Volovik effect and Fermi-liquid behavior in the s-wave superconductor CaPd2As2: As75 NMR-NQR measurements

Ding, Q. -P.; Wiecki, P.; Anand, V. K.; Sangeetha, N. S.; Lee, Y.; Johnston, D. C.; Furukawa, Y.

doi:10.1103/PhysRevB.93.140502

Title: Volovik effect and Fermi-liquid behavior in the $s$ -wave superconductor ${CaPd}_{2} {As}_{2} : {}^{75}{As}$ NMR-NQR measurements

Abstract

The electronic and magnetic properties of the collapsed-tetragonal CaPd₂As₂ superconductor (SC) with a transition temperature of 1.27 K have been investigated by ⁷⁵As nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) measurements. The temperature (T) dependence of the nuclear spin lattice relaxation rates (1/T₁) and the Knight shifts indicate the absence of magnetic correlations in the normal state. In the SC state, 1/T₁ measured by ⁷⁵As NQR shows a clear Hebel-Slichter (HS) peak just below T_c and decreases exponentially at lower T, confirming a conventional s-wave SC. Additionally, the Volovik effect, also known as the Doppler shift effect, has been clearly evidenced by the observation of the suppression of the HS peak with applied magnetic field.

Authors:

Ding, Q. -P. ^[1]; Wiecki, P. ^[1]; Anand, V. K. ^[2]; Sangeetha, N. S. ^[1]; Lee, Y. ^[1]; Johnston, D. C. ^[1]; Furukawa, Y. ^[1]

Ames Lab. and Iowa State Univ., Ames, IA (United States)
Ames Lab. and Iowa State Univ., Ames, IA (United States); Helmholtz-Zentrum Berlin fur Materialien und Energie, Berlin (Germany)

Publication Date:: Thu Apr 07 00:00:00 EDT 2016

Research Org.:: Ames Lab., Ames, IA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1254303

Alternate Identifier(s):: OSTI ID: 1246178

Report Number(s):: IS-J-8997
Journal ID: ISSN 2469-9950; PRBMDO

Grant/Contract Number:: AC02-07CH11358

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review B

Additional Journal Information:: Journal Volume: 93; Journal Issue: 14; Journal ID: ISSN 2469-9950

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats


                    Ding, Q. -P., Wiecki, P., Anand, V. K., Sangeetha, N. S., Lee, Y., Johnston, D. C., and Furukawa, Y. Volovik effect and Fermi-liquid behavior in the s-wave superconductor CaPd2As2: As75 NMR-NQR measurements.  United States: N. p., 2016. 
Web.  doi:10.1103/PhysRevB.93.140502.

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                    Ding, Q. -P., Wiecki, P., Anand, V. K., Sangeetha, N. S., Lee, Y., Johnston, D. C., & Furukawa, Y. Volovik effect and Fermi-liquid behavior in the s-wave superconductor CaPd2As2: As75 NMR-NQR measurements.  United States.  https://doi.org/10.1103/PhysRevB.93.140502

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                    Ding, Q. -P., Wiecki, P., Anand, V. K., Sangeetha, N. S., Lee, Y., Johnston, D. C., and Furukawa, Y. Thu .  
"Volovik effect and Fermi-liquid behavior in the s-wave superconductor CaPd2As2: As75 NMR-NQR measurements".  United States.  https://doi.org/10.1103/PhysRevB.93.140502.  https://www.osti.gov/servlets/purl/1254303.

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@article{osti_1254303,

  title        = {Volovik effect and Fermi-liquid behavior in the s-wave superconductor CaPd2As2: As75 NMR-NQR measurements},

  author       = {Ding, Q. -P. and Wiecki, P. and Anand, V. K. and Sangeetha, N. S. and Lee, Y. and Johnston, D. C. and Furukawa, Y.},

  abstractNote = {The electronic and magnetic properties of the collapsed-tetragonal CaPd2As2 superconductor (SC) with a transition temperature of 1.27 K have been investigated by 75As nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) measurements. The temperature (T) dependence of the nuclear spin lattice relaxation rates (1/T1) and the Knight shifts indicate the absence of magnetic correlations in the normal state. In the SC state, 1/T1 measured by 75As NQR shows a clear Hebel-Slichter (HS) peak just below Tc and decreases exponentially at lower T, confirming a conventional s-wave SC. Additionally, the Volovik effect, also known as the Doppler shift effect, has been clearly evidenced by the observation of the suppression of the HS peak with applied magnetic field.},

  doi          = {10.1103/PhysRevB.93.140502},

  journal      = {Physical Review B},

  number       = 14,

  volume       = 93,

  place        = {United States},

  year         = {Thu Apr 07 00:00:00 EDT 2016},

  month        = {Thu Apr 07 00:00:00 EDT 2016}

}

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https://doi.org/10.1103/PhysRevB.93.140502

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Spin Dynamics in Iron-Based Layered Superconductor ${(La}_{0.87} {Ca}_{0.13}) FePO$ Revealed by ${}^{31}P$ and ${}^{139}{La}$ NMR Studies
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Coexistence of antiferromagnetic and ferromagnetic spin correlations in ${SrCo}_{2} {As}_{2}$ revealed by ${}^{59}{Co}$ and ${}^{75}{As}$ NMR
journal, June 2015

Competing Magnetic Fluctuations in Iron Pnictide Superconductors: Role of Ferromagnetic Spin Correlations Revealed by NMR
journal, September 2015

First-order structural phase transition in ${CaFe}_{2} {As}_{2}$
journal, July 2008

Lattice and magnetic instabilities in ${CaFe}_{2} {As}_{2}$ : A single-crystal neutron diffraction study
journal, September 2008

Structural, magnetic and superconducting phase transitions in CaFe2As2 under ambient and applied pressure
journal, May 2009

Pressure Induced Superconductivity in ${CaFe}_{2} {As}_{2}$
journal, July 2008

Pressure-induced superconducting state of antiferromagnetic ${CaFe}_{2} {As}_{2}$
journal, July 2009

Absence of superconductivity in single-phase ${CaFe}_{2} {As}_{2}$ under hydrostatic pressure
journal, January 2009

Pressure-induced volume-collapsed tetragonal phase of ${CaFe}_{2} {As}_{2}$ as seen via neutron scattering
journal, November 2008

Stabilization of an ambient-pressure collapsed tetragonal phase in CaFe $_{2}$ As $_{2}$ and tuning of the orthorhombic-antiferromagnetic transition temperature by over 70 K via control of nanoscale precipitates
journal, April 2011

Control of magnetic, nonmagnetic, and superconducting states in annealed Ca(Fe $_{1 - x}$ Co $_{x}$ ) $_{2}$ As $_{2}$
journal, June 2012

Structural collapse and superconductivity in rare-earth-doped CaFe $_{2}$ As $_{2}$
journal, January 2012

Superconducting and normal-state properties of $A$ Pd $_{2}$ As $_{2}$ ( $A$ = Ca, Sr, Ba) single crystals
journal, June 2013

To What Extent Iron-Pnictide New Superconductors Have Been Clarified: A Progress Report
journal, June 2009

Review of nuclear magnetic resonance studies on iron-based superconductors
journal, August 2013

Vortex contribution to specific heat of dirty d-wave superconductors: Breakdown of scaling
journal, February 1998

Quasiparticle excitation in and around the vortex core of underdoped ${YBa}_{2} {Cu}_{4} O_{8}$ studied by site-selective NMR
journal, January 2002

Suppression of electron correlations in the collapsed tetragonal phase of $Ca {Fe}_{2} {As}_{2}$ under ambient pressure demonstrated by ${}^{75}{As}$ NMR/NQR measurements
journal, March 2014

Quenched Fe moment in the collapsed tetragonal phase of Ca _{1− x} Pr _x Fe ₂ As ₂
journal, May 2013

Pressure-induced unconventional superconductivity near a quantum critical point in CaFe ₂ As ₂
journal, April 2010

The Effect of Electron-Electron Interaction on the Nuclear Spin Relaxation in Metals
journal, April 1963

Effects of Electron-Electron Interactions on Nuclear Spin-Lattice Relaxation Rates and Knight Shifts in Alkali and Noble Metals
journal, November 1968

⁷⁵ As NQR and NMR Studies of Superconductivity and Electron Correlations in Iron Arsenide LiFeAs
journal, August 2010

Antiferromagnetism of SrFe ₂ As ₂ Studied by Single-Crystal ⁷⁵ As-NMR
journal, June 2009

Stripe antiferromagnetic correlations in ${LaFeAsO}_{1 - x} F_{x}$ probed by ${}^{75}A s$ NMR
journal, June 2010

Potential Antiferromagnetic Fluctuations in Hole-Doped Iron-Pnictide Superconductor Ba _{1- x} K _x Fe ₂ As ₂ Studied by ⁷⁵ As Nuclear Magnetic Resonance Measurement
journal, May 2012

Generalized Gradient Approximation Made Simple
journal, October 1996

Comparative study of electronic structure of new superconductors (Sr, Ca)Pd2As2 and related compound BaPd2As2
journal, September 2013

Theoretical investigation of superconductivity in ${SrPd}_{2} {Ge}_{2}$ , ${SrPd}_{2} {As}_{2}$ , and ${CaPd}_{2} {As}_{2}$
journal, February 2016

Dramatic changes in the electronic structure upon transition to the collapsed tetragonal phase in CaFe $_{2}$ As $_{2}$
journal, January 2014

Theory of Nuclear Spin Relaxation in Superconductors
journal, October 1959

Experimental Evidence for a New Nuclear Spin-Lattice Relaxation Process in Type-II Superconductors at Low Temperatures
journal, August 1966

Nuclear Spin-Lattice Relaxation in Superconducting Mixed State
journal, June 1968

Nuclear Spin-Lattice Relaxation in Superconducting Mixed State
journal, February 1969

Evidence for s -Wave Superconductivity with Antiferromagnetic Fluctuations in Filled Skutterudite LaFe ₄ P ₁₂ : ¹³⁹ La and ³¹ P-NMR Studies
journal, December 2005

Nuclear magnetic resonance of $C_{60}$ and fulleride superconductors
journal, July 1996

Relaxation spin-réseau dans les alliages supraconducteurs sales en champ fort
journal, January 1966

Volovik effect on NMR measurements of unconventional superconductors
journal, March 2012

Volovik Effect in the $\pm s$ -Wave State for the Iron-Based Superconductors
journal, May 2010

Eilenberger theory for nuclear magnetic relaxation rate in superconducting vortex lattice state
journal, January 2015