ESR study of p-type natural 2H-polytype MoS2 crystals: The As acceptor activity | Zendy

A. Stesmans | Zendy; Serena Iacovo | Zendy; V. V. Afanas’ev | Zendy

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ESR study of p-type natural 2H-polytype MoS2 crystals: The As acceptor activity

Author(s) -

A. Stesmans,

Serena Iacovo,

V. V. Afanas’ev

Publication year - 2016

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4965841

Subject(s) - zeeman effect , dopant , doping , electron paramagnetic resonance , acceptor , condensed matter physics , materials science , zeeman energy , spin (aerodynamics) , crystallography , agglomerate , chemistry , nuclear magnetic resonance , magnetic field , optoelectronics , physics , quantum mechanics , composite material , thermodynamics

Low-temperature (T = 1.7-77 K) multi frequency electron spin resonance (ESR) study on p-type 2H-polytype geological MoS2 crystals reveals p-type doping predominantly originating from As atoms substituting for S sites in densities of (2.4 +/- 0.2) x 10(17) cm(-3). Observation of a "half field" (g similar to 3.88) signal firmly correlating with the central Zeeman As accepter signal indicates the presence of spin S > 1/2 As agglomerates, which together with the distinct multicomponent makeup of the Zeeman signal points to manifest non-uniform As doping; only similar to 13% of the total As response originates from individual decoupled As dopants. From ESR monitoring the latter vs. T, an activation energy E-a = (0.7 +/- 0.2) meV is obtained. This unveils As as a noticeable shallow acceptor dopant, appropriate for realization of effective p-type doping in targeted 2D MoS2-based switching devices.status: publishe

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