Heavy fermion quantum criticality at dilute carrier limit in CeNi2−δ (As1−x P x )2

Abstract We study the quantum phase transitions in the nickel pnctides, CeNi2−δ (As1−x P x )2 (δ ≈ 0.07–0.22) polycrystalline samples. This series displays the distinct heavy fermion behavior in the rarely studied parameter regime of dilute carrier limit. We systematically investigate the magnetizat...

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Autores principales:	Jian Chen, Zhen Wang, Yupeng Li, Chunmu Feng, Jianhui Dai, Zhu’an Xu, Qimiao Si
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2019
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e5194e08705f4abbb636ec04d8b25360
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spelling	oai:doaj.org-article:e5194e08705f4abbb636ec04d8b253602021-12-02T15:07:55ZHeavy fermion quantum criticality at dilute carrier limit in CeNi2−δ (As1−x P x )210.1038/s41598-019-48662-82045-2322https://doaj.org/article/e5194e08705f4abbb636ec04d8b253602019-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-019-48662-8https://doaj.org/toc/2045-2322Abstract We study the quantum phase transitions in the nickel pnctides, CeNi2−δ (As1−x P x )2 (δ ≈ 0.07–0.22) polycrystalline samples. This series displays the distinct heavy fermion behavior in the rarely studied parameter regime of dilute carrier limit. We systematically investigate the magnetization, specific heat and electrical transport down to low temperatures. Upon increasing the P-content, the antiferromagnetic order of the Ce-4f moment is suppressed continuously and vanishes at x c ~ 0.55. At this doping, the temperature dependences of the specific heat and longitudinal resistivity display non-Fermi liquid behavior. Both the residual resistivity ρ 0 and the Sommerfeld coefficient γ 0 are sharply peaked around x c . When the P-content reaches close to 100%, we observe a clear low-temperature crossover into the Fermi liquid regime. In contrast to what happens in the parent compound x = 0.0 as a function of pressure, we find a surprising result that the non-Fermi liquid behavior persists over a nonzero range of doping concentration, x c < x < 0.9. In this doping range, at the lowest measured temperatures, the temperature dependence of the specific-heat coefficient is logarithmically divergent and that of the electrical resistivity is linear. We discuss the properties of CeNi2−δ (As1−x P x )2 in comparison with those of its 1111 counterpart, CeNi(As1−x P x )O. Our results indicate a non-Fermi liquid phase in the global phase diagram of heavy fermion metals.Jian ChenZhen WangYupeng LiChunmu FengJianhui DaiZhu’an XuQimiao SiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 9, Iss 1, Pp 1-10 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jian Chen Zhen Wang Yupeng Li Chunmu Feng Jianhui Dai Zhu’an Xu Qimiao Si Heavy fermion quantum criticality at dilute carrier limit in CeNi2−δ (As1−x P x )2
description	Abstract We study the quantum phase transitions in the nickel pnctides, CeNi2−δ (As1−x P x )2 (δ ≈ 0.07–0.22) polycrystalline samples. This series displays the distinct heavy fermion behavior in the rarely studied parameter regime of dilute carrier limit. We systematically investigate the magnetization, specific heat and electrical transport down to low temperatures. Upon increasing the P-content, the antiferromagnetic order of the Ce-4f moment is suppressed continuously and vanishes at x c ~ 0.55. At this doping, the temperature dependences of the specific heat and longitudinal resistivity display non-Fermi liquid behavior. Both the residual resistivity ρ 0 and the Sommerfeld coefficient γ 0 are sharply peaked around x c . When the P-content reaches close to 100%, we observe a clear low-temperature crossover into the Fermi liquid regime. In contrast to what happens in the parent compound x = 0.0 as a function of pressure, we find a surprising result that the non-Fermi liquid behavior persists over a nonzero range of doping concentration, x c < x < 0.9. In this doping range, at the lowest measured temperatures, the temperature dependence of the specific-heat coefficient is logarithmically divergent and that of the electrical resistivity is linear. We discuss the properties of CeNi2−δ (As1−x P x )2 in comparison with those of its 1111 counterpart, CeNi(As1−x P x )O. Our results indicate a non-Fermi liquid phase in the global phase diagram of heavy fermion metals.
format	article
author	Jian Chen Zhen Wang Yupeng Li Chunmu Feng Jianhui Dai Zhu’an Xu Qimiao Si
author_facet	Jian Chen Zhen Wang Yupeng Li Chunmu Feng Jianhui Dai Zhu’an Xu Qimiao Si
author_sort	Jian Chen
title	Heavy fermion quantum criticality at dilute carrier limit in CeNi2−δ (As1−x P x )2
title_short	Heavy fermion quantum criticality at dilute carrier limit in CeNi2−δ (As1−x P x )2
title_full	Heavy fermion quantum criticality at dilute carrier limit in CeNi2−δ (As1−x P x )2
title_fullStr	Heavy fermion quantum criticality at dilute carrier limit in CeNi2−δ (As1−x P x )2
title_full_unstemmed	Heavy fermion quantum criticality at dilute carrier limit in CeNi2−δ (As1−x P x )2
title_sort	heavy fermion quantum criticality at dilute carrier limit in ceni2−δ (as1−x p x )2
publisher	Nature Portfolio
publishDate	2019
url	https://doaj.org/article/e5194e08705f4abbb636ec04d8b25360
work_keys_str_mv	AT jianchen heavyfermionquantumcriticalityatdilutecarrierlimitinceni2das1xpx2 AT zhenwang heavyfermionquantumcriticalityatdilutecarrierlimitinceni2das1xpx2 AT yupengli heavyfermionquantumcriticalityatdilutecarrierlimitinceni2das1xpx2 AT chunmufeng heavyfermionquantumcriticalityatdilutecarrierlimitinceni2das1xpx2 AT jianhuidai heavyfermionquantumcriticalityatdilutecarrierlimitinceni2das1xpx2 AT zhuanxu heavyfermionquantumcriticalityatdilutecarrierlimitinceni2das1xpx2 AT qimiaosi heavyfermionquantumcriticalityatdilutecarrierlimitinceni2das1xpx2
_version_	1718388353963917312

Heavy fermion quantum criticality at dilute carrier limit in CeNi2−δ (As1−x P x )2

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