Order parameter in superconductors with nondegenerate bands

  title={Order parameter in superconductors with nondegenerate bands},
  author={Ivan A. Sergienko and S H Curnoe},
  journal={Physical Review B},
In noncentrosymmetric metals, the spin degeneracy of the electronic bands is lifted by spin-orbit coupling. We consider general symmetry properties of the pairing function Delta(k) in noncentrosymmetric superconductors with spin-orbit coupling (NSC), including CePt3Si, UIr and Cd2Re2O7. We find that Delta(k) = chi(k) t(k), where chi(k) is an even function which transforms according to the irreducible representations of the crystallographic point group and t(k) is a model dependent phase factor… 
Temperature Dependence of the Spin Susceptibility in Noncentrosymmetric Superconductors with Line Nodes
The spin susceptibility of noncentrosymmetric superconductors is studied when the gap function has line nodes. As examples, d-wave states, where the gap function has an additional odd-parity phase
Effects of Magnetic and Nonmagnetic Impurities on the Transition Temperature of a Noncentrosymmetrical Superconductor: Application to CePt3Si
The combined effect of nonmagnetic and magnetic impurities on the critical temperature of a noncentrosymmetrical superconductor by considering a Cooper pairing model with a two-component order
Phenomenological theory of the s-wave state in superconductors without an inversion center
Abstract.In materials without an inversion center of symmetry the spin degeneracy of the conducting band is lifted by an antisymmetric spin orbit coupling (ASOC). Under such circumstances, spin and
Magnetic and Superconducting Phase Diagram of Noncentrosymmetric CeRhSi3
The noncentrosymmetric heavy fermion superconductor CeRhSi 3 exhibits an extremely large superconducting upper critical field B c2 for the magnetic field along the c axis. This remarkable feature is
Phase diagrams of noncentrosymmetric superconductors
Noncentrosymmetric superconductors with various types of pairing interactions are systematically examined with particular focus on phenomena that originate from the differences between Fermi surfaces
Effects of Impurities on a Noncentrosymmetric Superconductor: Application to CePt3Si
In the past two decades, a number of novel superconducting materials have been discovered where order parameter symmetries are different from an s-wave spin singlet, predicted by the
Theory of parity-violated Cooper pairs in weakly noncentrosymmetric superconductors
We propose that in noncentrosymmetric superconductors with weakly asymmetric spin-orbit interaction the field-induced pair correlation between the spin-orbit split different bands ignored in previous
Nuclear magnetic relaxation rate in a noncentrosymmetric superconductor
Noncentrosymmetric superconductors possess, in general, order parameters of mixed parity, i.e., the Cooper pairing state consists of spin-singlet and spin-triplet pairing components. We show that
Temperature dependence of the superfluid density in a noncentrosymmetric superconductor
For a noncentrosymmetric superconductor such as CePt3Si, we consider a Cooper pairing model with a two-component order parameter composed of spin-singlet and spin-triplet pairing components. We
Effects of magnetic and nonmagnetic impurities on the spin susceptibility of a noncentrosymmetrical superconductor: Application to CePt3Si
The combined effect of nonmagnetic and magnetic impurities on the spin susceptibility of a noncentrosymmetrical superconductor by considering a Cooper pairing model with a two-component order


Heavy fermion superconductivity and magnetic order in noncentrosymmetric CePt3Si.
CePt3Si is a novel heavy fermion superconductor, crystallizing in the CePt3B structure as a tetragonally distorted low symmetry variant of the AuCu3 structure type. CePt3Si exhibits antiferromagnetic
Evidence for a novel state of superconductivity in noncentrosymmetric CePt3Si: a 195Pt-NMR study.
CePt3Si is the first HF superconductor that reveals a peak in 1/T(1) just below T(c) and does not follow the T3 law that used to be reported for most unconventional HF superconductors, remarking that this unexpected SC characteristic may be related to the lack of an inversion center in its crystal structure.
p-wave superconductivity in cubic metals.
  • Ueda, Rice
  • Physics
    Physical review. B, Condensed matter
  • 1985
Group theory is used to classify p-wave superconducting states in a cubic crystal with spin-orbit coupling. All possible stable states are obtained based on the most general form of the
Phenomenological theory of unconventional superconductivity
This article is a review of recent developments in the phenomenological description of unconventional superconductivity. Starting with the BCS theory of superconductivity with anisotropic Cooper
Superconductivity in the presence of strong Pauli paramagnetism : CeCu2Si2
A comparison was made between four low-temperature properties of LaCu2Si2and CeCu2Si2. Whereas LaCu2Si2behaves like a normal metal, CeCu2Si2shows (i) low-temperature anomalies typical of “unstable 4f
Structural Order Parameter in the Pyrochlore Superconductor Cd2Re2O7
It is shown that both structural phase transitions in Cd 2 Re 2 O 7 , which occur at T s1 =200 K and T s2 =120 K, are due to an instability of the Re tetrahedral network with respect to the same
Spin susceptibility in superconductors without inversion symmetry
In materials without spatial inversion symmetry, the spin degeneracy of the conduction electrons can be lifted by an antisymmetric spin–orbit coupling. We discuss the influence of this spin–orbit
Superconducting 2D system with lifted spin degeneracy: mixed singlet-triplet state.
A theory of the superconducting state for 2D metals without inversion symmetry modeling the geometry of a surfacesuperconducting layer in a field-effect transistor or near the boundary doped by adsorbed ions is developed.
Electronic structure and electron-phonon coupling in the 18K superconductor Y2C3
The electronic structure and electron-phonon coupling in Y2C3 is investigated using density functional calculations. We find that the Fermi level falls in a manifold of mixed character derived from Y