Journal
PHYSICAL REVIEW B
Volume 106, Issue 24, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.106.L241401
Keywords
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Funding
- U.S. DOE, Office of Basic Energy Sciences [DE-SC0016380]
- NSF DMR [1904076]
- National Natural Science Foundation of China [1904076]
- Singapore NRF [CRP22-2019-0061]
- National Science Foundation Major Research Instrumentation [1828141]
- UD-CHARM, a National Science Foundation MRSEC [DMR-2011824]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1904076] Funding Source: National Science Foundation
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In addition to the topologically protected linear dispersion, a tunable Rashba spin-splitting two-dimensional electron gas was found on the surface of topological insulators. Large bilinear magnetoresistance was observed in Bi2Se3 films decorated with transition-metal atoms, and this effect can be fine tuned through surface atom deposition for potential spintronic applications.
In addition to the topologically protected linear dispersion, a band-bending-confined two-dimensional electron gas with tunable Rashba spin-splitting (RSS) was found to coexist with the topological surface states on the surface of topological insulators (TIs). Here, we report the observation of large bilinear magnetoresistance (BMR) in Bi2Se3 films decorated with transition-metal atoms. The magnitude of the BMR sensitively depends on the type and amount of atoms deposited, with a maximum achieved value close to those of strong Rashba semiconductors. Our first-principles calculations reproduce the quantum well states and reveal sizable RSS in all Bi2Se3 heterostructures with broken inversion symmetry. Our results show that charge-spin interconversion through RSS states in TIs can be fine tuned through surface atom deposition and easily detected via BMR for potential spintronic applications.
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