Unconventional Charge Density Wave Order in the Pnictide Superconductor
Abstract
Ba(Ni1–xCox)2As2 is a structural homologue of the pnictide high temperature superconductor, Ba(Fe1–xCox)2As2, in which the Fe atoms are replaced by Ni. Superconductivity is highly suppressed in this system, reaching a maximum Tc = 2.3 K, compared to 24 K in its iron-based cousin, and the origin of this Tc suppression is not known. Using x-ray scattering, we show that Ba(Ni1–xCox)2As2 exhibits a unidirectional charge density wave (CDW) at its triclinic phase transition. The CDW is incommensurate, exhibits a sizable lattice distortion, and is accompanied by the appearance of α Fermi surface pockets in photoemission [B. Zhou et al., Phys. Rev. B 83, 035110 (2011)], suggesting it forms by an unconventional mechanism. Co doping suppresses the CDW, paralleling the behavior of antiferromagnetism in iron-based superconductors. Our study demonstrates that pnictide superconductors can exhibit competing CDW order, which may be the origin of Tc suppression in this system.
- Authors:
-
- Univ. of Illinois, Urbana, IL (United States)
- SLAC National Accelerator Lab., Menlo Park, CA (United States); Pohang Accelerator Lab, Gyeongbuk (Republic of Korea)
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Univ. of Maryland, College Park, MD (United States)
- Utrecht Univ., Utrecht (Netherlands)
- Publication Date:
- Research Org.:
- SLAC National Accelerator Lab., Menlo Park, CA (United States); Univ. of Illinois at Urbana-Champaign, IL (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1526465
- Alternate Identifier(s):
- OSTI ID: 1506734; OSTI ID: 1958823
- Grant/Contract Number:
- FG02-06ER46285; AC02-76SF00515; FA9550-14-1-0332; GBMF4542; GBMF4419
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 122; Journal Issue: 14; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; Charge density waves; Superconductivity; X-ray scattering; Pnictide superconductors; X-ray scattering, pnictide superconductors, charge density waves
Citation Formats
Lee, Sangjun, de la Peña, Gilberto, Sun, Stella X. -L., Mitrano, Matteo, Fang, Yizhi, Jang, Hoyoung, Lee, Jun -Sik, Eckberg, Chris, Campbell, Daniel, Collini, John, Paglione, Johnpierre, de Groot, F. M. F., and Abbamonte, Peter. Unconventional Charge Density Wave Order in the Pnictide Superconductor Ba(Ni1–xCox)2As2. United States: N. p., 2019.
Web. doi:10.1103/physrevlett.122.147601.
Lee, Sangjun, de la Peña, Gilberto, Sun, Stella X. -L., Mitrano, Matteo, Fang, Yizhi, Jang, Hoyoung, Lee, Jun -Sik, Eckberg, Chris, Campbell, Daniel, Collini, John, Paglione, Johnpierre, de Groot, F. M. F., & Abbamonte, Peter. Unconventional Charge Density Wave Order in the Pnictide Superconductor Ba(Ni1–xCox)2As2. United States. https://doi.org/10.1103/physrevlett.122.147601
Lee, Sangjun, de la Peña, Gilberto, Sun, Stella X. -L., Mitrano, Matteo, Fang, Yizhi, Jang, Hoyoung, Lee, Jun -Sik, Eckberg, Chris, Campbell, Daniel, Collini, John, Paglione, Johnpierre, de Groot, F. M. F., and Abbamonte, Peter. Fri .
"Unconventional Charge Density Wave Order in the Pnictide Superconductor Ba(Ni1–xCox)2As2". United States. https://doi.org/10.1103/physrevlett.122.147601. https://www.osti.gov/servlets/purl/1526465.
@article{osti_1526465,
title = {Unconventional Charge Density Wave Order in the Pnictide Superconductor Ba(Ni1–xCox)2As2},
author = {Lee, Sangjun and de la Peña, Gilberto and Sun, Stella X. -L. and Mitrano, Matteo and Fang, Yizhi and Jang, Hoyoung and Lee, Jun -Sik and Eckberg, Chris and Campbell, Daniel and Collini, John and Paglione, Johnpierre and de Groot, F. M. F. and Abbamonte, Peter},
abstractNote = {Ba(Ni1–xCox)2As2 is a structural homologue of the pnictide high temperature superconductor, Ba(Fe1–xCox)2As2, in which the Fe atoms are replaced by Ni. Superconductivity is highly suppressed in this system, reaching a maximum Tc = 2.3 K, compared to 24 K in its iron-based cousin, and the origin of this Tc suppression is not known. Using x-ray scattering, we show that Ba(Ni1–xCox)2As2 exhibits a unidirectional charge density wave (CDW) at its triclinic phase transition. The CDW is incommensurate, exhibits a sizable lattice distortion, and is accompanied by the appearance of α Fermi surface pockets in photoemission [B. Zhou et al., Phys. Rev. B 83, 035110 (2011)], suggesting it forms by an unconventional mechanism. Co doping suppresses the CDW, paralleling the behavior of antiferromagnetism in iron-based superconductors. Our study demonstrates that pnictide superconductors can exhibit competing CDW order, which may be the origin of Tc suppression in this system.},
doi = {10.1103/physrevlett.122.147601},
journal = {Physical Review Letters},
number = 14,
volume = 122,
place = {United States},
year = {Fri Apr 12 00:00:00 EDT 2019},
month = {Fri Apr 12 00:00:00 EDT 2019}
}
Web of Science
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