The pressure-enhanced superconducting phase of Sr $$_x$$ x –Bi $$_2$$ 2 Se $$_3$$ 3 probed by hard point contact spectroscopy

Abstract The superconducting systems emerging from topological insulators upon metal ion intercalation or application of high pressure are ideal for investigation of possible topological superconductivity. In this context, Sr-intercalated Bi $$_2$$ 2 Se $$_3$$ 3 is specially interesting because it d...

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Autores principales:	Ritesh Kumar, Aastha Vasdev, Shekhar Das, Sandeep Howlader, Karn S. Jat, Prakriti Neha, Satyabrata Patnaik, Goutam Sheet
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/85c16ce184cf413fb67cefd64aaaa6fb
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spelling	oai:doaj.org-article:85c16ce184cf413fb67cefd64aaaa6fb2021-12-02T14:21:58ZThe pressure-enhanced superconducting phase of Sr $$_x$$ x –Bi $$_2$$ 2 Se $$_3$$ 3 probed by hard point contact spectroscopy10.1038/s41598-021-83411-w2045-2322https://doaj.org/article/85c16ce184cf413fb67cefd64aaaa6fb2021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-83411-whttps://doaj.org/toc/2045-2322Abstract The superconducting systems emerging from topological insulators upon metal ion intercalation or application of high pressure are ideal for investigation of possible topological superconductivity. In this context, Sr-intercalated Bi $$_2$$ 2 Se $$_3$$ 3 is specially interesting because it displays pressure induced re-entrant superconductivity where the high pressure phase shows almost two times higher $$T_c$$ T c than the ambient superconducting phase ( $$T_C\sim 2.9$$ T C ∼ 2.9 K). Interestingly, unlike the ambient phase, the pressure-induced superconducting phase shows strong indication of unconventional superconductivity. However, since the pressure-induced phase remains inaccessible to spectroscopic techniques, the detailed study of the phase remained an unattained goal. Here we show that the high-pressure phase can be realized under a mesoscopic point contact, where transport spectroscopy can be used to probe the spectroscopic properties of the pressure-induced phase. We find that the point contact junctions on the high-pressure phase show unusual response to magnetic field supporting the possibility of unconventional superconductivity.Ritesh KumarAastha VasdevShekhar DasSandeep HowladerKarn S. JatPrakriti NehaSatyabrata PatnaikGoutam SheetNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ritesh Kumar Aastha Vasdev Shekhar Das Sandeep Howlader Karn S. Jat Prakriti Neha Satyabrata Patnaik Goutam Sheet The pressure-enhanced superconducting phase of Sr $$_x$$ x –Bi $$_2$$ 2 Se $$_3$$ 3 probed by hard point contact spectroscopy
description	Abstract The superconducting systems emerging from topological insulators upon metal ion intercalation or application of high pressure are ideal for investigation of possible topological superconductivity. In this context, Sr-intercalated Bi $$_2$$ 2 Se $$_3$$ 3 is specially interesting because it displays pressure induced re-entrant superconductivity where the high pressure phase shows almost two times higher $$T_c$$ T c than the ambient superconducting phase ( $$T_C\sim 2.9$$ T C ∼ 2.9 K). Interestingly, unlike the ambient phase, the pressure-induced superconducting phase shows strong indication of unconventional superconductivity. However, since the pressure-induced phase remains inaccessible to spectroscopic techniques, the detailed study of the phase remained an unattained goal. Here we show that the high-pressure phase can be realized under a mesoscopic point contact, where transport spectroscopy can be used to probe the spectroscopic properties of the pressure-induced phase. We find that the point contact junctions on the high-pressure phase show unusual response to magnetic field supporting the possibility of unconventional superconductivity.
format	article
author	Ritesh Kumar Aastha Vasdev Shekhar Das Sandeep Howlader Karn S. Jat Prakriti Neha Satyabrata Patnaik Goutam Sheet
author_facet	Ritesh Kumar Aastha Vasdev Shekhar Das Sandeep Howlader Karn S. Jat Prakriti Neha Satyabrata Patnaik Goutam Sheet
author_sort	Ritesh Kumar
title	The pressure-enhanced superconducting phase of Sr $$_x$$ x –Bi $$_2$$ 2 Se $$_3$$ 3 probed by hard point contact spectroscopy
title_short	The pressure-enhanced superconducting phase of Sr $$_x$$ x –Bi $$_2$$ 2 Se $$_3$$ 3 probed by hard point contact spectroscopy
title_full	The pressure-enhanced superconducting phase of Sr $$_x$$ x –Bi $$_2$$ 2 Se $$_3$$ 3 probed by hard point contact spectroscopy
title_fullStr	The pressure-enhanced superconducting phase of Sr $$_x$$ x –Bi $$_2$$ 2 Se $$_3$$ 3 probed by hard point contact spectroscopy
title_full_unstemmed	The pressure-enhanced superconducting phase of Sr $$_x$$ x –Bi $$_2$$ 2 Se $$_3$$ 3 probed by hard point contact spectroscopy
title_sort	pressure-enhanced superconducting phase of sr $$_x$$ x –bi $$_2$$ 2 se $$_3$$ 3 probed by hard point contact spectroscopy
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/85c16ce184cf413fb67cefd64aaaa6fb
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The pressure-enhanced superconducting phase of Sr $$_x$$ x –Bi $$_2$$ 2 Se $$_3$$ 3 probed by hard point contact spectroscopy

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