Publisher's Note: High-temperature superconductivity stabilized by electron-hole interband coupling in collapsed tetragonal phase of KFe2As2 under high pressure [Phys. Rev. B 91 , 060508(R) (2015)]

Nakajima, Yasuyuki; Wang, Renxiong; Metz, Tristin; Wang, Xiangfeng; Wang, Limin; Cynn, Hyunchae; Weir, Samuel T.; Jeffries, Jason R.; Paglione, Johnpierre

doi:10.1103/PhysRevB.91.099902

Title: Publisher's Note: High-temperature superconductivity stabilized by electron-hole interband coupling in collapsed tetragonal phase of ${KFe}_{2} {As}_{2}$ under high pressure [Phys. Rev. B 91 , 060508(R) (2015)]

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Abstract

Here, we report a high-pressure study of simultaneous low-temperature electrical resistivity and Hall effect measurements on high quality single-crystalline KFe₂As₂ using designer diamond anvil cell techniques with applied pressures up to 33 GPa. In the low pressure regime, we show that the superconducting transition temperature T_c finds a maximum onset value of 7 K near 2 GPa, in contrast to previous reports that find a minimum T_c and reversal of pressure dependence at this pressure. Upon applying higher pressures, this T_c is diminished until a sudden drastic enhancement occurs coincident with a first-order structural phase transition into a collapsed tetragonal phase. The appearance of a distinct superconducting phase above 13 GPa is also accompanied by a sudden reversal of dominant charge carrier sign, from hole- to electron-like, which agrees with our band calculations predicting the emergence of an electron pocket and diminishment of hole pockets upon Fermi surface reconstruction. Our results suggest the high-temperature superconducting phase in KFe₂As₂ is substantially enhanced by the presence of nested electron and hole pockets, providing the key ingredient of high-T_c superconductivity in iron pnictide superconductors.

Authors:

Nakajima, Yasuyuki ^[1]; Wang, Renxiong ^[1]; Metz, Tristin ^[1]; Wang, Xiangfeng ^[1]; Wang, Limin ^[1]; Cynn, Hyunchae ^[1]; Weir, Samuel T. ^[1]; Jeffries, Jason R. ^[2]; Paglione, Johnpierre ^[1]

Univ. of Maryland, College Park, MD (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Publication Date:: Mon Mar 09 00:00:00 EDT 2015

Research Org.:: Carnegie Institution of Washington, Washington, D.C. (United States)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1335147

Grant/Contract Number:: NA0002006

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review. B, Condensed Matter and Materials Physics

Additional Journal Information:: Journal Volume: 91; Journal Issue: 9; Journal ID: ISSN 1098-0121

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    Nakajima, Yasuyuki, Wang, Renxiong, Metz, Tristin, Wang, Xiangfeng, Wang, Limin, Cynn, Hyunchae, Weir, Samuel T., Jeffries, Jason R., and Paglione, Johnpierre. Publisher's Note: High-temperature superconductivity stabilized by electron-hole interband coupling in collapsed tetragonal phase of KFe2As2 under high pressure [Phys. Rev. B 91 , 060508(R) (2015)].  United States: N. p., 2015. 
Web.  doi:10.1103/PhysRevB.91.099902.

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                    Nakajima, Yasuyuki, Wang, Renxiong, Metz, Tristin, Wang, Xiangfeng, Wang, Limin, Cynn, Hyunchae, Weir, Samuel T., Jeffries, Jason R., & Paglione, Johnpierre. Publisher's Note: High-temperature superconductivity stabilized by electron-hole interband coupling in collapsed tetragonal phase of KFe2As2 under high pressure [Phys. Rev. B 91 , 060508(R) (2015)].  United States.  https://doi.org/10.1103/PhysRevB.91.099902

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                    Nakajima, Yasuyuki, Wang, Renxiong, Metz, Tristin, Wang, Xiangfeng, Wang, Limin, Cynn, Hyunchae, Weir, Samuel T., Jeffries, Jason R., and Paglione, Johnpierre. Mon .  
"Publisher's Note: High-temperature superconductivity stabilized by electron-hole interband coupling in collapsed tetragonal phase of KFe2As2 under high pressure [Phys. Rev. B 91 , 060508(R) (2015)]".  United States.  https://doi.org/10.1103/PhysRevB.91.099902.  https://www.osti.gov/servlets/purl/1335147.

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@article{osti_1335147,

  title        = {Publisher's Note: High-temperature superconductivity stabilized by electron-hole interband coupling in collapsed tetragonal phase of KFe2As2 under high pressure [Phys. Rev. B 91 , 060508(R) (2015)]},

  author       = {Nakajima, Yasuyuki and Wang, Renxiong and Metz, Tristin and Wang, Xiangfeng and Wang, Limin and Cynn, Hyunchae and Weir, Samuel T. and Jeffries, Jason R. and Paglione, Johnpierre},

  abstractNote = {Here, we report a high-pressure study of simultaneous low-temperature electrical resistivity and Hall effect measurements on high quality single-crystalline KFe2As2 using designer diamond anvil cell techniques with applied pressures up to 33 GPa. In the low pressure regime, we show that the superconducting transition temperature Tc finds a maximum onset value of 7 K near 2 GPa, in contrast to previous reports that find a minimum Tc and reversal of pressure dependence at this pressure. Upon applying higher pressures, this Tc is diminished until a sudden drastic enhancement occurs coincident with a first-order structural phase transition into a collapsed tetragonal phase. The appearance of a distinct superconducting phase above 13 GPa is also accompanied by a sudden reversal of dominant charge carrier sign, from hole- to electron-like, which agrees with our band calculations predicting the emergence of an electron pocket and diminishment of hole pockets upon Fermi surface reconstruction. Our results suggest the high-temperature superconducting phase in KFe2As2 is substantially enhanced by the presence of nested electron and hole pockets, providing the key ingredient of high-Tc superconductivity in iron pnictide superconductors.},

  doi          = {10.1103/PhysRevB.91.099902},

  journal      = {Physical Review. B, Condensed Matter and Materials Physics},

  number       = 9,

  volume       = 91,

  place        = {United States},

  year         = {Mon Mar 09 00:00:00 EDT 2015},

  month        = {Mon Mar 09 00:00:00 EDT 2015}

}

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Title: Publisher's Note: High-temperature superconductivity stabilized by electron-hole interband coupling in collapsed tetragonal phase of KFe 2 As 2 under high pressure [Phys. Rev. B 91 , 060508(R) (2015)]

Abstract

Citation Formats

Title: Publisher's Note: High-temperature superconductivity stabilized by electron-hole interband coupling in collapsed tetragonal phase of ${KFe}_{2} {As}_{2}$ under high pressure [Phys. Rev. B 91 , 060508(R) (2015)]