Supercondutivity at 9K in Mo5PB2 with evidence for multiple gaps

McGuire, Michael A.; Parker, David S.

doi:10.1103/PhysRevB.93.064507

Title: Supercondutivity at 9K in Mo₅PB₂ with evidence for multiple gaps

Abstract

Superconductivity is observed with critical temperatures near 9 K in the tetragonal compound Mo₅PB₂. This material adopts the Cr₅B₃ structure type common to superconducting Nb₅Si_3–xBx, Mo₅SiB₂, and W₅SiB₂, which have critical temperatures of 5.8–7.8 K. We have synthesized polycrystalline samples of the compound, made measurements of electrical resistivity, magnetic susceptibility, and heat capacity, and performed first-principles electronic structure calculations. The highest T_c value (9.2 K) occurs in slightly phosphorus rich samples, with composition near Mo₅P_1.1B_1.9, and the upper critical field H_c2 at T = 0 is estimated to be ≈17 kOe. Together, the measurements and band-structure calculations indicate intermediate coupling (λ=1.0), phonon mediated superconductivity. Here, the temperature dependence of the heat capacity and upper critical field H_c2 below T_c suggest multiple superconducting gaps may be present.

Authors:

McGuire, Michael A. ^[1]; Parker, David S. ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Publication Date:: Tue Feb 09 00:00:00 EST 2016

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1244199

Alternate Identifier(s):: OSTI ID: 1237519

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review B

Additional Journal Information:: Journal Volume: 93; Journal Issue: 6; Journal ID: ISSN 2469-9950

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats


                    McGuire, Michael A., and Parker, David S. Supercondutivity at 9K in Mo5PB2 with evidence for multiple gaps.  United States: N. p., 2016. 
Web.  doi:10.1103/PhysRevB.93.064507.

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                    McGuire, Michael A., & Parker, David S. Supercondutivity at 9K in Mo5PB2 with evidence for multiple gaps.  United States.  https://doi.org/10.1103/PhysRevB.93.064507

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                    McGuire, Michael A., and Parker, David S. Tue .  
"Supercondutivity at 9K in Mo5PB2 with evidence for multiple gaps".  United States.  https://doi.org/10.1103/PhysRevB.93.064507.  https://www.osti.gov/servlets/purl/1244199.

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@article{osti_1244199,

  title        = {Supercondutivity at 9K in Mo5PB2 with evidence for multiple gaps},

  author       = {McGuire, Michael A. and Parker, David S.},

  abstractNote = {Superconductivity is observed with critical temperatures near 9 K in the tetragonal compound Mo5PB2. This material adopts the Cr5B3 structure type common to superconducting Nb5Si3–xBx, Mo5SiB2, and W5SiB2, which have critical temperatures of 5.8–7.8 K. We have synthesized polycrystalline samples of the compound, made measurements of electrical resistivity, magnetic susceptibility, and heat capacity, and performed first-principles electronic structure calculations. The highest Tc value (9.2 K) occurs in slightly phosphorus rich samples, with composition near Mo5P1.1B1.9, and the upper critical field Hc2 at T = 0 is estimated to be ≈17 kOe. Together, the measurements and band-structure calculations indicate intermediate coupling (λ=1.0), phonon mediated superconductivity. Here, the temperature dependence of the heat capacity and upper critical field Hc2 below Tc suggest multiple superconducting gaps may be present.},

  doi          = {10.1103/PhysRevB.93.064507},

  journal      = {Physical Review B},

  number       = 6,

  volume       = 93,

  place        = {United States},

  year         = {Tue Feb 09 00:00:00 EST 2016},

  month        = {Tue Feb 09 00:00:00 EST 2016}

}

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Works referencing / citing this record:

Tunneling-Spectroscopy Evidence for Two-Gap Superconductivity in a Binary Mo-Re Alloy
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Tarenkov, Vladimir; Dyachenko, Alexander; Krivoruchko, Vladimir
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Wu, Jifeng; Liu, Bin; Cui, Yanwei
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Title: Supercondutivity at 9K in Mo5PB2 with evidence for multiple gaps

Abstract

Citation Formats

Magnetic characterization of Mn5SiB2 and Mn5Si3 phases journal, September 2009

MAGNETIC PROPERTIES OF Fe 5 SiB 2 AND RELATED COMPOUNDS journal, December 1976

Magnetic and structural properties of ferromagnetic Fe 5 PB 2 and Fe 5 SiB 2 and effects of Co and Mn substitutions journal, October 2015

A study of the physical properties of single crystalline Fe5B2P journal, March 2016

Superconductivity in Mo5SiB2 journal, October 2011

Superconductivity in W 5 SiB 2 with the T 2 Phase Structure journal, February 2011

Borocarbide superconductors: Materials and physical properties journal, July 1997

Superconductivity at 39 K in magnesium diboride journal, March 2001

The delicate electronic and magnetic structure of the LaFePnO system (Pn = pnicogen) journal, February 2009

Electronic structure, electron–phonon coupling, and multiband effects in MgB2 journal, March 2003

Mechanical properties of Mo5SiB2 single crystals journal, June 2002

Growth of single crystals from metallic fluxes journal, June 1992

The Metal Flux: A Preparative Tool for the Exploration of Intermetallic Compounds journal, November 2005

A dual-slope method for specific heat measurements journal, October 1986

Generalized Gradient Approximation Made Simple journal, October 1996

Superconductivity in the new Nb5Si3−xBx phase journal, March 2009

Mössbauer and X-ray studies of Fe5PB2 journal, February 1975

The crystal structure and thermal expansion of Mo5SiB2 journal, March 2001

Substitution effect on the superconductivity in W 5− x Ta x SiB 2 with the T 2 phase structure journal, December 2012

Electrical and thermal properties of single crystalline Mo 5 X 3 (X=Si, B, C) and related transition metal 5-3 silicides journal, April 2004

Saturation of the High-Temperature Normal-State Electrical Resistivity of Superconductors journal, May 1976

Ioffe-Regel criterion and resistivity of metals journal, December 1981

Magnetoresistivity and H c 2 ( T ) in MgB 2 journal, May 2001

Two-band superconductivity in LaFeAsO0.89F0.11 at very high magnetic fields journal, May 2008

Upper Critical Field Peculiarities of Superconducting YNi 2 B 2 C and LuNi 2 B 2 C journal, February 1998

Pressure Induced Effects on the Fermi Surface of Superconducting 2 H − NbSe 2 journal, September 2005

Pressure dependence of superconducting critical temperature and upper critical field of 2 H -NbS 2 journal, April 2013

Multiband Superconductivity of Heavy Electrons in a TlNi 2 Se 2 Single Crystal journal, November 2013

Superconducting Compounds journal, March 1954

Superconducting phosphides of the transition metals journal, December 1965

Superconductivity of binary and ternary molybdenum phosphides prepared at high pressure journal, September 2001

Uniform susceptibilities of metallic elements journal, July 1977

Properties of boson-exchange superconductors journal, October 1990

Evidence for a Nodal-Line Superconducting State in LaFePO journal, April 2009

Evidence for a Nodal Energy Gap in the Iron-Pnictide Superconductor LaFePO from Penetration Depth Measurements by Scanning SQUID Susceptometry journal, September 2009

d -wave superconductor as a model of high- T c superconductors journal, January 1994

Beyond Eliashberg Superconductivity in MgB 2 : Anharmonicity, Two-Phonon Scattering, and Multiple Gaps journal, August 2001

Specific Heat of Mg 11 B 2 : Evidence for a Second Energy Gap journal, July 2001

Thermodynamic properties of superconducting niobium journal, July 1980

Tunneling-Spectroscopy Evidence for Two-Gap Superconductivity in a Binary Mo-Re Alloy journal, December 2019

Superconductivity and phase diagram in a transition metal doped Zr 5 Ge 3 compound journal, June 2018

Type-II superconductivity in W 5 Si 3 -type Nb 5 Sn 2 Al journal, March 2019

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Title: Supercondutivity at 9K in Mo₅PB₂ with evidence for multiple gaps

Magnetic characterization of Mn5SiB2 and Mn5Si3 phases
journal, September 2009

MAGNETIC PROPERTIES OF Fe ₅ SiB ₂ AND RELATED COMPOUNDS
journal, December 1976

Magnetic and structural properties of ferromagnetic Fe ₅ PB ₂ and Fe ₅ SiB ₂ and effects of Co and Mn substitutions
journal, October 2015

A study of the physical properties of single crystalline Fe5B2P
journal, March 2016

Superconductivity in Mo5SiB2
journal, October 2011

Superconductivity in W ₅ SiB ₂ with the T ₂ Phase Structure
journal, February 2011

Borocarbide superconductors: Materials and physical properties
journal, July 1997

Superconductivity at 39 K in magnesium diboride
journal, March 2001

The delicate electronic and magnetic structure of the LaFePnO system (Pn = pnicogen)
journal, February 2009

Electronic structure, electron–phonon coupling, and multiband effects in MgB2
journal, March 2003

Mechanical properties of Mo5SiB2 single crystals
journal, June 2002

Growth of single crystals from metallic fluxes
journal, June 1992

The Metal Flux: A Preparative Tool for the Exploration of Intermetallic Compounds
journal, November 2005

A dual-slope method for specific heat measurements
journal, October 1986

Generalized Gradient Approximation Made Simple
journal, October 1996

Superconductivity in the new Nb5Si3−xBx phase
journal, March 2009

Mössbauer and X-ray studies of Fe5PB2
journal, February 1975

The crystal structure and thermal expansion of Mo5SiB2
journal, March 2001

Substitution effect on the superconductivity in W _{5− x} Ta _x SiB ₂ with the T ₂ phase structure
journal, December 2012

Electrical and thermal properties of single crystalline Mo 5 X 3 (X=Si, B, C) and related transition metal 5-3 silicides
journal, April 2004

Saturation of the High-Temperature Normal-State Electrical Resistivity of Superconductors
journal, May 1976

Ioffe-Regel criterion and resistivity of metals
journal, December 1981

Magnetoresistivity and $H_{c 2} (T)$ in ${MgB}_{2}$
journal, May 2001

Two-band superconductivity in LaFeAsO0.89F0.11 at very high magnetic fields
journal, May 2008

Upper Critical Field Peculiarities of Superconducting ${YNi}_{2} B_{2} C$ and ${LuNi}_{2} B_{2} C$
journal, February 1998

Pressure Induced Effects on the Fermi Surface of Superconducting $2 H − {NbSe}_{2}$
journal, September 2005

Pressure dependence of superconducting critical temperature and upper critical field of 2 $H$ -NbS $_{2}$
journal, April 2013

Multiband Superconductivity of Heavy Electrons in a ${TlNi}_{2} {Se}_{2}$ Single Crystal
journal, November 2013

Superconducting Compounds
journal, March 1954

Superconducting phosphides of the transition metals
journal, December 1965

Superconductivity of binary and ternary molybdenum phosphides prepared at high pressure
journal, September 2001

Uniform susceptibilities of metallic elements
journal, July 1977

Properties of boson-exchange superconductors
journal, October 1990

Evidence for a Nodal-Line Superconducting State in LaFePO
journal, April 2009

Evidence for a Nodal Energy Gap in the Iron-Pnictide Superconductor LaFePO from Penetration Depth Measurements by Scanning SQUID Susceptometry
journal, September 2009

d -wave superconductor as a model of high- $T_{c}$ superconductors
journal, January 1994

Beyond Eliashberg Superconductivity in ${MgB}_{2}$ : Anharmonicity, Two-Phonon Scattering, and Multiple Gaps
journal, August 2001

Specific Heat of ${Mg}^{11} B_{2}$ : Evidence for a Second Energy Gap
journal, July 2001

Thermodynamic properties of superconducting niobium
journal, July 1980

Tunneling-Spectroscopy Evidence for Two-Gap Superconductivity in a Binary Mo-Re Alloy
journal, December 2019

Superconductivity and phase diagram in a transition metal doped Zr ₅ Ge ₃ compound
journal, June 2018

Type-II superconductivity in W ₅ Si ₃ -type Nb ₅ Sn ₂ Al
journal, March 2019

Type-II superconductivity in W5Si3-type Nb5Sn2Al
text, January 2018