Type-II <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>t</mml:mi><mml:mtext>−</mml:mtext><mml:mi>J</mml:mi></mml:mrow></mml:math> model in superconducting nickelate <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Nd</mml:mi><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi>Sr</mml:mi><mml:mi>x</mml:mi></mml:msub><mml:msub><mml:mi>NiO</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>
Ya-Hui Zhang, Ashvin Vishwanath
Abstract
This article presents a new type of t-J model for the recently observed superconducting nickelate. In contrast to the conventional t-J model, the doped hole in the new model is spin one because of a large Hund's coupling. The authors develop a three-fermion parton theory to analyze this and observe both d-wave superconductor and a fractional Fermi liquid phases
Topics & Concepts
Type (biology)PhysicsCondensed matter physicsGeologyPaleontologyPhysics of Superconductivity and MagnetismAdvanced Condensed Matter PhysicsSuperconducting Materials and Applications