Semi-Epitaxial SmB6 Thin Films Prepared by the Molecular Beam Epitaxy

Shishido, Hiroaki; Yoneda, Yutaka; Yoshida, Takuya; Noguchi, S.; Ishida, Toshimasa

doi:10.1016/j.phpro.2015.12.049

Cited by 9 publications

(5 citation statements)

References 26 publications

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“…We note that thin films of SmB 6 have already been grown via molecular beam epitaxy (MBE) 107 and Kondo superlattices of other compounds have been grown via MBE for study of quantum criticality 108 . Furthermore, evaporation of boron and most rare-earth lanthanides is possible at operating temperatures for effusion cells 109 .…”

Section: Discussionmentioning

confidence: 99%

Magnetic Weyl and Dirac Kondo semimetal phases in heterostructures

Ok,

Legner,

Neupert

et al. 2017

Preprint

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We study a layered three-dimensional heterostructure in which two types of Kondo insulators are stacked alternatingly. One of them is the topological Kondo insulator SmB6, the other one an isostructural Kondo insulator AB6, where A is a rare-earth element, e.g., Eu, Yb, or Ce. We find that if the latter orders ferromagnetically, the heterostructure generically becomes a magnetic Weyl Kondo semimetal, while antiferromagnetic order can yield a magnetic Dirac Kondo semimetal. We detail both scenarios with general symmetry considerations as well as concrete tight-binding calculations and show that type-I as well as type-II magnetic Weyl/Dirac Kondo semimetal phases are possible in these heterostructures. Our results demonstrate that Kondo insulator heterostructures are a versatile platform for design of strongly correlated topological semimetals.

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Section: Discussionmentioning

confidence: 99%

Magnetic Weyl and Dirac Kondo semimetal phases in heterostructures

Ok,

Legner,

Neupert

et al. 2017

Preprint

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“…PLD is another PVD technique, where high power laser light is used to vaporise material from the top surface of a stoichiometric target within a very short period of time, which then gets deposited on a substrate. Due [74] Sapphire dc MS Polycrystalline UPd 2 Al 3 [75] Al 2 O 3 (random, a-plane, r-plane), LaAlO * 3 (111) MBE (0001) oriented CeNi 2 Ge 2 [76] W( 110) MBE (001) oriented CeCu 6 [77] S i 3 N 4 (b)/Si(100) dc MS Polycrystalline UNi 2 Al 3 [78] Y A l O 3 (010), YAlO 3 (112) MBE (001) oriented with impurity phase CeCoIn 5 [79] A l 2 O 3 (a-plane, r-plane) MBE (001) oriented with impurity phase CeCoIn 5 [80] Cr(001) (b)/MgO(001) MBE (001) oriented CeCoIn 5 [81] A l 2 O 3 (r-plane), Cr(001)(b)/MgO(001) dc MS + thermal evaporation (001) oriented CeCoIn 5 [82] C e I n 3 (b)/MgF 2 (001) MBE Epitaxial CeCoIn 5 [83] A l 2 O 3 (0001) PLD Polycrystalline CeIn 3 [84] M g F 2 MBE Epitaxial CeRhIn 5 [85] C e I n 3 (b)/MgF 2 (001) MBE Epitaxial CeCu 2 Ge 2 [86] MgO(001) MBE Epitaxial CeFe 2 Ge 2 [86] MgO(001) MBE Epitaxial SmB 6 [87] Si(001) dc MS Polycrystalline SmB 6 [88] MgO(001) PLD Polycrystalline SmB 6 [89] MgO(001) MBE (001) oriented YbAl 3 [90] L u A l 3 (b)/Al(b)/MgO(001) MBE Epitaxial SmO [91] Y A l O 3 (110) MBE Epitaxial YbRh 2 Si 2 [92] Ge(001) MBE Epitaxial Ce [93] Graphene on 6H-SiC (0001) MBE Epitaxial a (b) indicates buffer layer, * indicates the substrate for which the best quality thin film was obtained.…”

Section: Pulsed Laser Depositionmentioning

confidence: 99%

Heavy fermion thin films: progress and prospects

Chatterjee

2021

Electron. Struct.

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Heavy fermion compounds are a remarkable class of inter-metallic systems, where the presence of several competing interactions leads to the emergence of a plethora of exotic properties. Although these compounds have been extensively studied in the last few decades, their epitaxial synthesis in a thin film form has remained poorly explored. The ability to create these materials in a bottoms-up manner opens up the possibility of both controlling and engineering their properties at the atomic scale, and allows fabrication of artificial heterostructures and superlattices that have no bulk analogues. Furthermore, experimental probes, which are compatible with a thin film geometry but are difficult to make use of with bulk single crystals, can be utilized to gain new insights into their electronic structure. Motivated by the recent advances in thin film technology, this review aims to explore the challenges in thin film growth of heavy fermion systems, presents an overview of the recent progress, and outlines unique opportunities that exist, which are of fundamental scientific importance and could be harnessed for potential technological applications.

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“…A similar approach was used in 2017 by Petrushevsky et al [88]. Growth attempts using pulsed laser deposition, molecular beam epitaxy or sputtering using a single target often result in thin films with substantial boron deficiency [87,89,90]. Batkova et al, however, have recently reported the preparation of stoichiometric SmB 6 thin films via pulsed laser deposition [91].…”

Section: Thin Films and Nanowiresmentioning

confidence: 99%

Bulk and surface properties of SmB6

Rosa¹,

Fisk²

2020

Preprint

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Samarium hexaboride crystallizes in a simple cubic structure (space group #221, Pm3m), but its properties are far from being straightforward. Initially classified as a Kondo insulator born out of its intriguing intermediate valence ground state, SmB 6 has been recently predicted to be a strongly correlated topological insulator. The subsequent experimental discovery of surface states has revived the interest in SmB 6 , and our purpose here is to review the extensive and in many aspects perplexing experimental record of this material. We will discuss both surface and bulk properties of SmB 6 with an emphasis on the role of crystal growth and sample preparation. We will also highlight the remaining mysteries and open questions in the field.Rare-Earth Borides Dmytro S. Inosov (ed.

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Semi-Epitaxial SmB6 Thin Films Prepared by the Molecular Beam Epitaxy

Cited by 9 publications

References 26 publications

Magnetic Weyl and Dirac Kondo semimetal phases in heterostructures

Magnetic Weyl and Dirac Kondo semimetal phases in heterostructures

Heavy fermion thin films: progress and prospects

Bulk and surface properties of SmB6

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