The axial anomaly in chiral tilted Weyl semimetals

2018 ◽  
Vol 394 ◽  
pp. 1-16 ◽  
Author(s):  
Kai Zhang ◽  
Erhu Zhang ◽  
Minggang Xia ◽  
Pengfei Gao ◽  
Shengli Zhang
Keyword(s):  
Axial Anomaly ◽  
Weyl Semimetals

scholarly journals Axial anomaly generation by domain wall motion in Weyl semimetals

2020 ◽  
Vol 102 (24) ◽  
Author(s):  
Julia D. Hannukainen ◽  
Yago Ferreiros ◽  
Alberto Cortijo ◽  
Jens H. Bardarson
Keyword(s):  
Domain Wall ◽  
Wall Motion ◽  
Domain Wall Motion ◽  
Axial Anomaly ◽  
Weyl Semimetals

scholarly journals Electric manipulation of domain walls in magnetic Weyl semimetals via the axial anomaly

2021 ◽  
Vol 10 (5) ◽  
Author(s):  
Julia Hannukainen ◽  
Alberto Cortijo ◽  
Jens H Bardarson ◽  
Yago Ferreiros
Keyword(s):  
Domain Wall ◽  
Electric Field ◽  
Domain Walls ◽  
Direct Proof ◽  
Chiral Anomaly ◽  
Axial Anomaly ◽  
Domain Wall Dynamics ◽  
Weyl Semimetal ◽  
Electric And Magnetic Fields ◽  
Weyl Semimetals

We show how the axial (chiral) anomaly induces a spin torque on the magnetization in magnetic Weyl semimetals. The anomaly produces an imbalance in left- and right-handed chirality carriers when non-orthogonal electric and magnetic fields are applied. Such imbalance generates a spin density which exerts a torque on the magnetization, the strength of which can be controlled by the intensity of the applied electric field. We show how this results in an electric control of the chirality of domain walls, as well as in an improvement of the domain wall dynamics, by delaying the onset of the Walker breakdown. The measurement of the electric field mediated changes in the domain wall chirality would constitute a direct proof of the axial anomaly. Additionally, we show how quantum fluctuations of electronic Fermi arc states bound to the domain wall naturally induce an effective magnetic anisotropy, allowing for high domain wall velocities even if the intrinsic anisotropy of the magnetic Weyl semimetal is small.

scholarly journals Detect axial gauge fields with a calorimeter

2020 ◽  
Vol 3 (2) ◽  
Author(s):  
matteo Baggioli ◽  
Maxim N. Chernodub ◽  
Karl Landsteiner ◽  
Maria Vozmediano
Keyword(s):  
Specific Heat ◽  
Sound Wave ◽  
Experimental Verification ◽  
Density Wave ◽  
Gauge Fields ◽  
Axial Anomaly ◽  
Torsional Strain ◽  
Weyl Semimetal ◽  
Linear Behavior ◽  
Weyl Semimetals

Torsional strain in Weyl semimetals excites a unidirectional chiral density wave propagating in the direction of the torsional vector. This gapless excitation, named the chiral sound wave, is generated by a particular realization of the axial anomaly via the triple-axial (AAA) anomalous diagram. We show that the presence of the torsion-generated chiral sound leads to a linear behavior of the specific heat of a Weyl semimetal and to an enhancement of the thermal conductivty at experimentally accessible temperatures. We also demonstrate that such an elastic twist lowers the temperature of the sample, thus generating a new, anomalous type of elasto-calorific effect. Measurements of these thermodynamical effects will provide experimental verification of the exotic triple-axial anomaly as well as the reality of the elastic pseudomagnetic fields in Weyl semimetals.

scholarly journals Optoelectronic response of the type-I Weyl semimetals TaAs and NbAs from first principles

2020 ◽  
Vol 2 (1) ◽  
Author(s):  
Christina A. C. Garcia ◽  
Jennifer Coulter ◽  
Prineha Narang
Keyword(s):  
First Principles ◽  
Type I ◽  
Weyl Semimetals

scholarly journals Chiral sound waves in strained Weyl semimetals

2019 ◽  
Vol 1 (3) ◽  
Author(s):  
M. N. Chernodub ◽  
María A. H. Vozmediano
Keyword(s):  
Sound Waves ◽  
Weyl Semimetals

scholarly journals Type-III Weyl semimetals: (TaSe4)2I

2021 ◽  
Vol 103 (8) ◽  
Author(s):  
Xiao-Ping Li ◽  
Ke Deng ◽  
Botao Fu ◽  
YongKai Li ◽  
Da-Shuai Ma ◽  
...  
Keyword(s):  
Type Iii ◽  
Weyl Semimetals
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