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Creation, stabilization, and investigation at ambient pressure of pressure-induced superconductivity in Bi0.5Sb1.5Te3.

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Title: Creation, stabilization, and investigation at ambient pressure of pressure-induced superconductivity in Bi0.5Sb1.5Te3.
Authors: Liangzi Deng, Busheng Wang, Halbert, Clayton, Schulze, Daniel J., Gooch, Melissa, Bontke, Trevor, Ting-Wei Kuo, Xin Shi, Shaowei Song, Salke, Nilesh, Hung-Duen Yang, Zhifeng Ren, Hemley, Russell J., Zurek, Eva, Prasankumar, Rohit P., Ching-Wu Chu
Source: Proceedings of the National Academy of Sciences of the United States of America; 2/11/2025, Vol. 122 Issue 6, p1-8, 18p
Subject Terms: DIAMOND anvil cell, SUPERCONDUCTIVITY, CRITICAL temperature, THERMAL stability, SEMICONDUCTORS
Abstract: In light of breakthroughs in superconductivity under high pressure, and considering that record critical temperatures (Tcs) across various systems have been achieved under high pressure, the primary challenge for higher Tc should no longer solely be to increase Tc under extreme conditions but also to reduce, or ideally eliminate, the need for applied pressure in retaining pressure-induced or -enhanced superconductivity. The topological semiconductor Bi0.5Sb1.5Te3 (BST) was chosen to demonstrate our approach to addressing this challenge and exploring its intriguing physics. Under pressures up to ~50 GPa, three superconducting phases (BST-I,-II, and -III) were observed. A superconducting phase in BST-I appears at ~4 GPa, without a structural transition, suggesting the possible topological nature of this phase. Using the pressure-quench protocol (PQP) recently developed by us, we successfully retained this pressure-induced phase at ambient pressure and revealed the bulk nature of the state. Significantly, this demonstrates recovery of a pressure-quenched sample from a diamond anvil cell at room temperature with the pressure-induced phase retained at ambient pressure. Other superconducting phases were retained in BST-II and -III at ambient pressure and subjected to thermal and temporal stability testing. Superconductivity was also found in BST with Tc up to 10.2 K, the record for this compound series. While PQP maintains superconducting phases in BST at ambient pressure, both depressurization and PQP enhance its Tc, possibly due to microstructures formed during these processes, offering an added avenue to raise Tc. These findings are supported by our density-functional theory calculations. [ABSTRACT FROM AUTHOR]
Copyright of Proceedings of the National Academy of Sciences of the United States of America is the property of National Academy of Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Creation, stabilization, and investigation at ambient pressure of pressure-induced superconductivity in Bi<subscript>0.5</subscript>Sb<subscript>1.5</subscript>Te<subscript>3</subscript>.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Liangzi+Deng%22">Liangzi Deng</searchLink><br /><searchLink fieldCode="AR" term="%22Busheng+Wang%22">Busheng Wang</searchLink><br /><searchLink fieldCode="AR" term="%22Halbert%2C+Clayton%22">Halbert, Clayton</searchLink><br /><searchLink fieldCode="AR" term="%22Schulze%2C+Daniel+J%2E%22">Schulze, Daniel J.</searchLink><br /><searchLink fieldCode="AR" term="%22Gooch%2C+Melissa%22">Gooch, Melissa</searchLink><br /><searchLink fieldCode="AR" term="%22Bontke%2C+Trevor%22">Bontke, Trevor</searchLink><br /><searchLink fieldCode="AR" term="%22Ting-Wei+Kuo%22">Ting-Wei Kuo</searchLink><br /><searchLink fieldCode="AR" term="%22Xin+Shi%22">Xin Shi</searchLink><br /><searchLink fieldCode="AR" term="%22Shaowei+Song%22">Shaowei Song</searchLink><br /><searchLink fieldCode="AR" term="%22Salke%2C+Nilesh%22">Salke, Nilesh</searchLink><br /><searchLink fieldCode="AR" term="%22Hung-Duen+Yang%22">Hung-Duen Yang</searchLink><br /><searchLink fieldCode="AR" term="%22Zhifeng+Ren%22">Zhifeng Ren</searchLink><br /><searchLink fieldCode="AR" term="%22Hemley%2C+Russell+J%2E%22">Hemley, Russell J.</searchLink><br /><searchLink fieldCode="AR" term="%22Zurek%2C+Eva%22">Zurek, Eva</searchLink><br /><searchLink fieldCode="AR" term="%22Prasankumar%2C+Rohit+P%2E%22">Prasankumar, Rohit P.</searchLink><br /><searchLink fieldCode="AR" term="%22Ching-Wu+Chu%22">Ching-Wu Chu</searchLink>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: Proceedings of the National Academy of Sciences of the United States of America; 2/11/2025, Vol. 122 Issue 6, p1-8, 18p
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22DIAMOND+anvil+cell%22">DIAMOND anvil cell</searchLink><br /><searchLink fieldCode="DE" term="%22SUPERCONDUCTIVITY%22">SUPERCONDUCTIVITY</searchLink><br /><searchLink fieldCode="DE" term="%22CRITICAL+temperature%22">CRITICAL temperature</searchLink><br /><searchLink fieldCode="DE" term="%22THERMAL+stability%22">THERMAL stability</searchLink><br /><searchLink fieldCode="DE" term="%22SEMICONDUCTORS%22">SEMICONDUCTORS</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In light of breakthroughs in superconductivity under high pressure, and considering that record critical temperatures (T<subscript>c</subscript>s) across various systems have been achieved under high pressure, the primary challenge for higher T<subscript>c</subscript> should no longer solely be to increase Tc under extreme conditions but also to reduce, or ideally eliminate, the need for applied pressure in retaining pressure-induced or -enhanced superconductivity. The topological semiconductor Bi<subscript>0.5</subscript>Sb<subscript>1.5</subscript>Te<subscript>3</subscript> (BST) was chosen to demonstrate our approach to addressing this challenge and exploring its intriguing physics. Under pressures up to ~50 GPa, three superconducting phases (BST-I,-II, and -III) were observed. A superconducting phase in BST-I appears at ~4 GPa, without a structural transition, suggesting the possible topological nature of this phase. Using the pressure-quench protocol (PQP) recently developed by us, we successfully retained this pressure-induced phase at ambient pressure and revealed the bulk nature of the state. Significantly, this demonstrates recovery of a pressure-quenched sample from a diamond anvil cell at room temperature with the pressure-induced phase retained at ambient pressure. Other superconducting phases were retained in BST-II and -III at ambient pressure and subjected to thermal and temporal stability testing. Superconductivity was also found in BST with T<subscript>c</subscript> up to 10.2 K, the record for this compound series. While PQP maintains superconducting phases in BST at ambient pressure, both depressurization and PQP enhance its T<subscript>c</subscript>, possibly due to microstructures formed during these processes, offering an added avenue to raise T<subscript>c</subscript>. These findings are supported by our density-functional theory calculations. [ABSTRACT FROM AUTHOR]
– Name: Abstract
  Label:
  Group: Ab
  Data: <i>Copyright of Proceedings of the National Academy of Sciences of the United States of America is the property of National Academy of Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1073/pnas.2423102122
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      – Code: eng
        Text: English
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        PageCount: 18
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      – SubjectFull: DIAMOND anvil cell
        Type: general
      – SubjectFull: SUPERCONDUCTIVITY
        Type: general
      – SubjectFull: CRITICAL temperature
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      – SubjectFull: THERMAL stability
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      – SubjectFull: SEMICONDUCTORS
        Type: general
    Titles:
      – TitleFull: Creation, stabilization, and investigation at ambient pressure of pressure-induced superconductivity in Bi0.5Sb1.5Te3.
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            NameFull: Liangzi Deng
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              Text: 2/11/2025
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            – TitleFull: Proceedings of the National Academy of Sciences of the United States of America
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