPESP's process: 16/14011-2 - Electronic properties: interfaces between topological insulators (TI-TI)
Grantee:Marcio Jorge Teles da Costa
Support Opportunities: Scholarships in Brazil - Post-Doctoral