1999/03/27 by Amlan Biswas, A. Arulraj, Anthony Arulraj +2
Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Charge (physics) #Charge ordering #Condensed matter physics #Electrical resistivity and conductivity #Field (mathematics) #High-pressure geophysics and materials #Magnetic and transport properties of perovskites and related materials #Magnetic field #Materials science #Physics #Quantum tunnelling #cond-mat.str-el
paper · pdf · doi:10.1088/0953-8984/12/6/106
published as J. Phys: Condens. Matter, volume 12, L101 (2000) · 4 pages REVTeX, 5 postscript figures included, submitted to Phys. Rev. Lett
arxiv created 1999/03/27 · openalex publication_date 2000/01/26 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We report results of tunneling studies on the charge ordering compound Nd 0.5 Sr 0.5 MnO 3 in a magnetic field up to 6 T and for temperature down to 25 K.We show that a gap (2 CO 0.5 eV opens up in the density of state (DOS) at the Fermi level ( E F ) on charge ordering ( T CO = 150 K) which collapses in an applied magnetic field when the charge ordered state melts. There is a clear correspondence between the behaviour of the resistivity and the gap formation and its collapse in an applied magnetic field. We conclude that a gap in the DOS at E F is necessary for the stability of the charge ordered state.