scholarly journals Two-parameter scaling theory of the longitudinal magnetoconductivity in a Weyl metal phase: Chiral anomaly, weak disorder, and finite temperature

2016 ◽  
Vol 94 (8) ◽  
Author(s):  
Kyoung-Min Kim ◽  
Dongwoo Shin ◽  
M. Sasaki ◽  
Heon-Jung Kim ◽  
Jeehoon Kim ◽  
...  
Keyword(s):  
Finite Temperature ◽  
Scaling Theory ◽  
Metal Phase ◽  
Chiral Anomaly ◽  
Weak Disorder ◽  
Two Parameter

scholarly journals On axions and the chiral anomaly at finite temperature

2018 ◽  
Vol 175 ◽  
pp. 01010
Author(s):  
Mikko Laine
Keyword(s):  
Finite Temperature ◽  
Chiral Anomaly ◽  
Discussion Session

A brief introduction to a plenary discussion session at the Lattice’17 conference on axions and the chiral anomaly at finite temperature is provided.

Path-integral approach to anomalies at finite temperature

1990 ◽  
Vol 68 (1) ◽  
pp. 96-103 ◽  
Author(s):  
T. F. Treml
Keyword(s):  
Vector Field ◽  
Path Integral ◽  
Finite Temperature ◽  
Dimensional Regularization ◽  
Flat Space ◽  
Integral Approach ◽  
Chiral Anomaly ◽  
Conformal Anomaly ◽  
Path Integral Approach ◽  
The One

The non-Abelian chiral anomaly for a fermion interacting with an external vector field in any even dimension and the conformal anomaly, in the limit of flat space–time, for a self-interacting scalar field are shown to be independent of temperature using a simple path-integral approach that employs dimensional regularization. The chiral anomaly is used as an example to show that the methods used to study the dimensionally regularized anomaly at finite temperature are readily transferable to the case of ζ-function regularization. The conformal anomaly in (super) string theory at finite temperature is briefly discussed in the light of known results. Some subtleties concerning the use of infrared cutoffs in a dimensionally regularized approach to the computation of the one-loop effective action at finite temperature are considered in an appendix.

scholarly journals Infrared chiral anomaly at finite temperature

2011 ◽  
Vol 696 (5) ◽  
pp. 556-559 ◽  
Author(s):  
Ashok Das ◽  
J. Frenkel
Keyword(s):  
Finite Temperature ◽  
Chiral Anomaly

Chiral anomaly at finite temperature

1988 ◽  
Vol 38 (12) ◽  
pp. 3840-3842 ◽  
Author(s):  
Yu-liang Liu ◽  
Guang-jiong Ni
Keyword(s):  
Finite Temperature ◽  
Chiral Anomaly

scholarly journals Two-parameter scaling theory of transport near a spectral node

2014 ◽  
Vol 90 (17) ◽  
Author(s):  
Andreas Sinner ◽  
Klaus Ziegler
Keyword(s):  
Scaling Theory ◽  
Two Parameter

scholarly journals Evidence for trivial Berry phase and absence of chiral anomaly in semimetal NbP

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Sudesh ◽  
Pawan Kumar ◽  
Prakriti Neha ◽  
Tanmoy Das ◽  
Satyabrata Patnaik
Keyword(s):  
Fermi Surface ◽  
Particle Physics ◽  
Berry Phase ◽  
Theoretical Calculations ◽  
Charge Carrier Mobility ◽  
High Energy ◽  
Chiral Anomaly ◽  
High Energy Particle ◽  
Weak Disorder ◽  
Weyl Semimetals

Abstract The discovery of Weyl semimetals (WSM) has brought forth the condensed matter realization of Weyl fermions, which were previously theorized as low energy excitations in high energy particle physics. Recently, transition metal mono-pnictides are under intense investigation for understanding properties of inversion-symmetry broken Weyl semimetals. Non-trivial Berry phase and chirality are important markers for characterizing topological aspects of Weyl semimetals. Most recently, theoretical calculations predict strong influence of the position of Weyl nodes with respect to Fermi surface and weak disorder that can drive WSMs into chirally symmetric Dirac semimetals. Using magneto-transport measurements in single crystals of WSM NbP, we observe an exceptionally large magnetoresistance at low temperature, which is non-saturating and linear at high fields. The origin of linear transverse magnetoresistance is assigned to charge carrier mobility fluctuations. Negative longitudinal magnetoresistance is not seen, suggesting lack of well-defined chiral anomaly in NbP. Unambiguous Shubnikov-de Haas oscillations are observed at low temperatures that are correlated to a trivial Berry phase corresponding to Fermi surface extrema at 30.5 Tesla. Our results are important towards identifying topological characteristics of Weyl semimetals and their experimental manifestations in the presence of weak disorder.

Sign in / Sign up

Export Citation Format

Share Document