A generic phase between disordered Weyl semimetal and diffusive metal

Abstract Quantum phase transitions of three-dimensional (3D) Weyl semimetals (WSMs) subject to uncorrelated on-site disorder are investigated through quantum conductance calculations and finite-size scaling of localization length. Contrary to previous claims that a direct transition from a WSM to a...

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Autores principales:	Ying Su, X. S. Wang, X. R. Wang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e80afe7e6f1a4773946cca5000ec0ae0
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spelling	oai:doaj.org-article:e80afe7e6f1a4773946cca5000ec0ae02021-12-02T11:40:58ZA generic phase between disordered Weyl semimetal and diffusive metal10.1038/s41598-017-14760-82045-2322https://doaj.org/article/e80afe7e6f1a4773946cca5000ec0ae02017-10-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-14760-8https://doaj.org/toc/2045-2322Abstract Quantum phase transitions of three-dimensional (3D) Weyl semimetals (WSMs) subject to uncorrelated on-site disorder are investigated through quantum conductance calculations and finite-size scaling of localization length. Contrary to previous claims that a direct transition from a WSM to a diffusive metal (DM) occurs, an intermediate phase of Chern insulator (CI) between the two distinct metallic phases should exist due to internode scattering that is comparable to intranode scattering. The critical exponent of localization length is ν $$\,\simeq $$ ≃ 1.3 for both the WSM-CI and CI-DM transitions, in the same universality class of 3D Gaussian unitary ensemble of the Anderson localization transition. The CI phase is confirmed by quantized nonzero Hall conductances in the bulk insulating phase established by localization length calculations. The disorder-induced various plateau-plateau transitions in both the WSM and CI phases are observed and explained by the self-consistent Born approximation. Furthermore, we clarify that the occurrence of zero density of states at Weyl nodes is not a good criterion for the disordered WSM, and there is no fundamental principle to support the hypothesis of divergence of localization length at the WSM-DM transition.Ying SuX. S. WangX. R. WangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ying Su X. S. Wang X. R. Wang A generic phase between disordered Weyl semimetal and diffusive metal
description	Abstract Quantum phase transitions of three-dimensional (3D) Weyl semimetals (WSMs) subject to uncorrelated on-site disorder are investigated through quantum conductance calculations and finite-size scaling of localization length. Contrary to previous claims that a direct transition from a WSM to a diffusive metal (DM) occurs, an intermediate phase of Chern insulator (CI) between the two distinct metallic phases should exist due to internode scattering that is comparable to intranode scattering. The critical exponent of localization length is ν $$\,\simeq $$ ≃ 1.3 for both the WSM-CI and CI-DM transitions, in the same universality class of 3D Gaussian unitary ensemble of the Anderson localization transition. The CI phase is confirmed by quantized nonzero Hall conductances in the bulk insulating phase established by localization length calculations. The disorder-induced various plateau-plateau transitions in both the WSM and CI phases are observed and explained by the self-consistent Born approximation. Furthermore, we clarify that the occurrence of zero density of states at Weyl nodes is not a good criterion for the disordered WSM, and there is no fundamental principle to support the hypothesis of divergence of localization length at the WSM-DM transition.
format	article
author	Ying Su X. S. Wang X. R. Wang
author_facet	Ying Su X. S. Wang X. R. Wang
author_sort	Ying Su
title	A generic phase between disordered Weyl semimetal and diffusive metal
title_short	A generic phase between disordered Weyl semimetal and diffusive metal
title_full	A generic phase between disordered Weyl semimetal and diffusive metal
title_fullStr	A generic phase between disordered Weyl semimetal and diffusive metal
title_full_unstemmed	A generic phase between disordered Weyl semimetal and diffusive metal
title_sort	generic phase between disordered weyl semimetal and diffusive metal
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/e80afe7e6f1a4773946cca5000ec0ae0
work_keys_str_mv	AT yingsu agenericphasebetweendisorderedweylsemimetalanddiffusivemetal AT xswang agenericphasebetweendisorderedweylsemimetalanddiffusivemetal AT xrwang agenericphasebetweendisorderedweylsemimetalanddiffusivemetal AT yingsu genericphasebetweendisorderedweylsemimetalanddiffusivemetal AT xswang genericphasebetweendisorderedweylsemimetalanddiffusivemetal AT xrwang genericphasebetweendisorderedweylsemimetalanddiffusivemetal
_version_	1718395493073027072

A generic phase between disordered Weyl semimetal and diffusive metal

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