Structural and electronic phase transitions of Co2Te3O8 spiroffite under high pressure

Li, NanaCtr High Pressure Sci & Technol Adv Res, Shanghai 201203, Peoples R China (författare)

The structural and electronic phase transitions of Co2Te3O8 spiroffite have been studied with a suite of in situ high-pressure characterization techniques including synchrotron x-ray diffraction, Raman, x-ray emission spectroscopy, UV-vis absorption, and electrical transport measurement. Two pressure-induced phase transitions were observed at about 6.9 and 14.4 GPa. The first transition is attributed to a small spin transition of Co along with discontinuity in unit-cell volume change, while the second one represents a first-order phase transition with a volume collapse of 4.5%. The latter transition is accompanied by the relaxation of distortion in CoO6 octahedron, which enhances the crystal-field strength inhibiting the occurrence of spin transition. What is more, the competition between contributions of electrons and oxygen ion to the overall conductivity is observed and affected by the phase transition under high pressure. This demonstration provides insights into the relationship between the lattice-structural and spin degrees of freedom, and highlights the impact of pressure on the control of structural and electronic states of a given material for optimized functionalities.

Manoun, BouchaibUniv Hassan 1Er, FST Settat, LS3M, Settat, Morocco;Mohammed VI Polytech Univ, Mat Sci & Nanoengn, Lot 660 Hay Moulay Rachid, Ben Guerir, Morocco (författare)
Tamraoui, YoussefMohammed VI Polytech Univ, Mat Sci & Nanoengn, Lot 660 Hay Moulay Rachid, Ben Guerir, Morocco (författare)
Zhang, QianCtr High Pressure Sci & Technol Adv Res, Shanghai 201203, Peoples R China (författare)
Dong, HainiCtr High Pressure Sci & Technol Adv Res, Shanghai 201203, Peoples R China (författare)
Xiao, YumingArgonne Natl Lab, Adv Photon Source, HPCAT, Argonne, IL 60439 USA (författare)
Chow, PaulArgonne Natl Lab, Adv Photon Source, HPCAT, Argonne, IL 60439 USA (författare)
Lazor, PeterUppsala universitet,Mineralogi, petrologi och tektonik(Swepub:uu)petelazo (författare)
Lu, XujieCtr High Pressure Sci & Technol Adv Res, Shanghai 201203, Peoples R China (författare)
Wang, YonggangCtr High Pressure Sci & Technol Adv Res, Shanghai 201203, Peoples R China (författare)
Yang, WengeCtr High Pressure Sci & Technol Adv Res, Shanghai 201203, Peoples R China (författare)
Ctr High Pressure Sci & Technol Adv Res, Shanghai 201203, Peoples R ChinaUniv Hassan 1Er, FST Settat, LS3M, Settat, Morocco;Mohammed VI Polytech Univ, Mat Sci & Nanoengn, Lot 660 Hay Moulay Rachid, Ben Guerir, Morocco (creator_code:org_t)

Av författaren/redakt...: Li, Nana; Manoun, Bouchaib; Tamraoui, Yousse ...; Zhang, Qian; Dong, Haini; Xiao, Yuming; visa fler...; Chow, Paul; Lazor, Peter; Lu, Xujie; Wang, Yonggang; Yang, Wenge; visa färre...

Om ämnet

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.