三角晶格自旋液体候选材料NaYbSe<sub>2</sub>在高压下的超导转变

郭琳; 杨小帆; 程二建; 泮炳霖; 朱楚楚; 李世燕

doi:10.7498/aps.72.20230730

摘要

量子自旋液体是一种由于自旋阻挫直到零温都不能形成磁有序的新奇量子态, 并且和高温超导密切相关, 因此, 能否通过压力或化学掺杂等方式在量子自旋液体材料中调控出超导态甚至高温超导是一个重要的物理问题. 二维三角晶格稀土硫属化合物NaYbCh₂(Ch = O, S, Se)在比热、核磁共振、中子散射等实验中未出现长程磁有序, 被认为可能具有量子自旋液体基态. 本文研究了NaYbCh₂ (Ch = Se, S, O)在压力下的电输运行为. 对于NaYbSe₂, 当压力加到26.9 GPa时出现超导转变, 表现出零电阻行为, 其超导转变温度(T_c)约为5.6 K, 并且直到45 GPa都保持基本不变, 得出了其超导转变温度对压力的相图; 对于NaYbS₂, 压力使其室温电阻从10 GPa下10¹¹ Ω量级降低到67 GPa的10 Ω量级, 然而其电阻随温度行为没有出现金属性, 也没有发生超导转变; 而对于NaYbO₂, 其从常压到60 GPa高压一直保持完全绝缘态, 没有可观测的电阻.

关键词:

量子自旋液体 /
高压 /
电输运

Abstract

Quantum spin liquid is an exotic state without magnetic order down to zero-temperature due to spin frustration, which is closely related to high temperature superconductivity. Therefore, an important issue arises whether the quantum spin liquid can be adjusted into a superconductor, even high-T_c superconductor, by using pressure or chemical doping. Rear-earth chalcogenides NaYbCh₂ (Ch = O, S, Se), consisting of planar triangular lattice, exhibit no long-range magnetic order down to the lowest measured temperatures in specific heat, nuclear magnetic resonance, and neutron scattering, and are considered as a quantum spin liquid candidate. Here we investigate the electrical transport properties of NaYbCh₂ (Ch = O, S, Se) under high pressures. For NaYbSe₂, zero-resistance behavior is observed at 26.9 GPa, showing that the superconductivity comes into being. The superconducting transition temperature (T_c) is around 5.6 K at 26.9 GPa and robust against pressure till 45 GPa. The phase diagram of T_c versus pressure for NaYbSe₂ is constructed. For NaYbS₂, the room temperature resistance decreases from the order of 10¹¹ Ω at 10 GPa to 10 Ω at 67 GPa. However, neither superconductivity nor insulator-metal transition is observed. Additionally, the NaYbO₂ keeps insulating and the resistance is too large to be detected in a pressure range of 0–60 GPa.

Keywords:

作者及机构信息

复旦大学物理系, 应用表面物理国家重点实验室, 上海　200438

通信作者: 李世燕, shiyan_li@fudan.edu.cn

基金项目: 国家重点研发计划(批准号: 2022YFA1402203)和国家自然科学基金(批准号: 12034004)资助的课题.

Authors and contacts

State Key Laboratory of Surface Physics, Department of Physics, Fudan University, Shanghai 200438, China

Corresponding author: Li Shi-Yan, shiyan_li@fudan.edu.cn

Funds: Project supported by the National Key R&D Program of China (Grant No. 2022YFA1402203) and the National Natural Science Foundation of China (Grant No. 12034004).

文章全文

参考文献

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施引文献

图 1 (a) NaYbSe₂/NaYbS₂的晶体结构图; (b) NaYbSe₂单晶的XRD谱; (c) NaYbSe₂粉末的XRD谱

Fig. 1. (a) Crystal structure of NaYbSe₂/NaYbS₂; (b) XRD patten of NaYbSe₂ single crystal; (c) XRD patten of NaYbSe₂ powder.

下载: 全尺寸图片幻灯片

图 2 (a) 不同压力下NaYbSe₂电阻随温度的依赖关系, 其中17.9 GPa的R(T)曲线的值为$R\times {1}/{4}$; (b) 26.9—45.4 GPa压力范围内, NaYbSe₂在低温下的超导转变及其T_c^onset和T_c^zero

Fig. 2. (a) Temperature dependence of the resistance for NaYbSe₂ under various pressures. The resistance values at 17.9 GPa are $R\times {1}/{4}$. (b) Superconducting transition of NaYbSe₂ at low temperature between 26.9 and 45.4 GPa. The arrows indicate the T_c^onset and T_c^zero.

下载: 全尺寸图片幻灯片

图 3 (a) 外加压力为26.9 GPa时NaYbSe₂在不同磁场下的低温电阻随温度的依赖关系; (b) NaYbSe₂上临界磁场随温度的依赖关系

Fig. 3. (a) With the pressure of 26.9 GPa, the temperature dependence of the resistance for NaYbSe₂ at low temperature under different magnetic fields; (b) temperature dependence of the upper critical field for NaYbSe₂

下载: 全尺寸图片幻灯片

图 4 NaYbSe₂的压力-温度相图, 图中红色方点代表不同压力下NaYbSe₂的T_c, 蓝色圆点代表不同压力下Se的T_c

Fig. 4. Pressure-temperature phase diagram of NaYbSe₂. The red square dots denote T_c of NaYbSe₂ under different pressures. The blue circle dots denote T_c of Se under different pressures.

下载: 全尺寸图片幻灯片

图 5 (a) 不同压力下NaYbS₂样品电阻随温度的依赖关系; (b) 300 K时NaYbS₂样品的电阻随压力的依赖关系

Fig. 5. (a) Temperature dependence of the resistance for NaYbS₂ under various pressure; (b) pressure dependence of the resistance for NaYbS₂ at 300 K

下载: 全尺寸图片幻灯片

[1]	Anderson P W 1973 Mater. Res. Bull. 8 153 Google Scholar
[2]	Anderson P W 1987 Science 235 1196 Google Scholar
[3]	Anderson P W, Baskaran G, Zou Z, Hsu T 1987 Phys. Rev. Lett. 58 2790 Google Scholar
[4]	Savary L, Balents L 2017 Rep. Prog. Phys. 80 016502 Google Scholar
[5]	Zhou Y, Kanoda K, Ng T K 2017 Rev. Mod. Phys. 89 025003 Google Scholar
[6]	Balents L 2010 Nature 464 199 Google Scholar
[7]	Li Y, Liao H Zhang Z, Li S, Jin F, Liang L, Zhang L, Zou Y, Pi L, Yang Z, Wang J, Wu Z, Zhang Q 2015 Sci. Rep. 5 16419 Google Scholar
[8]	Shimizu Y, Miyagawa K, Kanoda K, Maesato M, Saito G 2003 Phys. Rev. Lett. 91 107001 Google Scholar
[9]	Norman M R 2016 Rev. Mod. Phys. 88 041002 Google Scholar
[10]	Banerjee A, Briges C A, Yan J Q, et al. 2016 Nat. Mater. 15 733 Google Scholar
[11]	Zhong R, Gao T, Ong N P, Cava R J 2020 Sci. Adv. 6 eaay6953 Google Scholar
[12]	郭静, 孙力玲 2015 物理学报 64 217406 Google Scholar Guo J, Sun L L 2015 Acta Phys. Sin. 64 217406 Google Scholar
[13]	Qi Y, Sachdev S 2008 Phys. Rev. B 77 165112 Google Scholar
[14]	Powell B J, McKenzie R H 2011 Rep. Prog. Phys. 74 056501 Google Scholar
[15]	Kurosaki Y, Shimizu Y, Miyagawa K, Kanoda K, Saito G 2005 Phys. Rev. Lett. 95 177001 Google Scholar
[16]	Shimizu Y, Hiramatsu T, Maesato M, Otsuka A, Yamochi H, Ono A, Itoh M, Yoshida M, Takigawa M, Yoshida Y, Saito G 2016 Phys. Rev. Lett. 117 107203 Google Scholar
[17]	Jin C, Wang Y, Jin M, Jiang Z, Jiang D, Li J, Nakamoto Y, Shimizu K, Zhu J 2022 Phys. Rev. B 105 144402 Google Scholar
[18]	Kozlenko D P, Kusmartseva A F, Lukin E V, Keen D A, Marshall W G, de Vries M A, Kamenev K V 2012 Phys. Rev. Lett. 108 187207 Google Scholar
[19]	Kelly Z A, Gallagher M J, McQueen T M 2016 Phys. Rev. X 6 041007 Google Scholar
[20]	Xi X, Bo X, Xu X S, Kong P P, Liu Z, Hong X G, Jin C Q, Cao G, Wan X, Carr G L 2018 Phys. Rev. B 98 125117 Google Scholar
[21]	Layek S, Mehlawat K, Levy D, Greenberg E, Pasternak M P, Itié J P, Singh Y, Rozenberg G K 2020 Phys. Rev. B 102 085156 Google Scholar
[22]	Wang Z, Guo J, Tafti F F, et al. 2018 Phys. Rev. B 97 245149 Google Scholar
[23]	Liu W, Zhang Z, Ji J, Liu Y, Li J, Wang X, Lei H, Chen G, Zhang Q 2018 Chin. Phys. Lett. 35 117501 Google Scholar
[24]	Baenitz M, Schlender Ph, Sichelschmidt J, Onykiienko Y A, Zangeneh Z, Ranjith K M, Sarkar R, Hozoi L, Walker H C, Orain J C, Yasuoka H, van den Brink J, Klauss H H, Inosov D S, Doert Th 2018 Phys. Rev. B 98 220409 Google Scholar
[25]	Dai P L, Zhang G, Xie Y, Duan C, Gao Y, Zhu Z, Feng E, Tao Z, Huang C L, Cao H, Podlesnyak A, Granroth G E, Everett M S, Neuefeind J C, Voneshen D, Wang S, Tan G, Morosan E, Wang X, Lin H Q, Shu L, Chen G, Guo Y, Lu X, Dai P 2021 Phys. Rev. X 11 021044 Google Scholar
[26]	Zhang Z, Ma X, Li J, Wang G, Adroja D T, Perring T P, Liu W, Jin F, Ji J, Wang Y, Kamiya Y, Wang X, Ma J, Zhang Q 2021 Phys. Rev. B 103 035144 Google Scholar
[27]	Bordelon M, Liu C, Posthuma L, Sarte P M, Butch N P, Pajerowski D M, Banerjee A, Balents L, Wilson S D 2020 Phys. Rev. B 101 224427 Google Scholar
[28]	Bordelon M M, Kenney E, Liu C, Hogan T, Posthuma L, Kavand M, Lyu Y, Sherwin M, Butch N P, Brown C, Graf M J, Balents L, Wilson S D 2019 Nat. Phys. 15 1058 Google Scholar
[29]	Jia Y T, Gong C S, Liu Y X, Zhao J F, Dong C, Dai G Y, Li X D, Lei H C, Yu R Z, Zhang G M, Jin C Q 2020 Chin. Phys. Lett. 37 097404 Google Scholar
[30]	Zhang Z, Yin Y, Ma X, Liu W, Li J, Jin F, Ji J, Wang Y, Wang X, Yu X, Zhang Q 2020 arXiv: 2003.11479v1
[31]	Schleid T, Lissner F 1993 Eur. J. Sol. State Inorg. Chem. 30 829
[32]	Gray A K, Martin B R, Dorhout P K 2003 Z. Kristallor.-New Cryst. Struct. 218 19
[33]	Akahama Y, Kobayashi M, Kawamura H 1992 Solid State Commun. 84 803 Google Scholar
[34]	Yang P T, Liu Z Y, Chen K Y, Liu X L, Zhang X, Yu Z H, Zhang H, Sun J P, Uwatoko Y, Dong X L, Jiang K, Hu J P, Guo Y F, Wang B S, Cheng J G 2022 Nat. Commun. 13 2975 Google Scholar

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三角晶格自旋液体候选材料NaYbSe₂在高压下的超导转变