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Structural and magnetic phase transitions near optimal superconductivity in BaFe2(As1-xPx)2

Journal Article · · Physical Review Letters
 [1];  [1];  [1];  [1];  [2];  [1];  [1];  [3];  [4];  [4];  [4];  [4];  [5];  [6];  [6];  [7];  [8];  [9];  [9];  [10]
  1. Chinese Academy of Sciences (CAS), Beijing (China)
  2. Chinese Academy of Sciences (CAS), Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
  5. Canadian Neutron Beam Centre, Chalk River, ON (Canada)
  6. Paul Scherrer Inst. (PSI), Villigen (Switzerland)
  7. Technische Univ. Munchen, Garching (Germany)
  8. Max-Planck-Institut fur Festkorperforschung, Stuttgart (Germany); Max Planck Society Outstation at the Forschungsneutronenquelle Heinz Maier-Leibnitz, Garching (Germany)
  9. Renmin Univ. of China, Beijing (China)
  10. Chinese Academy of Sciences (CAS), Beijing (China); Rice Univ., Houston, TX (United States)
In this study, we use nuclear magnetic resonance (NMR), high-resolution x-ray and neutron scattering to study structural and magnetic phase transitions in phosphorus-doped BaFe2(As1-xPx)2. Thus, previous transport, NMR, specific heat, and magnetic penetration depth measurements have provided compelling evidence for the presence of a quantum critical point (QCP) near optimal superconductivity at x = 0.3. However, we show that the tetragonal-to-orthorhombic structural (Ts) and paramagnetic to antiferromagnetic (AF, TN) transitions in BaFe2(As1-xPx)2 are always coupled and approach to TN ≈ Ts ≥ Tc (≈ 29 K) for x = 0.29 before vanishing abruptly for x ≥ 0.3. These results suggest that AF order in BaFe2(As1-xPx)2 disappears in a weakly first order fashion near optimal superconductivity, much like the electron-doped iron pnictides with an avoided QCP.
Research Organization:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-06CH11357; AC02-07CH11358
OSTI ID:
1227296
Alternate ID(s):
OSTI ID: 1180557
OSTI ID: 1391767
Report Number(s):
IS-J--8657
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 15 Vol. 114; ISSN 0031-9007; ISSN PRLTAO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (20)

Impurity effects on spin dynamics in magnetic and superconducting iron pnictides and chalcogenides: Impurity effects on spin dynamics in iron pnictides and chalcogenides journal December 2016
Local orthorhombic lattice distortions in the paramagnetic tetragonal phase of superconducting NaFe1−xNixAs journal August 2018
c-axis pressure-induced antiferromagnetic order in optimally P-doped BaFe2(As0.70P0.30)2 superconductor journal September 2018
Orbital-anisotropic electronic structure in the nonmagnetic state of BaFe2(As1−xP x )2 superconductors journal February 2018
Reciprocity between local moments and collective magnetic excitations in the phase diagram of BaFe2(As1−xPx)2 journal November 2019
Unconventional superconductivity journal April 2017
Unconventional superconductivity journal November 1995
Anomalous sharp peak in the London penetration depth induced by the nodeless-to-nodal superconducting transition in BaFe 2 ( As 1 − x P x ) 2 journal October 2019
Uniaxial c -axis pressure effects on the underdoped superconductor BaFe 2 ( As 0.72 P 0.28 ) 2 journal January 2020
Phase transition beneath the superconducting dome in BaFe 2 ( As 1 − x P x ) 2 journal August 2015
Critical quadrupole fluctuations and collective modes in iron pnictide superconductors journal February 2016
Persistence of slow fluctuations in the overdoped regime of Ba ( Fe 1 − x Rh x ) 2 As 2 superconductors journal June 2016
Spin excitation anisotropy in the optimally isovalent-doped superconductor BaFe 2 ( As 0.7 P 0.3 ) 2 journal November 2017
Dependence of the absolute value of the penetration depth in ( Ba 1 − x K x ) Fe 2 As 2 on doping journal August 2018
NMR Evidence for Inhomogeneous Nematic Fluctuations in BaFe 2 ( As 1 − x P x ) 2 journal March 2016
Nematic Quantum Critical Fluctuations in BaFe 2 − x Ni x As 2 journal October 2016
Imaging Anomalous Nematic Order and Strain in Optimally Doped BaFe 2 ( As , P ) 2 journal July 2018
Hedgehog Spin-Vortex Crystal Antiferromagnetic Quantum Criticality in CaK ( Fe 1 − x Ni x ) 4 As 4 Revealed by NMR journal September 2018
Antiferromagnetic order and spin dynamics in iron-based superconductors journal August 2015
Antiferromagnetic order and spin dynamics in iron-based superconductors text January 2015

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