skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Tunable quantum critical point and detached superconductivity in Al-doped CrAs

Abstract

The origin of unconventional superconductivity and its relationship to a T = 0 K quantum critical point (QCP), which is hidden inside the dome of a superconducting state, have long been an outstanding puzzle in strongly correlated superconductors. The observation and tuning of the hidden QCP, which is key to resolving the mystery, however, has been rarely reported. Here we report the controlling of a hidden QCP in the helical antiferromagnet CrAs and separation of the tuned QCP from the pressure-induced superconducting phase. The Al doping in CrAs increases the antiferromagnetic ordering temperature T N from 265 to 275 K, while it suppresses the QCP from 8 to 4.5 kbar. Pressure-induced superconductivity in the high-pressure regime is almost independent of Al doping, but superconductivity below 6 kbar is suppressed, revealing the clear separation between the tuned antiferromagnetic QCP and T c maximum. These discoveries illustrate subtleties in the interplay between superconductivity and quantum criticality and warrant a deeper insight in understanding of unconventional superconductivity.

Authors:
 [1];  [1];  [1];  [1];  [1];  [2];  [1]
  1. Sungkyunkwan Univ., Suwon (South Korea). Center for Quantum Materials and Superconductivity (CQMS) & Dept. of Physics
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1565886
Report Number(s):
LA-UR-18-22403
Journal ID: ISSN 2397-4648
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
npj Quantum Materials
Additional Journal Information:
Journal Volume: 4; Journal Issue: 1; Journal ID: ISSN 2397-4648
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; High Magnetic Field Science

Citation Formats

Park, Sungmin, Shin, Soohyeon, Kim, Sung-Il, Kim, Suyoung, Park, Chan-Koo, Thompson, Joe D., and Park, Tuson. Tunable quantum critical point and detached superconductivity in Al-doped CrAs. United States: N. p., 2019. Web. doi:10.1038/s41535-019-0188-6.
Park, Sungmin, Shin, Soohyeon, Kim, Sung-Il, Kim, Suyoung, Park, Chan-Koo, Thompson, Joe D., & Park, Tuson. Tunable quantum critical point and detached superconductivity in Al-doped CrAs. United States. doi:10.1038/s41535-019-0188-6.
Park, Sungmin, Shin, Soohyeon, Kim, Sung-Il, Kim, Suyoung, Park, Chan-Koo, Thompson, Joe D., and Park, Tuson. Thu . "Tunable quantum critical point and detached superconductivity in Al-doped CrAs". United States. doi:10.1038/s41535-019-0188-6. https://www.osti.gov/servlets/purl/1565886.
@article{osti_1565886,
title = {Tunable quantum critical point and detached superconductivity in Al-doped CrAs},
author = {Park, Sungmin and Shin, Soohyeon and Kim, Sung-Il and Kim, Suyoung and Park, Chan-Koo and Thompson, Joe D. and Park, Tuson},
abstractNote = {The origin of unconventional superconductivity and its relationship to a T = 0 K quantum critical point (QCP), which is hidden inside the dome of a superconducting state, have long been an outstanding puzzle in strongly correlated superconductors. The observation and tuning of the hidden QCP, which is key to resolving the mystery, however, has been rarely reported. Here we report the controlling of a hidden QCP in the helical antiferromagnet CrAs and separation of the tuned QCP from the pressure-induced superconducting phase. The Al doping in CrAs increases the antiferromagnetic ordering temperature TN from 265 to 275 K, while it suppresses the QCP from 8 to 4.5 kbar. Pressure-induced superconductivity in the high-pressure regime is almost independent of Al doping, but superconductivity below 6 kbar is suppressed, revealing the clear separation between the tuned antiferromagnetic QCP and Tc maximum. These discoveries illustrate subtleties in the interplay between superconductivity and quantum criticality and warrant a deeper insight in understanding of unconventional superconductivity.},
doi = {10.1038/s41535-019-0188-6},
journal = {npj Quantum Materials},
issn = {2397-4648},
number = 1,
volume = 4,
place = {United States},
year = {2019},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Fig. 1 Fig. 1: Schematic temperature-control parameter (T–$δ$) phase diagram of superconductivity and quantum critical matter. a Unconventional superconductivity is often observed in proximity to a projected quantum critical point ($δ$c), where non-Fermi liquid behavior is observed in the normal state above the SC phase. b When $δ$c is tuned to amore » new point $δ$c', the SC phase can be either moved to the new $δ$c' or remain at the old $δ$c—see the main text for discussion« less

Save / Share:

Works referenced in this record:

Anomalous anisotropic compression behavior of superconducting CrAs under high pressure
journal, November 2015

  • Yu, Zhenhai; Wu, Wei; Hu, Qingyang
  • Proceedings of the National Academy of Sciences, Vol. 112, Issue 48
  • DOI: 10.1073/pnas.1520570112

Coexistence of antiferromagnetism and superconductivity in Ce Rh In 5 under high pressure and magnetic field
journal, July 2006


Non-Fermi-liquid behavior in d - and f -electron metals
journal, October 2001


Topological surface states in nodal superconductors
journal, May 2015


Superconductivity in the vicinity of antiferromagnetic order in CrAs
journal, November 2014

  • Wu, Wei; Cheng, Jinguang; Matsubayashi, Kazuyuki
  • Nature Communications, Vol. 5, Issue 1
  • DOI: 10.1038/ncomms6508

From quantum matter to high-temperature superconductivity in copper oxides
journal, February 2015

  • Keimer, B.; Kivelson, S. A.; Norman, M. R.
  • Nature, Vol. 518, Issue 7538
  • DOI: 10.1038/nature14165

Superconductivity without phonons
journal, December 2007

  • Monthoux, P.; Pines, D.; Lonzarich, G. G.
  • Nature, Vol. 450, Issue 7173
  • DOI: 10.1038/nature06480

Pressure-induced electronic phase separation of magnetism and superconductivity in CrAs
journal, September 2015

  • Khasanov, Rustem; Guguchia, Zurab; Eremin, Ilya
  • Scientific Reports, Vol. 5, Issue 1
  • DOI: 10.1038/srep13788

Pressure dependence of the magnetic order in CrAs: A neutron diffraction investigation
journal, January 2015


Fermi-liquid instabilities at magnetic quantum phase transitions
journal, August 2007

  • Löhneysen, Hilbert v.; Rosch, Achim; Vojta, Matthias
  • Reviews of Modern Physics, Vol. 79, Issue 3
  • DOI: 10.1103/RevModPhys.79.1015

Isotropic quantum scattering and unconventional superconductivity
journal, November 2008


Controlling superconductivity by tunable quantum critical points
journal, March 2015

  • Seo, S.; Park, E.; Bauer, E. D.
  • Nature Communications, Vol. 6, Issue 1
  • DOI: 10.1038/ncomms7433

Evidence for triplet superconductivity near an antiferromagnetic instability in CrAs
journal, July 2018


Structural and magnetic phase diagram of CrAs and its relationship with pressure-induced superconductivity
journal, February 2016


Link between spin fluctuations and electron pairing in copper oxide superconductors
journal, August 2011


Breakdown of the Bardeen–Cooper–Schrieffer ground state at a quantum phase transition
journal, May 2009

  • Jaramillo, R.; Feng, Yejun; Lang, J. C.
  • Nature, Vol. 459, Issue 7245
  • DOI: 10.1038/nature08008

Antiferromagnetism in Chromium and its Alloys
journal, March 1969

  • Rice, T. M.; Barker, A. S.; Halperin, B. I.
  • Journal of Applied Physics, Vol. 40, Issue 3
  • DOI: 10.1063/1.1657663

Observation of Two Distinct Superconducting Phases in CeCu2Si2
journal, December 2003


Magnetically mediated superconductivity in heavy fermion compounds
journal, July 1998

  • Mathur, N. D.; Grosche, F. M.; Julian, S. R.
  • Nature, Vol. 394, Issue 6688
  • DOI: 10.1038/27838

Quantum criticality in heavy-fermion metals
journal, March 2008

  • Gegenwart, Philipp; Si, Qimiao; Steglich, Frank
  • Nature Physics, Vol. 4, Issue 3
  • DOI: 10.1038/nphys892

Transport near a quantum critical point in BaFe2(As1−xPx)2
journal, January 2014

  • Analytis, James G.; Kuo, H-H.; McDonald, Ross D.
  • Nature Physics, Vol. 10, Issue 3
  • DOI: 10.1038/nphys2869

Superconductivity of 2.2 K under Pressure in Helimagnet CrAs
journal, September 2014

  • Kotegawa, Hisashi; Nakahara, Shingo; Tou, Hideki
  • Journal of the Physical Society of Japan, Vol. 83, Issue 9
  • DOI: 10.7566/JPSJ.83.093702

Unconventional Superconductivity and Antiferromagnetic Quantum Critical Behavior in the Isovalent-Doped BaFe 2 ( As 1 x P x ) 2
journal, September 2010


Low temperature properties of pnictide CrAs single crystal
journal, July 2010

  • Wu, Wei; Zhang, XiaoDong; Yin, ZhiHua
  • Science China Physics, Mechanics and Astronomy, Vol. 53, Issue 7
  • DOI: 10.1007/s11433-010-4006-1

Hidden magnetism and quantum criticality in the heavy fermion superconductor CeRhIn5
journal, March 2006


A common thread: The pairing interaction for unconventional superconductors
journal, October 2012


    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.