Multiband nodeless superconductivity near the charge-density-wave quantum critical point in ZrTe3–xSex

Cui, Shan; He, Lan -Po; Hong, Xiao -Chen; Zhu, Xiang -De; Petrovic, Cedomir; Li, Shi -Yan

doi:10.1088/1674-1056/25/7/077403

Title: Multiband nodeless superconductivity near the charge-density-wave quantum critical point in ZrTe_3–xSe_x

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Abstract

It was found that selenium doping can suppress the charge-density-wave (CDW) order and induce bulk superconductivity in ZrTe₃. The observed superconducting dome suggests the existence of a CDW quantum critical point (QCP) in ZrTe_3–x Se_x near x ≈ 0.04. To elucidate the superconducting state near the CDW QCP, we measure the thermal conductivity of two ZrTe_3–x Se_x single crystals (x = 0.044 and 0.051) down to 80 mK. For both samples, the residual linear term κ₀/T at zero field is negligible, which is a clear evidence for nodeless superconducting gap. Furthermore, the field dependence of κ₀/T manifests a multigap behavior. Lastly, these results demonstrate multiple nodeless superconducting gaps in ZrTe_3–x Se_x, which indicates conventional superconductivity despite of the existence of a CDW QCP.

Authors:

Cui, Shan ^[1]; He, Lan -Po ^[1]; Hong, Xiao -Chen ^[1]; Zhu, Xiang -De ^[2]; Petrovic, Cedomir ^[3]; Li, Shi -Yan ^[4]

Fudan Univ., Shanghai (China)
Chinese Academy of Sciences and Univ. of Science and Technology of China, Hefei (China); Brookhaven National Lab. (BNL), Upton, NY (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States)
Fudan Univ., Shanghai (China); Collaborative Innovation Center of Advanced Microstructures, Nanjing (China)

Publication Date:: 2016-06-09

Research Org.:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1345739

Report Number(s):: BNL-113579-2017-JA
Journal ID: ISSN 1674-1056; R&D Project: PM016; KC0201050

Grant/Contract Number:: SC00112704

Resource Type:: Accepted Manuscript

Journal Name:: Chinese Physics. B

Additional Journal Information:: Journal Volume: 25; Journal Issue: 7; Journal ID: ISSN 1674-1056

Publisher:: IOP Publishing

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; superconductivity; charge-density-wave order; thermal transport measurement; gap structure

Citation Formats


                    Cui, Shan, He, Lan -Po, Hong, Xiao -Chen, Zhu, Xiang -De, Petrovic, Cedomir, and Li, Shi -Yan. Multiband nodeless superconductivity near the charge-density-wave quantum critical point in ZrTe3–xSex.  United States: N. p., 2016. 
Web.  doi:10.1088/1674-1056/25/7/077403.

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                    Cui, Shan, He, Lan -Po, Hong, Xiao -Chen, Zhu, Xiang -De, Petrovic, Cedomir, & Li, Shi -Yan. Multiband nodeless superconductivity near the charge-density-wave quantum critical point in ZrTe3–xSex.  United States.  https://doi.org/10.1088/1674-1056/25/7/077403

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                    Cui, Shan, He, Lan -Po, Hong, Xiao -Chen, Zhu, Xiang -De, Petrovic, Cedomir, and Li, Shi -Yan. Thu .  
"Multiband nodeless superconductivity near the charge-density-wave quantum critical point in ZrTe3–xSex".  United States.  https://doi.org/10.1088/1674-1056/25/7/077403.  https://www.osti.gov/servlets/purl/1345739.

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@article{osti_1345739,

  title        = {Multiband nodeless superconductivity near the charge-density-wave quantum critical point in ZrTe3–xSex},

  author       = {Cui, Shan and He, Lan -Po and Hong, Xiao -Chen and Zhu, Xiang -De and Petrovic, Cedomir and Li, Shi -Yan},

  abstractNote = {It was found that selenium doping can suppress the charge-density-wave (CDW) order and induce bulk superconductivity in ZrTe3. The observed superconducting dome suggests the existence of a CDW quantum critical point (QCP) in ZrTe3–x Sex near x ≈ 0.04. To elucidate the superconducting state near the CDW QCP, we measure the thermal conductivity of two ZrTe3–x Sex single crystals (x = 0.044 and 0.051) down to 80 mK. For both samples, the residual linear term κ0/T at zero field is negligible, which is a clear evidence for nodeless superconducting gap. Furthermore, the field dependence of κ0/T manifests a multigap behavior. Lastly, these results demonstrate multiple nodeless superconducting gaps in ZrTe3–x Sex, which indicates conventional superconductivity despite of the existence of a CDW QCP.},

  doi          = {10.1088/1674-1056/25/7/077403},

  journal      = {Chinese Physics. B},

  number       = 7,

  volume       = 25,

  place        = {United States},

  year         = {2016},

  month        = {6}

}

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Title: Multiband nodeless superconductivity near the charge-density-wave quantum critical point in ZrTe3–xSex

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Title: Multiband nodeless superconductivity near the charge-density-wave quantum critical point in ZrTe_3–xSe_x