Heavy Fermion Superconductivity and Magnetic Order in NoncentrosymmetricCePt3Si

Abstract

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 order at T(N) approximately 2.2 K and enters into a heavy fermion superconducting state at T(c) approximately 0.75 K. Large values of H(')(c2) approximately -8.5 T/K and H(c2)(0) approximately 5 T refer to heavy quasiparticles forming Cooper pairs. Hitherto, CePt3Si is the first heavy fermion superconductor without a center of symmetry.

Complex-Stripe Phases Induced by Staggered Rashba Spin–Orbit Coupling

“…Since the discovery of the non-centrosymmetric superconductor CePt 3 Si, 1) numerous studies of non-centrosymmetric superconductivity have been conducted, both theoretically and experimentally, elucidating unusual properties. 2) Examples are the mixing of spin-singlet and triplet Cooper pairings, 3,4) magnetoelectric effect, [5][6][7][8] helical superconducting phase, 3,[9][10][11][12][13][14][15] and topological superconductivity.…”

Transverse Magnetic Field Distribution in the Vortex State of Noncentrosymmetric Superconductor with O Symmetry

“…The family of Li 2 B(Pd 1−x Pt x ) 3 as well as the compounds CePt 3 Si and CeRhSi 3 are among the major examples. 1, 2,3,4,5,6,7,8,9 The lack of inversion symmetry of background crystal causes an unconventional pairing in the superconducting state and a number of consequences are predicted. 10,11,12,13 It is commonly believed that in the normal state the Fermi surface is split by the spin-orbital coupling as a result of the broken inversion symmetry, and the pairing wavefunction is in a mixture of singlet and triplet pseudospin state.…”

Josephson effect between conventional and Rashba superconductors

“…The lack of an inversion center in the crystal lattice induces antisymmetric spin-orbit coupling, leading to important modifications of the superconducting phase. The spin-orbit coupling displays the Rashba form in systems such as CePt 3 Si [1] where mirror symmetry about a single plane is missing [2]. Due to such an antisymmetric spin-orbit coupling, the Fermi surface is split into two sheets by the spin-degeneracy lifting and the electronic spin structure on the Fermi surfaces is modified [3,4].…”