Jian Ma

activity

19931995

collaborators

7 papers

cond-mat1995

Scanning Tunneling Microscopy and Tunneling Luminescence of the Surface of GaN Films Grown by Vapor Phase Epitaxy

B. Garni, Jian Ma, N. Perkins +3

We report scanning tunneling microscopy (STM) images of surfaces of GaN films and the observation of luminescence from those films induced by highly spatially localized injection o…

cond-mat1994

$P b_{0.4} B i_{1.6} S r_{2} C a_{1} C u_{2} O_{8 + x}$ and Oxygen Stoichiometry: Structure, Resistivity, Fermi Surface Topology and Normal State Properties

Jian Ma, P. Alméras, R. J. Kelley +6

$P b_{0.4} B i_{1.6} S r_{2} C a C u_{2} O_{8 + x}$ ( $B i (P b) -$ 2212) single crystal samples were studied using transmission electron microscopy (TEM), $ab -$ plane ( $ρ_{ab}$ ) and $c -$ axis ( $ρ_{c}$ ) res…

cond-mat1994

Localization Effects in Bi2Sr2Ca(Cu,Co)2O8+y High Temperature Superconductors

C. Quitmann, P. Almeras, Jian Ma +4

Doping Bi2Sr2Ca1Cu2O8+y with Co causes a superconductor-insulator transition. We study correlations between changes in the electrical resistivity RHOab(T) and the electronic bandst…

cond-mat1994

Localized electronic states and photoemission superconducting condensate in Bi $_{2}$ Sr $_{2}$ Ca $_{1}$ Cu $_{2}$ O $_{8 + x}$

Jian Ma, C. Quitmann, R. J. Kelley +2

We present the first detailed angle-resolved photoemission evidence that there are two types of carriers that contribute to the photoemission superconducting condensate in $Bi_{2}S…

cond-mat1994

Observation of a van Hove Singularity in $B i_{2} S r_{2} C a_{1} C u_{2} O_{8 + x}$ with Angle Resolved Photoemission

Jian Ma, C. Quitmann, R. J. Kelley +4

We have performed high energy resolution angle-resolved photoemission studies of the normal state band structure of oxygen overdoped $B i_{2} S r_{2} C a_{1} C u_{2} O_{8 + x}$ . We find that…

cond-mat1994

Temperature dependence of the superconducting gap anisotropy in Bi $_{2}$ Sr $_{2}$ Ca $_{1}$ Cu $_{2}$ O $_{8 + x}$

Jian Ma, C. Quitmann, R. J. Kelley +3

We present the first detailed data of the momentum-resolved, temperature dependence of the superconducting gap of $B i_{2} S r_{2} C a_{1} C u_{2} O_{8 + x}$ , complemented by similar data on…

Scanning Tunneling Microscopy and Tunneling Luminescence of the Surface of GaN Films Grown by Vapor Phase Epitaxy

Pb0.4​Bi1.6​Sr2​Ca1​Cu2​O8+x​ and Oxygen Stoichiometry: Structure, Resistivity, Fermi Surface Topology and Normal State Properties

Localization Effects in Bi2Sr2Ca(Cu,Co)2O8+y High Temperature Superconductors

Localized electronic states and photoemission superconducting condensate in Bi2​Sr2​Ca1​Cu2​O8+x​

Observation of a van Hove Singularity in Bi2​Sr2​Ca1​Cu2​O8+x​ with Angle Resolved Photoemission

Temperature dependence of the superconducting gap anisotropy in Bi2​Sr2​Ca1​Cu2​O8+x​

$P b_{0.4} B i_{1.6} S r_{2} C a_{1} C u_{2} O_{8 + x}$ and Oxygen Stoichiometry: Structure, Resistivity, Fermi Surface Topology and Normal State Properties

Localized electronic states and photoemission superconducting condensate in Bi $_{2}$ Sr $_{2}$ Ca $_{1}$ Cu $_{2}$ O $_{8 + x}$

Observation of a van Hove Singularity in $B i_{2} S r_{2} C a_{1} C u_{2} O_{8 + x}$ with Angle Resolved Photoemission

Temperature dependence of the superconducting gap anisotropy in Bi $_{2}$ Sr $_{2}$ Ca $_{1}$ Cu $_{2}$ O $_{8 + x}$