scholarly journals Modeling multiorbital effects in Sr2IrO4 under strain and a Zeeman field

2021 ◽  
Vol 103 (15) ◽  
Author(s):  
Lena Engström ◽  
T. Pereg-Barnea ◽  
William Witczak-Krempa
Keyword(s):  
Zeeman Field

scholarly journals Chiral skyrmions in the plane

2014 ◽  
Vol 470 (2172) ◽  
pp. 20140394 ◽  
Author(s):  
Christof Melcher
Keyword(s):  
Nuclear Physics ◽  
Topological Charge ◽  
Energy Contribution ◽  
Promising Candidate ◽  
Linear Gradient ◽  
Topological Solitons ◽  
Zeeman Field ◽  
Continuum Theories ◽  
Least Energy ◽  
Moriya Interaction

Magnets without inversion symmetry are a prime example of a solid-state system featuring topological solitons on the nanoscale, and a promising candidate for novel spintronic applications. Magnetic chiral skyrmions are localized vortex-like structures, which are stabilized by antisymmetric exchange interaction, the so-called Dzyaloshinskii–Moriya interaction. In continuum theories, the corresponding energy contribution is, in contrast to the classical Skyrme mechanism from nuclear physics, of linear gradient dependence and breaks the chiral symmetry. In the simplest possible case of a ferromagnetic energy in the plane, including symmetric and antisymmetric exchange and Zeeman interaction, we show that the least energy in a class of fields with unit topological charge is attained provided the Zeeman field is sufficiently large.

scholarly journals Finite-momentum condensate brought on by a Zeeman field

2020 ◽  
Vol 102 (6) ◽  
Author(s):  
Stephen Keeling ◽  
Predrag Nikolić
Keyword(s):  
Zeeman Field

Topological phases of a three-dimensional topological insulator with structure inversion asymmetry

2015 ◽  
Vol 29 (06) ◽  
pp. 1550034 ◽  
Author(s):  
Xiaoyong Guo ◽  
Zaijun Wang ◽  
Qiang Zheng ◽  
Jie Peng
Keyword(s):  
Phase Diagram ◽  
Topological Insulator ◽  
Tight Binding ◽  
Three Dimensional ◽  
Surface States ◽  
Topological Phases ◽  
Zeeman Field ◽  
Surface Modes ◽  
Inversion Asymmetry ◽  
Structure Inversion

We investigate the topological phases of a three-dimensional (3D) topological insulator (TI) without the top–bottom inversion symmetry. We calculate the momentum depended spin Chern number to extract the phase diagram. Various phases are found and we address the dependence of phase boundaries on the strength of inversion asymmetry. Opposite to the quasi-two-dimensional thin film TI, in our 3D system the TI state is stabilized by the structure inversion asymmetry (SIA). With a strong SIA the 3D TI phase can exist even under a large Zeeman field. In a tight-binding form, the surface modes are discussed to confirm with the phase diagram. Particularly we find that the SIA cannot destroy the surface states but open a gap on its spectrum.

scholarly journals Effects of Zeeman field on a spin Bose-metal phase

2010 ◽  
Vol 82 (12) ◽  
Author(s):  
Hsin-Hua Lai ◽  
Olexei I. Motrunich
Keyword(s):  
Metal Phase ◽  
Zeeman Field

scholarly journals Topological metals and finite-momentum superconductors

2021 ◽  
Vol 118 (3) ◽  
pp. e2019063118
Author(s):  
Noah F. Q. Yuan ◽  
Liang Fu
Keyword(s):  
Cooper Pair ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Two Dimensional ◽  
Discontinuous Change ◽  
Zeeman Field ◽  
First Order ◽  
First Order Phase Transition ◽  
First Order Phase ◽  
2D Superconductors

We show that the Zeeman field can induce a topological transition in two-dimensional spin–orbit-coupled metals and, concomitantly, a first-order phase transition in the superconducting state involving a discontinuous change of Cooper pair momentum. Depending on the spin–orbit coupling strength, we find different phase diagrams of two-dimensional (2D) superconductors under in-plane magnetic field.

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