Title: Anomalous Hall effects in chiral superconductors

Journal Article · · Frontiers in Physics
ORCiD logo [1]; ORCiD logo [2]
  1. Northwestern University, Evanston, IL (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); City University of New York (CUNY), NY (United States); University of Sydney (Australia)
  2. Northwestern University, Evanston, IL (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Louisiana State University, Baton Rouge, LA (United States)

We report theoretical results for the electronic contribution to thermal and electrical transport for chiral superconductors belonging to even or odd-parity E1 and E2 representations of the tetragonal and hexagonal point groups. Chiral superconductors exhibit novel properties that depend on the topology of the order parameter and Fermi surface, and—as we highlight—the structure of the impurity potential. An anomalous thermal Hall effect is predicted and shown to be sensitive to the winding number, ν, of the chiral order parameter via Andreev scattering that transfers angular momentum from the chiral condensate to excitations that scatter off the random potential. For heat transport in a chiral superconductor with isotropic impurity scattering, i.e., point-like impurities, a transverse heat current is obtained for ν = ± 1, but vanishes for | ν | > 1. This is not a universal result. For finite-size impurities with radii of order or greater than the Fermi wavelength, R ≥ ℏ / p f, the thermal Hall conductivity is finite for chiral order with | ν | ≥ 2, and determined by a specific Fermi-surface average of the differential cross-section for electron-impurity scattering. Our results also provide quantitative formulae for analyzing and interpreting thermal transport measurements for superconductors predicted to exhibit broken time-reversal and mirror symmetries.

Research Organization:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
AC02-07CH11359
OSTI ID:
2482550
Report Number(s):
FERMILAB-PUB-19-0878-SQMS-V; arXiv:1911.06299; oai:inspirehep.net:2856188
Journal Information:
Frontiers in Physics, Journal Name: Frontiers in Physics Vol. 12; ISSN 2296-424X
Publisher:
Frontiers Research FoundationCopyright Statement
Country of Publication:
United States
Language:
English

References (73)

Thermal conductivity of superconducting UPt3 at low temperatures journal March 1996
Transformation of Gorkov's equation for type II superconductors into transport-like equations journal April 1968
Anomalous Thermal Hall Effect in Chiral Phases of $$^3$$He-Aerogel journal January 2022
Theory of dirty superconductors journal September 1959
The quasiclassical approach to superfluid 3He journal December 1983
Time-reversal symmetry-breaking superconductivity in Sr2RuO4 journal August 1998
Realignment of the flux-line lattice by a change in the symmetry of superconductivity in UPt3 journal July 2000
Chiral superconductivity from repulsive interactions in doped graphene journal January 2012
New chiral phases of superfluid 3He stabilized by anisotropic silica aerogel journal February 2012
Chiral singlet superconductivity in the weakly correlated metal LaPt3P journal May 2021
Even odder after twenty-three years: the superconducting order parameter puzzle of Sr2RuO4 journal July 2017
Broken time-reversal symmetry in the topological superconductor UPt3 journal March 2020
Constraints on the superconducting order parameter in Sr2RuO4 from oxygen-17 nuclear magnetic resonance journal September 2019
Momentum-resolved superconducting energy gaps of Sr 2 RuO 4 from quasiparticle interference imaging journal February 2020
Evidence for even parity unconventional superconductivity in Sr 2 RuO 4 journal June 2021
The order parameter for the superconducting phases of UPt 3 journal February 1994
Chiral p-wave order in Sr 2 RuO 4 journal March 2012
Low temperature thermal hall conductivity of a nodal chiral superconductor journal June 2016
Broken symmetry in an unconventional superconductor: a model for the double transition in UPt 3 journal October 1989
Topological surface states in nodal superconductors journal May 2015
Sr 2 RuO 4 : an electronic analogue of 3 He? journal November 1995
Nodal gap structure and order parameter symmetry of the unconventional superconductor UPt 3 journal February 2015
Identification of the orbital pairing symmetry in UPt 3 journal December 2000
Time-reversal invariant superconductivity of Sr 2 RuO 4 revealed by Josephson effects journal September 2019
Transport properties of anisotropic superconductors: Influence of arbitrary electron-impurity phase shifts journal May 1989
Anisotropy of the upper critical field in a heavy-fermion superconductor journal November 1993
Infrared conductivity in layeredd-wave superconductors journal October 1995
Electronic thermal conductivity and the Wiedemann-Franz law for unconventional superconductors journal June 1996
Suppression of superconductivity in UPt 3 single crystals journal July 1998
Spin quantum Hall effect in unconventional superconductors journal August 1999
Paired states of fermions in two dimensions with breaking of parity and time-reversal symmetries and the fractional quantum Hall effect journal April 2000
Identifying the pairing symmetry in the Sr 2 RuO 4 superconductor journal October 2000
Edge modes, edge currents, and gauge invariance in p x + i p y superfluids and superconductors journal May 2004
Large thermoelectric effects in unconventional superconductors journal July 2004
Upper limit on spontaneous supercurrents in Sr 2 Ru O 4 journal July 2007
Three-band superconductivity and the order parameter that breaks time-reversal symmetry journal April 2010
Limits on superconductivity-related magnetization in Sr 2 RuO 4 and PrOs 4 Sb 12 from scanning SQUID microscopy journal June 2010
Surface states, edge currents, and the angular momentum of chiral p -wave superfluids journal December 2011
Edge mass current and the role of Majorana fermions in A -phase superfluid 3 He journal March 2012
Evidence for superconductivity with broken time-reversal symmetry in locally noncentrosymmetric SrPtAs journal May 2013
Chiral phases of superfluid 3 He in an anisotropic medium journal December 2013
Chiral d -wave superconductivity in SrPtAs journal January 2014
Search for spontaneous edge currents and vortex imaging in Sr 2 Ru O 4 mesostructures journal April 2014
Anomalous transport phenomena in p x + i p y superconductors journal September 2015
Topological superconductivity in two dimensions with mixed chirality journal October 2015
Topological Weyl superconductor to diffusive thermal Hall metal crossover in the B phase of UPt 3 journal December 2015
Electron bubbles and Weyl fermions in chiral superfluid He 3 − A journal August 2016
Evidence for Complex Superconducting Order Parameter Symmetry in the Low-Temperature Phase of UPt 3 from Josephson Interferometry journal November 2009
Energy Magnetization and the Thermal Hall Effect journal November 2011
Possible Topological Superconducting Phases of MoS 2 journal August 2014
Large Chern Number and Edge Currents in Sr 2 RuO 4 journal August 2015
Impurity-Induced Anomalous Thermal Hall Effect in Chiral Superconductors journal April 2020
Thermal Anomalies of He 3 : Pairing in a Magnetic Field journal January 1973
Unusual Transport Effects in Anisotropic Superconductors journal May 1988
Identification of odd-parity superconductivity in UPt_{3} from paramagnetic effects on the upper critical field journal January 1991
Muon spin relaxation in UPt 3 journal August 1993
Models for Superfluid H 3 e in Aerogel journal March 1998
High Resolution Polar Kerr Effect Measurements of Sr 2 RuO 4 : Evidence for Broken Time-Reversal Symmetry in the Superconducting State journal October 2006
Vertical Line Nodes in the Superconducting Gap Structure of Sr 2 RuO 4 journal March 2017
The superconducting phases of UPt 3 journal March 2002
The superconductivity of Sr 2 RuO 4 and the physics of spin-triplet pairing journal May 2003
Scattering by two‐dimensional circular barrier, hard circle, and delta function ring potentials journal May 1986
The Transition Between Real and Complex Superconducting Order Parameter Phases in UPt3 journal June 2010
Phase Diagram of the Topological Superfluid 3He Confined in a Nanoscale Slab Geometry journal May 2013
Chiral Symmetry Breaking in Superfluid 3 He-A journal July 2013
Strong Increase of Tc of Sr2RuO4 Under Both Tensile and Compressive Strain journal April 2014
Observation of broken time-reversal symmetry in the heavy-fermion superconductor UPt3 journal July 2014
Splitting of Superconducting Transitions in UPt3 journal July 1989
Quasiparticle States near the Surface and the Domain Wall in a p x ± i p y -Wave Superconductor journal March 1999
Evaluation of Spin-Triplet Superconductivity in Sr 2 RuO 4 journal January 2012
Disorder Induced Anomalous Thermal Hall Effect in Chiral Phases of Superfluid 3He conference May 2023
Quantum Thermal Hall Effect in a Time-Reversal-Symmetry-Broken Topological Superconductor in Two Dimensions: Approach from Bulk Calculations journal February 2013
Quantum Thermal Hall Effect in a Time-Reversal-Symmetry-Broken Topological Superconductor in Two Dimensions: Approach from Bulk Calculations journal February 2013