Highly variable carbon environment in the κ-(BEDT-TTF)2Cu2(CN)3 salt probed by carbon K-edge x-ray absorption and resonant inelastic x-ray scattering spectroscopy

被引：1

作者：

Bayo, Djenabou ^{[1
,2
,3
]}

Baledent, Victor ^{[4
]}

Boccuni, Alberto ^{[1
]}

Ilakovac, Vita ^{[1
,5
]}

Carniato, Stephane ^{[1
]}

Foury-Leylekian, Pascale ^{[4
]}

Pouget, Jean-Paul ^{[4
]}

Nicolaou, Alessandro ^{[6
]}

Ruotsalainen, Kari ^{[7
]}

Bendounan, Azzedine ^{[6
]}

Bouaziz, Meryem ^{[6
]}

Joly, Yves ^{[8
]}

Miyagawa, Kazuya ^{[9
]}

Kanoda, Kazushi ^{[9
]}

Tomic, Silvia ^{[10
]}

机构：

[1] Sorbonne Univ, CNRS, LCPMR, F-75252 Paris, France

[2] Univ Warwick, Dept Phys, Coventry CV4 7AL, England

[3] CY Cergy Paris Univ, LPTM, CNRS, UMR 8089, Cergy Pontoise, France

[4] Univ Paris Saclay, LPS, CNRS, UMR 8502, Orsay, France

[5] CY Cergy Paris Univ, F-95031 Cergy Pontoise, France

[6] Synchrotron SOLEIL, BP 48, F-91192 Gif sur Yvette, France

[7] European Synchrotron Radiat Facil, 71 Ave Martyrs, F-38000 Grenoble, France

[8] Univ Grenoble Alpes, Inst Neel, CNRS, F-38042 Grenoble, France

[9] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan

[10] Ins Fiziku, Bijenicka C 46, HR-10000 Zagreb, Croatia

来源：

PHYSICAL REVIEW B | 2025年 / 111卷 / 12期

关键词：

QUANTUM SPIN LIQUID; STATE; SUPERCONDUCTIVITY; DYNAMICS; CRYSTAL; METAL;

D O I：

10.1103/PhysRevB.111.125160

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using near-edge x-ray absorption fine structure (NEXAFS) and resonant inelastic x-ray scattering (RIXS) at the C K-edge, we have studied the carbon environment and dynamics in kappa-(BEDT-TTF)2Cu2(CN)3 and supplemented them by density functional theory calculations. The maximum in the NEXAFS pre-edge is identified to originate mainly from nonequivalent carbon sites of the BEDT-TTF molecule, whereas the anionic carbons contribute to the intensity at higher energy. RIXS spectra show resonant reinforcement of the interorbital excitations, but without a clear set of vibrational harmonics, previously detected in our N K-edge RIXS study. This finding points to the strong multimode vibrational excitation of all carbon sites in both (BEDT-TTF)2+ molecular and Cu2(CN)3- anionic subsystems, thus demonstrating a strongly disordered environment which might have important implications for the electronic state of the kappa-(BEDT-TTF)2Cu2(CN)3.

引用

页数：11

共 60 条

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