The thermally induced metal–semiconducting phase transition of samarium monosulfide (SmS) thin films

Rogers, E.G.; Smet, Philippe; Dorenbos, P.; Poelman, Dirk; Kolk, Erik van der

doi:10.1088/0953-8984/22/1/015005

Cited by 19 publications

(25 citation statements)

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“…The metallic state can switch back to the semiconducting state by annealing or upon release of the pressure in the case of using other rare-earths elements, such as Eu and Gd. [1] The electronic changes between the states are accompanied by changes in optical and electrical properties. By applying pressure to SmS, the 5d degenerate state moves towards the 4f state of the Sm ion.…”

Section: Introductionmentioning

confidence: 99%

Stability of switchable SmS for piezoresistive applications

Sousanis

Smet

Detavernier

et al. 2016

2016 IEEE Nanotechnology Materials and Devices Conference (NMDC)

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In this work samarium sulfide thin films have been deposited by using e-beam evaporation under H2Satmosphere. Optical and structural properties were studied in several environments. The stability in several environments allows further processing into piezoelectronic devices."(c) 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works." 1 Abstract-In this work samarium sulfide thin films have been deposited by using e-beam evaporation under H2S atmosphere. Optical and structural properties were studied in several environments. The stability in several environments allows further processing into piezoelectronic devices.

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Section: Introductionmentioning

confidence: 99%

Stability of switchable SmS for piezoresistive applications

Sousanis

Smet

Detavernier

et al. 2016

2016 IEEE Nanotechnology Materials and Devices Conference (NMDC)

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“…As we will discuss further, the moderate pressure required for switching, the possibility to modify the material to make the transition reversible, and finally the fact that the transition takes place at room temperature, all make SmS a highly interesting material from the applications point of view. From the first investigations by Suryanarayanan et al [ 14 ] to more recent work of Rogers et al [ 15 ] the optical spectra of SmS have been studied in order to gain a deeper understanding of the absorption peaks and the nature of the transition. SmS possesses a NaCl (fcc/rock salt) structure [ 13 , 15 ], which remains unaltered after transition, as seen in Figure 1 a.…”

Section: Introductionmentioning

confidence: 99%

“…From the first investigations by Suryanarayanan et al [ 14 ] to more recent work of Rogers et al [ 15 ] the optical spectra of SmS have been studied in order to gain a deeper understanding of the absorption peaks and the nature of the transition. SmS possesses a NaCl (fcc/rock salt) structure [ 13 , 15 ], which remains unaltered after transition, as seen in Figure 1 a. The isostructural transition contrasts with other phase change materials, where changes in resistivity and optical properties are caused by a change in crystallographic phase.…”

Section: Introductionmentioning

confidence: 99%

Samarium Monosulfide (SmS): Reviewing Properties and Applications

2017

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In this review, we give an overview of the properties and applications of samarium monosulfide, SmS, which has gained considerable interest as a switchable material. It shows a pressure-induced phase transition from the semiconducting to the metallic state by polishing, and it switches back to the semiconducting state by heating. The material also shows a magnetic transition, from the paramagnetic state to an antiferromagnetically ordered state. The switching behavior between the semiconducting and metallic states could be exploited in several applications, such as high density optical storage and memory materials, thermovoltaic devices, infrared sensors and more. We discuss the electronic, optical and magnetic properties of SmS, its switching behavior, as well as the thin film deposition techniques which have been used, such as e-beam evaporation and sputtering. Moreover, applications and possible ideas for future work on this material are presented. Our scope is to present the properties of SmS, which were mainly measured in bulk crystals, while at the same time we describe the possible deposition methods that will push the study of SmS to nanoscale dimensions, opening an intriguing range of applications for low-dimensional, pressure-induced semiconductor–metal transition compounds.

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“…The SmS returns to semiconducting state at lower pressure of about 0.5 kbar [1]. The Band gaps of samarium chalcogenides are 0.15 eV, 0.45eV and 0.65eV respectively at zero pressure [1][2][3][4][5]. The transition is associated with the promotion of a 4f electron in the 5d band, changing the valence from Sm 2+ to Sm …”

Section: Introductionmentioning

confidence: 99%