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1. Pramod Kumar and N. S. Vidhyadhiraja,
From mixed valence to the Kondo lattice regime,
Journal of Physics: Condensed Matter,
(2011).
In Press.
2. A. Taraphder, S. Koley, N. S. Vidhyadhiraja and Mukul. S. Laad,
Preformed excitonic liquid route to charge density wave in 2H-TaSe 2,
Physical Review letters,
106, 236405 (2011).
3. K. Mallikarjuna Rao, Bhuvana Thiruvelu, Radha. B, Narendra Kurra, N. S. Vidhyadhiraja and G. U. Kulkarni,
Metallic Conduction in NiS2 Nanocrystalline Structures.,
Journal of Physical Chemistry,
115, 10462 - 10467 (2011).
4. H. Barman and N. S. Vidhyadhiraja,
Transport and Spectra in the half-filled Hubbard model: A dynamical mean-field study.,
International Journal of Modern Physics B,
25, 2461 - 2479 (2011).
5. Sabyasachi Mukhopadhyay, Rakesh Voggu, C.N.R.Rao, N.S.Vidhyadhiraja and K.S.Narayan,
Lateral photocurrent scanning of donor and acceptor polymers on graphene coated substrates,
Japanese Journal of Applied Physics,
50, 061602 (2011).
6. D. Parihari, N. S. Vidhyadhiraja and A. Taraphder,
Field dependent dynamics in the metallic regime of the half-filled Hubbard model,
Journal of Physics: Condensed Matter,
23, 055602 (2011).
pdf
, 8 Pages, Read abstract. A systematic study of the effect of magnetic field (h) on the Hubbard model has been carried
out at half-filling within dynamical mean field theory. In agreement with previous studies, we
find a zero temperature itinerant metamagnetic transition, reflected in the discontinuous changes
in magnetization as well as in the hysteresis, from a paramagnetic (PM) metallic state to a
polarized quasi-ferromagnetic (QFM) state, at intermediate and large interaction strengths (U).
The jump in magnetization vanishes smoothly with decreasing interaction strength, and at a
critical U, the transition becomes continuous. The region of ‘coexistence’ of the PM and QFM
solutions in the field–U plane obtained in this study agrees quantitatively with recent numerical
renormalization group calculations, thus providing an important benchmark. We highlight the
changes in dynamics and quasiparticle weight across this transition. The effective mass
increases sharply as the transition is approached, exhibiting a cusp-like singularity at the critical
field, and decreases with field monotonically beyond the transition. We conjecture that the first
order metamagnetic transition is a result of the competition between Kondo screening, that tries
to quench the local moments, and Zeeman coupling, which induces polarization and hence
promotes local moment formation. A comparison of our theoretical results with experiments on
3He indicate that a theory of 3He based on the half-filled Hubbard model places it in a regime of
intermediate interaction strength.
7. Abhay. K. Tiwari and N.S.Vidhyadhiraja,
Transient and steady state lateral charge transport in polymeric semiconductors.
,
Optical and Quantum Electronics (Springer),
41, 787 - 793 (2009).
pdf
8. D Gupta, N S Vidhyadhiraja, K S Narayan,
Transport of Photogenerated Charge Carriers in Polymer Semiconductors,
Proceedings of the IEEE,
97, 1558 - 1569 (2009).
pdf
9. N S Vidhyadhiraja, A Macridin, C Sen, M Jarrell and Michael Ma,
Quantum Critical Point at Finite Doping in the 2D Hubbard Model: A Dynamical Cluster Quantum Monte Carlo Study,
Physical Review Letters,
102, 206407 (2009).
pdf
10. Debabrata Parihari, N S Vidhyadhiraja,
Magnetoresistance in paramagnetic heavy fermion metals,
Journal of Physics: Condensed Matter,
21, 405602 (2009).
pdf
11. Debabrata Parihari, N S Vidhyadhiraja and David E Logan,
Interplay between strong correlations and magnetic field in the symmetric periodic Anderson model,
Physical Review B,
78, 035128 (2008).
pdf
12. D Kabra, J. Verma, N S Vidhyadhiraja and K S Narayan,
Model for Studies of Lateral Photovoltaic Effect in Polymeric Semiconductors,
IEEE Sensors Journal,
8, 1663 - 1671 (2008).
pdf
13. N S Vidhyadhiraja,
On the specific heat of heavy fermion systems using the periodic Anderson model,
Europhysics Letters,
77, 36001 (2007).
pdf
14. Anne Gilbert, N S Vidhyadhiraja and David E Logan,
Interaction effects in mixed-valent Kondo insulators,
Journal of Physics: Condensed Matter,
19, 106220 (2007).
pdf
15. D Kabra, S Shriram, N S Vidhyadhiraja and K S Narayan,
Charge carrier dynamics in organic semiconductors by position dependent optical probing,
Journal of Applied Physics,
101, 64510 (2007).
pdf
16. D Kabra, N S Vidhyadhiraja and K S Narayan,
Lateral Photovoltaic Effect in Conjugated Polymers Based Structures for Position Sensitive Detectors,
Cintelliq-Organics Electronics Conference and Exhibition,
(2006).
17. N S Vidhyadhiraja and David E Logan,
Optical and transport properties of heavy fermions: theory compared to experiment,
Journal of Physics: Condensed Matter,
17, 2959 - 2976 (2005).
pdf
18. David E Logan and N S Vidhyadhiraja,
Dynamics and transport properties of heavy fermions: theory,
Journal of Physics: Condensed Matter,
17, 2935 - 2958 (2005).
pdf
19. N S Vidhyadhiraja and David E Logan,
Dynamics and scaling in the periodic Anderson model,
European Physical Journal B,
39, 313 - 334 (2004).
pdf
20. N S Vidhyadhiraja, Victoria E Smith, David E Logan and H R Krishnamurthy,
Dynamics and transport properties of Kondo insulators,
Journal of Physics: Condensed Matter,
15, 4045 - 4087 (2003).
21. N S Vidhyadhiraja, A N Tahvildar-Zadeh, M Jarrell and H R Krishnamurthy,
Exhaustion physics in the periodic Anderson model from iterated perturbation theory,
Europhysics Letters,
49, 459 - 465 (2000).
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