Possible electron doping of geometrically perfect spin-1/2 kagome-lattice barlowite by reduced graphene oxide,Physical Review B

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Possible electron doping of geometrically perfect spin-1/2 kagome-lattice barlowite by reduced graphene oxide
Physical Review B ( IF 3.2 ) Pub Date : 2021-09-27 , DOI: 10.1103/physrevb.104.l100418
Kriti Gupta ₁ , Pranay Ninawe ₁ , Anil Jain _{2,

3} , Arun Dadwal ₄ , M. Anas ₅ , V. K. Malik ₅ , S. M. Yusuf _{2,

3} , Pattayil A. Joy ₄ , Nirmalya Ballav ₁

Affiliation

Doping of quantum spin liquid (QSL) insulators by electron or hole leads to intriguing phase transitions to metallic and superconducting states. The barlowite family with geometrically perfect

S = 1 / 2

kagome planes and tunable interkagome coupling is an emerging platform to realize spin-ordered, valence bond crystal, QSL states. Theoretical investigations on electron doping revealed localized states in the band gap of barlowite unlike metallicity in cuprate (

{Nd}_{2} Cu O_{4}

). We present successful anchoring of phase-pure barlowite crystallites onto reduced graphene oxide (rGO). The resulting barlowite-rGO system was found to be an electrical semiconductor with Arrhenius activation energy of 0.07 eV. Semiconducting properties of the barlowite-rGO system were further modulated with retention of structural integrity. We have attributed such a transformation of electrical transport response to plausible electron doping thereby making charge-doping experiments on barlowite and its analogs propitious.

中文翻译：

通过还原氧化石墨烯可能对几何完美的自旋 1/2 kagome-lattice barlowite 进行电子掺杂

电子或空穴对量子自旋液体 (QSL) 绝缘体的掺杂导致了向金属和超导状态的有趣相变。具有完美几何形状的巴洛伊特家族

秒 = 1 / 2

Kagome 平面和可调谐 interkagome 耦合是实现自旋有序、价键晶体、QSL 状态的新兴平台。电子掺杂的理论研究揭示了与铜酸盐中的金属丰度不同，巴洛维特带隙中的局域态。

钕_{2} 铜 哦_{4}

）。我们展示了相纯巴洛维特微晶在还原氧化石墨烯 (rGO) 上的成功锚定。发现所得的 barlowite-rGO 系统是一种电半导体，其 Arrhenius 激活能为 0.07 eV。barlowite-rGO 系统的半导体特性进一步调节，同时保持结构完整性。我们将这种电传输响应的转变归因于合理的电子掺杂，从而对巴洛石及其类似物进行了电荷掺杂实验。

更新日期：2021-09-28

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