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

Title: Fulde-Ferrell-Larkin-Ovchinnikov pairing induced by a Weyl nodal line in an Ising superconductor with a high critical field

Journal Article · · Physical Review. B
 [1]; ORCiD logo [2]
  1. Ocean University of China, Shandong (China)
  2. Univ. of Utah, Salt Lake City, UT (United States)

Superconductivity and electron topology are two quantum phenomena that have attracted much interest, but no causal relationship between them has been reported because superconductivity is a many-body effect due to electron-electron interaction, while electron topology is a single-particle manifestation of electron states. In this work, we demonstrate that electron topology can induce Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) pairing in Ising Bardeen-Cooper-Schrieffer (IBCS) superconductors. Specifically, we predict that the nonmagnetic metals of the MA2Z4 family, including α1-TaSi2P4, α1-TaSi2N4, α2-TaGe2P4, α1-NbSi2P4, and α2-NbGe2P4 monolayers, are all IBCS superconductors with a transition temperature ranging from a few to tens of degrees Kelvin. The intrinsic IBCS pairing alone will enhance the in-plane critical field Bc to ~20–60 times the Pauli limit Bp, and the extrinsic FFLO pairing evoked by topological Weyl nodal lines under a magnetic field can further double the Bc/Bp ratio. Our findings not only enrich the fundamental relationship between superconductivity and electron topology, but they also yield an effective approach to enhance the robustness of superconductivity.

Research Organization:
Univ. of Utah, Salt Lake City, UT (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Natural Science Foundation of China (NSFC); Natural Science Foundation of Shandong Province
Grant/Contract Number:
FG02-04ER46148; 12004357; ZR2020QA053
OSTI ID:
1905831
Journal Information:
Physical Review. B, Vol. 105, Issue 2; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (72)

Generalized Gradient Approximation Made Simple journal October 1996
FFLO States in Layered Organic Superconductors journal November 2017
Enhanced superconductivity upon weakening of charge density wave transport in 2 H -TaS 2 in the two-dimensional limit journal July 2018
Topological superconductivity in a van der Waals heterostructure journal December 2020
Hidden physical effects in noncentrosymmetric crystals journal October 2020
Efficient Ohmic contacts and built-in atomic sublayer protection in MoSi2N4 and WSi2N4 monolayers journal August 2021
Type-II Ising Superconductivity and Anomalous Metallic State in Macro-Size Ambient-Stable Ultrathin Crystalline Films journal June 2020
Full superconducting dome of strong Ising protection in gated monolayer WS 2 journal March 2018
An updated version of wannier90: A tool for obtaining maximally-localised Wannier functions journal August 2014
Exact Numerical Study of Pair Formation with Imbalanced Fermion Populations journal March 2008
Exceptional piezoelectricity, high thermal conductivity and stiffness and promising photocatalysis in two-dimensional MoSi2N4 family confirmed by first-principles journal April 2021
QUANTUM ESPRESSO: a modular and open-source software project for quantum simulations of materials journal September 2009
Chemical vapor deposition of layered two-dimensional MoSi 2 N 4 materials journal August 2020
Magnetic field driven nodal topological superconductivity in monolayer transition metal dichalcogenides journal July 2018
From ultrasoft pseudopotentials to the projector augmented-wave method journal January 1999
Topological superconducting phase in high-Tc superconductor MgB2 with Dirac–nodal-line fermions journal May 2019
Bardeen-Cooper-Schrieffer Theory of Superconductivity in the Case of Overlapping Bands journal December 1959
Nearly quantized conductance plateau of vortex zero mode in an iron-based superconductor journal December 2019
Enhancement of the upper critical field by nonmagnetic impurities in dirty two-gap superconductors journal May 2003
MoSi2N4 single-layer: a novel two-dimensional material with outstanding mechanical, thermal, electronic and optical properties journal February 2021
Ising Superconductivity and Quantum Phase Transition in Macro-Size Monolayer NbSe 2 journal October 2017
Type-II Ising Superconductivity in Two-Dimensional Materials with Spin-Orbit Coupling journal September 2019
Experimental Detection of a Majorana Mode in the core of a Magnetic Vortex inside a Topological Insulator-Superconductor Bi 2 Te 3 / NbSe 2 Heterostructure journal January 2015
A Unified View of Topological Phase Transition in Band Theory journal May 2020
Predicting Phonon Properties from Equilibrium Molecular Dynamics Simulations journal January 2014
Discovery of 2D van der Waals layered MoSi2N4 family journal August 2020
On the influence of a uniform exchange field acting on the spins of the conduction electrons in a superconductor journal August 1963
A unified formulation of the constant temperature molecular dynamics methods journal July 1984
Fulde–Ferrell–Larkin–Ovchinnikov State in Heavy Fermion Superconductors journal May 2007
DynaPhoPy: A code for extracting phonon quasiparticles from molecular dynamics simulations journal December 2017
Type-II Ising pairing in few-layer stanene journal March 2020
Superconductivity protected by spin–valley locking in ion-gated MoS2 journal December 2015
The discovery of superconductivity journal September 2010
Interface-Induced Zeeman-Protected Superconductivity in Ultrathin Crystalline Lead Films journal April 2018
Transition temperature of strong-coupled superconductors reanalyzed journal August 1975
Topological edge states in a high-temperature superconductor FeSe/SrTiO3(001) film journal July 2016
Prediction of intrinsic topological superconductivity in Mn-doped GeTe monolayer from first-principles journal March 2021
Fulde-Ferrell state in quasi-two-dimensional superconductors journal November 1994
Valley-dependent properties of monolayer MoSi2N4, WSi2N4 , and MoSi2As4 journal December 2020
Superconducting doped topological materials journal July 2015
Evidence for two-dimensional Ising superconductivity in gated MoS2 journal November 2015
Quantized Hall Conductance in a Two-Dimensional Periodic Potential journal August 1982
Phonons and related crystal properties from density-functional perturbation theory journal July 2001
Heavy-fermion systems journal October 1984
First-Principles Calculations on the Effect of Doping and Biaxial Tensile Strain on Electron-Phonon Coupling in Graphene journal November 2013
Microscopic theory of in-plane critical field in two-dimensional Ising superconducting systems journal November 2020
Ising pairing in superconducting NbSe2 atomic layers journal November 2015
Theory of Superconductivity journal December 1957
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
First principles phonon calculations in materials science journal November 2015
Interior Gap Superfluidity journal January 2003
Valley pseudospin in monolayer Mo Si 2 N 4 and Mo Si 2 As 4 journal January 2021
Clean 2D superconductivity in a bulk van der Waals superlattice journal October 2020
Prediction of topological superconductivity from type-IV, -III, -II, and -I′ nodal points induced by Rashba spin-orbit coupling journal December 2021
Amperean Pairing and the Pseudogap Phase of Cuprate Superconductors journal July 2014
Intercalated architecture of MA2Z4 family layered van der Waals materials with emerging topological, magnetic and superconducting properties journal April 2021
Non-Abelian anyons and topological quantum computation journal September 2008
Canonical dynamics: Equilibrium phase-space distributions journal March 1985
Model for a Quantum Hall Effect without Landau Levels: Condensed-Matter Realization of the "Parity Anomaly" journal October 1988
Superconductivity in a Strong Spin-Exchange Field journal August 1964
Thermal conductivity of monolayer MoS 2 , MoSe 2 , and WS 2 : interplay of mass effect, interatomic bonding and anharmonicity journal January 2016
Superconducting Proximity Effect and Majorana Fermions at the Surface of a Topological Insulator journal March 2008
Fault-tolerant quantum computation by anyons journal January 2003
Theoretical evidence of the spin–valley coupling and valley polarization in two-dimensional MoSi2X4 (X = N, P, and As) journal January 2021
Fermion pairing with spin-density imbalance in an optical lattice journal September 2006
The Fulde–Ferrell–Larkin–Ovchinnikov state for ultracold fermions in lattice and harmonic potentials: a review journal February 2018
Prediction of Majorana edge states from magnetized topological surface states journal January 2021
Dynamic stabilization of cubic Ca Si O 3 perovskite at high temperatures and pressures from ab initio molecular dynamics journal March 2014
Tuning Ising superconductivity with layer and spin–orbit coupling in two-dimensional transition-metal dichalcogenides journal April 2018
Breached Pairing Superfluidity: Possible Realization in QCD journal July 2003
Evidence for the Fulde–Ferrell–Larkin–Ovchinnikov state in bulk NbS2 journal June 2021
Transition Temperature of Strong-Coupled Superconductors journal March 1968