Asad Niazi's Home Page

Asad Niazi

Lecturer

Department of Physics,
Jamia Millia Islamia,
Jamia Nagar,
New Delhi 110025, India

Tel. Phone: +91 (11) 6314631 (O)

Fax: +91 (11) 6840229

e-mail:

Ph.D. (Jawaharlal Nehru University)

Research Interest

I am interested in the low temperature electrical, magnetic and thermal behavior of transition metal oxides and chalcogenides. I try to understand the role of disorder and dimensionality in influencing the electronic properties of these strongly correlated, narrow d- and f-band systems. I synthesize these compounds by the solid state route/vapor transport/flux growth in single- as well as poly-crystalline form, characterize them by x-ray diffraction, SEM, titration, etc. and study their electrical transport, thermoelectric power, heat capacity and magnetic susceptibility in the temperature range 2 K - 500 K. The systems I have been studying, along with the principal focus of research, are listed below:

Spin-chain oxides A₃M'MO₆ (A = Alkaline Earth Sr/Ca/Ba; M/M' = Magnetic/non-magnetic metal Cu, Zn, Ir, Pt, Fe, Co, Rh): Low-dimensional magnetism.
Layered, intercalated, transition metal dichalcogenides M_xTX_2, and vacancy ordered, T₄--clustered, chalcogenide spinels M_xT₄X₈ (M = Ga, Al; T = V, Nb, Ta, Mo; X = S, Se, Te): Coulomb-interaction effects in electron transport and magnetism.\\
Low Sr doped rare-earth manganites La_1-xSr_xMn_1-yAl_yO₃: Stoichiometry driven electronic phase separation effects in electron transport and magnetism.

Future plans include thin-film/templated growth, inducing controlled disorder by ion-irradiation, and spectroscopic studies using neutron/synchrotron sources. The understanding of such complex systems is far from complete and they are currently of great interest to material science and condensed matter physics from the fundamental as well as possible application point of view.

Publications