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We discuss the type of pairing in the hexagonal pnictide superconductor SrPtAs, taking into account its multiband structure. The topological chiral $d$-wave state with time-reversal-symmetry breaking has been anticipated from the…

Superconductivity · Physics 2019-04-24 Hikaru Ueki , Ryota Tamura , Jun Goryo

We find a mixed chirality $d$-wave superconducting state in the coexistence region between antiferromagnetism and interaction-driven superconductivity in lightly doped honeycomb materials. This state has a topological chiral $d+id$-wave…

Superconductivity · Physics 2015-11-04 A. M. Black-Schaffer , K. Le Hur

This brief review recalls some chapters in theory of sliding incommensurate density waves which may have appeared after inspirations from studies of I.E Dzyaloshinskii and collaborations with him. First we address the spin density waves…

Strongly Correlated Electrons · Physics 2021-06-16 Serguei Brazovskii , Natasha Kirova

The realization and detection of topological phases with ultracold atomic gases is at the frontier of current theoretical and experimental research. Here, we identify cold atoms in optical ladders subjected to synthetic magnetic fields as…

Quantum Gases · Physics 2015-06-16 Dario Hügel , Belén Paredes

Chiral $d$-wave superconductivity has been proposed in a number of different materials, but characteristic experimental fingerprints have been largely lacking. We show that quadruply quantized coreless vortices are prone to form and offer…

Superconductivity · Physics 2023-10-09 Patric Holmvall , Annica M. Black-Schaffer

The breaking of time reversal symmetry via the spontaneous formation of chiral order is ubiquitous in nature. Here, we present an unambiguous demonstration of this phenomenon for atoms Bose-Einstein condensed in the second Bloch band of an…

Quantum Gases · Physics 2015-03-23 T. Kock , M. Ölschläger , A. Ewerbeck , W. -M. Huang , L. Mathey , A. Hemmerich

We construct top down models for holographic d-wave superfluids in which the order parameter is a charged spin two field in the bulk. Close to the transition temperature the condensed phase can be captured by a charged spin two field in an…

High Energy Physics - Theory · Physics 2015-06-15 Keun-Young Kim , Marika Taylor

P-wave interaction in cold atoms may give rise to exotic topological superfluids. However, the realization of p-wave interaction in cold atom system is experimentally challenging. Here we propose a simple scheme to synthesize effective…

Quantum Gases · Physics 2016-03-31 Bin Wang , Zhen Zheng , Han Pu , Xubo Zou , Guangcan Guo

We show that recently suggested subwavelength lattices offer remarkable prospects for the observation of novel superfluids of fermionic polar molecules. It becomes realistic to obtain a topological $p$-wave superfluid of microwave-dressed…

Quantum Gases · Physics 2016-07-12 A. K. Fedorov , S. I. Matveenko , V. I. Yudson , G. V. Shlyapnikov

Ultrathin metallic ferromagnets on substrates with strong spin-orbit coupling can exhibit induced chiral interactions of the Dzyaloshinskii-Moriya (DM) form. For systems with perpendicular anisotropy, the presence of DM interactions has…

Materials Science · Physics 2014-06-17 Felipe Garcia-Sanchez , Pablo Borys , Arne Vansteenkiste , Joo-Von Kim , Robert L. Stamps

We present a simple scheme for implementing a one-dimensional (1D) magnetic-flux lattice of ultracold fermionic spin-$1/2$ atoms. The resulting tight-binding model supports gapped and gapless topological phases, and chiral currents for…

Quantum Gases · Physics 2017-11-02 Y. Deng , R. Lü , L. You

In this work, we discuss the emergence of $p$-wave superfluids of identical fermions in 2D lattices. The optical lattice potential manifests itself in an interplay between an increase in the density of states on the Fermi surface and the…

Quantum Gases · Physics 2018-03-07 A. K. Fedorov , V. I. Yudson , G. V. Shlyapnikov

We develop a theory for interacting fermions in the presence of spin-orbit coupling and Zeeman fields, and show that many new superfluids phases, which are topological in nature, emerge. Depending on values of spin-orbit coupling, Zeeman…

Quantum Gases · Physics 2011-10-31 Kangjun Seo , Li Han , C. A. R. Sá de Melo

We present a bosonic model, in which two bosons may form a bound pair with d-wave symmetry via the four-site ring exchange interaction. A d-wave pairing superfluid as well as a d-wave density wave (DDW) state, are proposed to be achievable…

Quantum Gases · Physics 2011-03-22 Zi Cai , Lei Wang , Jian Li , Shu Chen , X. C. Xie , Yupeng Wang

We show that the intrinsic chiral $d_{x^2-y^2} \pm id_{xy}$-wave superconducting pairing in doped graphene is significantly strengthened in the core region of a doubly quantized s-wave superconducting vortex produced in a…

Superconductivity · Physics 2013-09-11 Annica M. Black-Schaffer

We investigate the structure and physical properties of the undoped bilayer silicene through first-principles calculations and find the system is intrinsically metallic with sizable pocket Fermi surfaces. When realistic electron-electron…

Superconductivity · Physics 2013-08-13 Feng Liu , Cheng-Cheng Liu , Kehui Wu , Fan Yang , Yugui Yao

We investigate a mechanism to produce superconductivity by strong purely repulsive interactions for flat dispersion $\varepsilon \sim k^4$, without using pairing instability in Fermi-liquid. The resulting superconductors break both…

Strongly Correlated Electrons · Physics 2025-01-24 Minho Kim , Abigail Timmel , Long Ju , Xiao-Gang Wen

We study the interplay between large-spin, spin-orbit coupling, and superfluidity for bosons in a two dimensional optical lattice, focusing on the spin-1 spin-orbit coupled system recently realized at the Joint Quantum Institute [Campbell…

Quantum Gases · Physics 2016-02-10 J. H. Pixley , Stefan S. Natu , I. B. Spielman , S. Das Sarma

The two-dimensional spin-imbalanced Fermi gas subject to s-wave pairing and spin-orbit coupling is considered a promising platform for realizing a topological chiral-p-wave superfluid. In the BCS limit of s-wave pairing, i.e., when Cooper…

Quantum Gases · Physics 2022-11-18 K. Thompson , U. Zülicke , J. Brand

Singlet pairing in a Fermi superfluid is frustrated when the amounts of fermions of each pairing partner are unequal. The resulting `imbalanced superfluid' has been realized experimentally for ultracold atomic gases with s-wave…

Superconductivity · Physics 2008-07-28 J. Tempere , S. N. Klimin , J. T. Devreese , V. V. Moshchalkov