1926/01/01 by Yi Sun, Wenhao Zhang, Ying Xing +8 · 4 citations
Materials Science · Medicine · Neuroscience · Physics and Astronomy · #Arrhenius equation #Biology #Blood Pressure and Hypertension Studies #Crossover #Electrical conductor #Electrical resistivity and conductivity #Electronic and Structural Properties of Oxides #Iron-based superconductors research #Magnetization #Neurological Disorders and Treatments #Neuroscience #Physics of Superconductivity and Magnetism #Retina #Retinal Diseases and Treatments #Substrate (aquarium) #Superconductivity #Thermal conduction #cond-mat.mes-hall #cond-mat.supr-con
paper · pdf · doi:10.1038/srep06040
published as Scientific Reports 4, 6040 (2014)
openalex publication_date 1926/01/01 · arxiv created 2014/04/18 · arxiv updated 2014/08/14 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/31
Interface enhanced superconductivity at two dimensional limit has become one of most intriguing research directions in condensed matter physics. Here, we report the superconducting properties of ultra-thin FeSe films with the thickness of one unit cell (1-UC) grown on conductive and insulating SrTiO3 (STO) substrates. For the 1-UC FeSe on conductive STO substrate (Nb-STO), the magnetization versus temperature (M-T) measurement shows a drop crossover around 85 K. For the FeSe films on insulating STO substrate, systematic transport measurements were carried out and the sheet resistance of FeSe films exhibits Arrhenius TAFF behavior with a crossover from a single-vortex pinning region to a collective creep region. More intriguing, sign reversal of Hall resistance with temperature is observed, demonstrating a crossover from hole conduction to electron conduction above TC in 1-UC FeSe films.