399 citations
- Tata Institute of Fundamental ResearchIN18 papers
- Saha Institute of Nuclear PhysicsIN16 papers
- University of CalcuttaIN16 papers
- Inter-University Centre for Astronomy and AstrophysicsIN11 papers
- Indian Association for the Cultivation of ScienceIN8 papers
- Sorbonne UniversitéFR7 papers
- Jamia Millia IslamiaIN6 papers
- Laboratoire de Physique Théorique et Hautes EnergiesFR6 papers
- Weizmann Institute of ScienceIL6 papers
- Centre National de la Recherche ScientifiqueFR5 papers
- Indian Institute of Science BangaloreIN5 papers
- Kyoto UniversityJP5 papers
8 papers · 1 filter
Huge Positive Magnetoresistance in Antiferromagnetic Double Perovskite Metals
Viveka Nand Singh, Pinaki Majumdar
Metals with large positive magnetoresistance are rare. We demonstrate that antiferromagnetic metallic states, as have been predicted for the double perovskites, are excellent candi…
Magnetic Order Beyond RKKY in the Classical Kondo Lattice
Kalpataru Pradhan, Pinaki Majumdar
We study the Kondo lattice model of band electrons coupled to classical spins, in three dimensions, using a combination of variational calculation and Monte Carlo. We use the weak…
Exploiting B Site Disorder for Phase Control in the Manganites
Kalpataru Pradhan, Anamitra Mukherjee, Pinaki Majumdar
Disorder on the active d element site is usually very disruptive for conduction and long range order in perovskite transition metal oxides. However, in the background of phase comp…
The Distinct Effects of Homogeneous Weak Disorder and Dilute Strong Scatterers on Phase Competetion in the Manganites
Kalpataru Pradhan, Anamitra Mukherjee, Pinaki Majumdar
We study the two orbital double-exchange model in two dimensions in the presence of antiferromagnetic (AF) superexchange, strong Jahn-Teller coupling, and substitutional disorder.…
Unusual doping and temperature dependence of photoemission spectra from manganites
Prabuddha Sanyal, Subhra Sen Gupta, Nandan Pakhira +3
A recent, major, puzzle in the core-level photoemission spectra of doped manganites is the observation of a 1-2 eV wide shoulder with intensity varying with temperature T as the sq…
The Effect of Disorder in an Orbitally Ordered Jahn-Teller Insulator
Sanjeev Kumar, Arno P. Kampf, Pinaki Majumdar
We study a two dimensional, two-band double-exchange model for electrons coupled to Jahn-Teller distortions in the presence of quenched disorder using a recently developed Mo…