Molecular beam epitaxy of superconducting Sn${}_{1-x}$In${}_x$Te thin films

Abstract

We report a systematic study on the growth conditions of Sn${}_{1-x}$In${}_x$Te thin films by molecular beam epitaxy for maximization of superconducting transition temperature $T_{\mathrm{c}}$. Careful tuning of the flux ratios of Sn, In, and Te enables us to find an optimum condition for substituting rich In content ($x$ = 0.66) into Sn site in a single phase of Sn${}_{1-x}$In${}_x$Te beyond the bulk solubility limit at ambient pressure ($x$ = 0.5). $T_{\mathrm{c}}$ shows a dome-shaped dependence on In content $x$ with the highest $T_{\mathrm{c}}$ = 4.20 K at $x$ = 0.55, being consistent to that reported for bulk crystals. The well-regulated Sn${}_{1-x}$In${}_x$Te films can be a useful platform to study possible topological superconductivity by integrating them into the state-of-the-art junctions and/or proximity-coupled devices.

arXiv comment20 pages, 6 figures

References in corpus (30)

• Topological Insulators
• Topological insulators and superconductors
• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
• Observation of Majorana Fermions in Ferromagnetic Atomic Chains on a Superconductor
• Topological superconductors: a review
• Topological Crystalline Insulators in the SnTe Material Class
• Experimental realization of a topological crystalline insulator in SnTe
• Evidence for Majorana bound state in an iron-based superconductor
• Observation of topological superconductivity on the surface of an iron-based superconductor
• Topological Superconductivity in CuxBi2Se3
• Observation of Majorana fermions with spin selective Andreev reflection in the vortex of topological superconductor
• Chiral Topological Superconductor From the Quantum Hall State
• Quantized Majorana conductance
• Chiral Majorana edge state in a quantum anomalous Hall insulator-superconductor structure
• $4\pi$-periodic Josephson supercurrent in HgTe-based topological Josephson junctions
• Topological Superconductivity in a Phase-Controlled Josephson Junction
• Odd-Parity Pairing and Topological Superconductivity in a Strongly Spin-Orbit Coupled Semiconductor
• Edge states of Sr${}_2$RuO${}_4$ detected by in-plane tunneling spectroscopy
• Observation of the 4$\pi$-periodic Josephson effect in indium arsenide nanowires
• Unusual nature of fully-gapped superconductivity in In-doped SnTe
• Fermiology of Strongly Spin-Orbit Coupled Superconductor Sn1-xInxTe and its Implication to Topological Superconductivity
• Optimizing the superconducting transition temperature and upper critical field of Sn(1-x)In(x)Te
• Resonance-state-induced superconductivity at high Indium contents in In-doped SnTe
• Surface electronic state of superconducting topological crystalline insulator
• Studies of the superconducting properties of Sn1-xInxTe (x=0.38 to 0.45) using muon-spin spectroscopy
• Observation of surface states on heavily indium doped SnTe(111), a superconducting topological crystalline insulator
• Tailoring band-structure and band-filling in a simple cubic (IV, III) - VI superconductor
• Spin-singlet superconductivity in doped topological crystalline insulator Sn_{0.96}In_{0.04}Te
• Superconductivity in Sn${}_{1-x}$In${}_x$Te thin films grown by molecular beam epitaxy

Cited by in corpus (2)

• Observation of coexisting weak localization and superconducting fluctuations in strained Sn1-xInxTe thin films
• Superconductivity in tin telluride films grown by molecular beam epitaxy