TY - JOUR
T1 - Structure and magnetic property of potassium intercalated pentacene
T2 - Observation of superconducting phase in KxC22H14
AU - Nakagawa, Takeshi
AU - Yuan, Zhen
AU - Zhang, Jun
AU - Yusenko, Kirill V.
AU - Drathen, Christina
AU - Liu, Qingqing
AU - Margadonna, Serena
AU - Jin, Changqing
N1 - Funding Information:
This project was funded by International Young Scientists Fellowship (Grant no. 2014013) of ChineseAcademy of Sciences (CAS). This is part of works granted by KCWONG foundation of CAS. The work was also supported by NSF and MOST of China through research projects
Publisher Copyright:
© 2016 IOP Publishing Ltd.
PY - 2016/9/26
Y1 - 2016/9/26
N2 - We report the results from systematic investigations on the structure and magnetic properties of potassium intercalated pentacene as a function of potassium content, KxC22H14 (1 x 3). Synchrotron radiation powder x-ray diffraction technique revealed that there are two different stable phases can be obtained via potassium intercalation, namely, K1C22H14 phase and K3C22H14 phase. Structural phase transition was induced when the potassium content was increased to the nominal value x = 3. This phase transition is accompanied by drastic change in their magnetic property, where those samples with compositions K1C22H14 shows ferromagnetic behavior and those with near K3C22H14 lead to observation of superconductivity with transition temperature, T c, of 4.5 K. It is first time that superconductivity was observed in linear oligoacenes. Both magnetization study and synchrotron radiation powder x-ray diffraction clearly indicates that the superconducting phase belong to K3C22H14 as a result of phase transition from triclinic to monoclinic structure induced by chemical doping.
AB - We report the results from systematic investigations on the structure and magnetic properties of potassium intercalated pentacene as a function of potassium content, KxC22H14 (1 x 3). Synchrotron radiation powder x-ray diffraction technique revealed that there are two different stable phases can be obtained via potassium intercalation, namely, K1C22H14 phase and K3C22H14 phase. Structural phase transition was induced when the potassium content was increased to the nominal value x = 3. This phase transition is accompanied by drastic change in their magnetic property, where those samples with compositions K1C22H14 shows ferromagnetic behavior and those with near K3C22H14 lead to observation of superconductivity with transition temperature, T c, of 4.5 K. It is first time that superconductivity was observed in linear oligoacenes. Both magnetization study and synchrotron radiation powder x-ray diffraction clearly indicates that the superconducting phase belong to K3C22H14 as a result of phase transition from triclinic to monoclinic structure induced by chemical doping.
KW - aromatic hydrocarbon
KW - physical properties
KW - superconductivity
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U2 - 10.1088/0953-8984/28/48/484001
DO - 10.1088/0953-8984/28/48/484001
M3 - Article
AN - SCOPUS:84991280134
VL - 28
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
SN - 0953-8984
IS - 48
M1 - 484001
ER -