Quasi-one-dimensional superconductivity in the pressurized charge-density-wave conductor HfTe3

被引：23

作者：

Liu, Z. Y. ^{[1
,2
,3
]}

Li, J. ^{[2
,3
,4
,7
]}

Zhang, J. F. ^{[5
]}

Yang, P. T. ^{[2
,3
]}

Zhang, S. ^{[2
,3
,4
]}

Chen, G. F. ^{[2
,3
,4
]}

Uwatoko, Y. ^{[6
]}

Yang, H. X. ^{[2
,3
,4
]}

Sui, Y. ^{[1
]}

Liu, K. ^{[5
]}

Cheng, J-G ^{[2
,3
,4
]}

机构：

[1] Harbin Inst Technol, Sch Phys, Harbin 150001, Peoples R China

[2] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[3] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[4] Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100190, Peoples R China

[5] Renmin Univ China, Dept Phys, Beijing Key Lab Optoelect Funct Mat & Micronano D, Beijing 100872, Peoples R China

[6] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

[7] Shijiazhuang TieDao Univ, Dept Math & Phys, Shijiazhuang 050043, Hebei, Peoples R China

来源：

NPJ QUANTUM MATERIALS | 2021年 / 6卷 / 01期

基金：

中国国家自然科学基金; 国家重点研发计划; 北京市自然科学基金;

关键词：

TOTAL-ENERGY CALCULATIONS; CRYSTAL-STRUCTURE;

D O I：

10.1038/s41535-021-00393-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

HfTe3 single crystal undergoes a charge-density-wave (CDW) transition at T-CDW = 93 K without the appearance of superconductivity (SC) down to 50 mK at ambient pressure. Here, we determined its CDW vector q = 0.91(1) a* + 0.27(1) c* via low-temperature transmission electron microscope and then performed comprehensive high-pressure transport measurements along three major crystallographic axes. Our results indicate that the superconducting pairing starts to occur within the quasi-one-dimensional (Q1D) -Te2-Te3- chain at 4-5 K but the phase coherence between the superconducting chains cannot be realized along either the b- or c-axis down to at least 1.4 K, giving rise to an extremely anisotropic SC rarely seen in real materials. We have discussed the prominent Q1D SC in pressurized HfTe3 in terms of the anisotropic Fermi surfaces arising from the unidirectional Te-5p(x) electronic states and the local pairs formed along the -Te2-Te3- chains based on the first-principles electronic structure calculations.

引用

页数：12

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