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Title: Pseudospin Electronics in Phosphorene Nanoribbons

Journal Article · · Physical Review Applied
 [1];  [1]
  1. Univ. of Wisconsin-Madison, Madison, WI (United States)

Zigzag phosphorene nanoribbons are metallic owing to the edge states, whose energies are inside the gap and far from the bulk bands. We show that -- through electrical manipulation of edge states -- electron propagation can be restricted to one of the ribbon edges or, in case of bilayer phosphorene nanoribbons, to one of the layers. This finding implies that edge and layer can be regarded as tunable equivalents of the spin-one-half degree of freedom, i.e., the pseudospin. In both layer- and edge-pseudospin schemes, we propose and characterize a pseudospin field-effect transistor, which can generate pseudospin-polarized current. Also, we propose edge- and layer-pseudospin valves that operate analogously to conventional spin valves. The performance of valves in each pseudospin scheme is benchmarked by the pseudomagnetoresistance (PMR) ratio. The edge-pseudospin valve shows a nearly perfect PMR, with remarkable robustness against device parameters and disorder. Furthermore, these results may initiate new developments in pseudospin electronics.

Research Organization:
Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE
Grant/Contract Number:
SC0008712
OSTI ID:
1434273
Alternate ID(s):
OSTI ID: 1414046
Journal Information:
Physical Review Applied, Vol. 8, Issue 6; ISSN 2331-7019
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 17 works
Citation information provided by
Web of Science

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Cited By (6)

Strain engineering of the lattice vibration modes in monolayer black phosphorus journal November 2019
Black phosphorus as a bipolar pseudospin semiconductor journal February 2020
Photogalvanic effect induced fully spin polarized current and pure spin current in zigzag SiC nanoribbons journal January 2018
Strain-induced modulation of exchange interaction in monolayer zigzag nanoribbons of B 2 S journal September 2019
Crystallographic Characterization of Black Phosphorene and its Application in Nanostructures journal December 2019
Topologically protected wave packets and quantum rings in silicene journal August 2019

Figures / Tables (10)


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