Sanjoy K. Sarker

                                          Professor, Dept of Physics, University of Alabama

 

PUBLICATIONS

 

RECENT

 

Amogh Kinikar, T. Phanindra Sai, A. Agarwal, T. Biswas, Sanjoy K. Sarker, H. R. Krishnamurthy, Manish Jain, V. B. Shenoy and Arindam Ghosh, "Quantized edge  modes n atomic scale point contacts in graphene”.Nature Nanotechnology,  accepted Jan 6,

published online April3, 2017, nnnano 24.

 

T. Lovorn and Sanjoy K. Sarker,  “Complex quasi-two-dimensional crystalline order embedded in VO 2 and  other crystals”. Phys. Rev. Lett. 119, 045501 (2017)

 

S. K. Sarker and T. Lovorn,  “Spin-charge split pairing in underdoped cuprate superconductors: support  from low-T specific heat.” Submitted to PRL (2018), arXiv.org: 1705.10390

 

 

S. Keshavarz, J. Jones, A. Amiri, A. Singh, A. Gupta, S. Sarker, P. LeClair

“Low-frequency Noise Spectroscopy of Vanadium Dioxide  throughout the Metal-Insulator Transition”  (2018) To be submitted to PRB

 

 

High-Tc Superconductivity, Quantum Liquids

S. K. Sarker and T. Lovorn,  “Charge pair hopping and Bose-Einstein condensation in underdoped Mott insulators", ArXiv:0158312,  Phys. Rev. B85, 144502 (2012)

S. K. Sarker and T. Lovorn, “A consistent theory of underdoped cuprates: Evolution of the RVB state from half filling”, Phys. Rev. B82, 014504 (2010); arXiv:0910.2204v2 [cond-mat.str-el].

S. K. Sarker, "Metallic conduction and superconductvity in the pseudogap phase", cond-mat/LANL/ 0701288 (20070; Phys. Rev. B77, 052505 (2008).

S. K. Sarker, “Spin-Charge Separation and Kinetic Energy in the t-J Model”, Phys. Rev. B68, 085105 (2003).

S. K. Sarker  “On Possible Coexistence of Superconductivity and Charge Density Wave in Hole Doped C60”, Cond-Mat/LANL/0111500,(2001).

S. K. Sarker  “Spin-charge Recombination and Superconductivity in the t-J Model”, Phys. Rev. B61, 8663 (2000)

S. K. Sarker, “Confinement in the Three-dimensional Anisotropic t-J Model: A Mean-Field Study”, J. Phys. Chem. Solids 56, 1753 (1995).                                                

S. K. Sarker and P. W. Anderson, “Spin-Gap and Superconductivity in the Interlayer Pair Tunneling Model.”,  Cond-Mat/LANL/9704123 (1997).

Fengming Hu, S. K. Sarker and C. Jayaprakash, “Domain Walls,  Spiral States and Phase Separation in the Extended Hubbard Model: A Hartree-Fock Analysis”, Phys. Rev. B50, 17901 (1994).                                                                         

S. K. Sarker, C. Jayaprakash and H. R. Krishnamurthy, “Non-Fermi Liquid Behavior in the t-J Model: Role of Quantum Fluctuations”,  Physica C228, 309 (1994).         

S. K. Sarker, “Coulomb Interactions and the Stability of Spiral States in the t-J Model”, Phys. Rev. B47(Rapid Communications), 2940 (1993).                                                               

S. K. Sarker,  “Theory of Spin-Charge Separation and Recombination in the t-J Model”, Phys. Rev. B46, 8617 (1992).                     

S. K. Sarker, C. Jayaprakash, H. R. Krishnamurthy and W. Wenzel,  “Spiral States in the Square-Lattice Hubbard Model”, Phys. Rev. B43 (Rapid Communications) 8775 (1991).                                   

C. Jayaprakash, H. R. Krishnamurthy, S. K. Sarker, and W. Wenzel, “Metal-Insulator Transition in the Hubbard Model on a Triangular Lattice", Europhys. Lett. {\bf {15}}, 625 (1991).

H. R. Krishnamurthy, C. Jayaprakash, W. Wenzel and S. K. Sarker,  “The Mott-Hubbard Metal-Insulator Transition in Non-Bipartite Lattices”,  Phys. Rev. Lett.  64, 950 (1990).

S. K. Sarker, H. R. Krishnamurthy, C. Jayaprakash and W. Wenzel,  “Mean-Field Theories of Hubbard and t-J Model”, Physica C163, 541 (1990).                                                                   

H. R. Krishnamurthy, C. Jayaprakash, W. Wenzel and S. K. Sarker, “New  Mean-Field Theories of the Hubbard Model”, Physica C162-164, 1447 (1989).

C. Jayaprakash, H. R. Krishnamurthy and S. K. Sarker, “Mean-Field Theory for the t-J Model”, Phys. Rev B40 (Rapid Communications), 2610 (1989).

S. K. Sarker, C. Jayaprakash, H. R. Krishnamurthy and M. Ma, “A Bosonic Mean-Field Theory of Quantum Heisenberg Spin Systems-- Bose  Condensation and Magnetic Order”, Phys. Rev. B40, 5028 (1989).       

S.. K. Sarker, “Gutzwiller Approximation for the Emery Model”,  Phys. Rev. B39, 2155 (1989).                                         

S. K. Sarker, “A New Mean-Field Approximation to the Two-Band Model for Copper-Oxide Superconductors”, J. Phys. Cond. Matt. Lett. 1, 311 (1989).                                                       

S. K. Sarker, “A New Functional Integral Formalism for Strongly Correlated Fermi Systems”, J. Phys. C. Lett 21, L667 (1988).         

S. K. Sarker, “A Functional Intergral Method for the Strongly Correlated Hubbard Model”, in First two years of high-temperature superconductivity. Ed. R. M. Metzger, Gordon and Breach Sci. Pub.,  p353 (1988).   

Fullerides (Bucky Balls)

S. K. Sarker, “Metal Semimetal Transitions in Extended Hubbard  Model on the FCC Lattice: Implications for Superconducting Fullerides”,  Phys. Rev. B51, 3031 (1995).

S. K. Sarker, “Charge-Density-Wave Semimetallic and Superconducting States for A3C60”, Phys. Rev. B 49, 12047 (1994).  

S. K. Sarker and S. Lair, “Negative-U Hubbard model with long-range Coulomb interaction: Metal-insulator transition far from half filling", J. Phys. Condens. Matt. 17, 3885 (2005).     

Metal-Insulator Transition , LOCALIZATION

X. Zhong,  P. R. LeClair, S. K. Sarker, and A. Gupta, “Impedance spectroscopy of the metal-insulator transition in epitaxial VO­2 thin films on TiO2.” Phys. Rev. B 86, 094114 (2012).

S. K. Sarker,  “Metal Insulator Transition in Disordered and Interacting Systems”, (1998). ArXiv: Cond-Mat 9709135.

S. K. Sarker, “On the Self-consistency of the One-Parameter Scaling theory of Localization”, J. Phys. C Lett 16, L991 (1983).    

S. K. Sarker, “Inverse Localization Length in One Dimensional Anderson Model for Small Disorder”, Phys. Rev. B25 (Rapid Communications), 4304  (1982). 

S. K. Sarker and E. Domany, “Scaling Theory of Anderson Localization: A Renormalization-Group Approach”, Phys. Rev. B23, 6018 (1981).        

S. K. Sarker and E. Domany,  “A Scaling Theory of Anderson Localization”, J. Phys. C Lett. 13, L273 (1980).                    

E. Domany and S. K. Sarker,  “Renormalization-Group Study of  Anderson Localization”, Phys. Rev. B20, 4726 (1979).    

QUANTUM Magnetism

Holinsworth, B.S.; Mazumdar, D.; Sims, H.; Sun, Q.-C.; Yurtisigi, M.K.; Sarker, S.K.; Gupta, A.; Butler, W.H.; Musfeldt, J.L., "Chemical tuning of the optical band gap in spinel ferrites: CoFe2O4 vs NiFe2O4," Applied Physics Letters , vol.103, no.8, pp.082406,082406-4, Aug 2013

M. E. Williams, W. H. Butler, C. K. Mewes, H. Sims, M. Chshiev, and S. K. Sarker,  “Calculated electronic and magnetic structure of rutile phase V1−xCrxO2 “, J. Appl. Phys. 105 07E510 (2009)

J. Belev, A. Bandyopadhyay, W. H. Butler and S. K. Sarker,"Electronic and magnetic structure of transition-metal-doped alpha-hematite”, Phys. Rev. B71, 205208 (2005).

A. Bandyopadhyay, S. K. Sarker, J. Belev, W. H. Butler and O. Bengone, “Effect of electron-correlation on the electronic and magnetic properties of Ti-doped alpha hematite”, Phys. Rev. B69, 174429 (2004).

 S. K. Sarker, “Phase Transition in the Double-Exchange Model: A Schwinger Boson Approach”, J. Phys.Cond.Matt. 8, L515 (1996).           

Phase Transition, Critical Phenomena, Renormalization Group

S. K. Sarker, “Real Space Renormalization Group Method for the Ground State Properties of the Quantum Lattice Models”, Phys. Rev. B30, 2752 (1984).                          

R. Cordery, J. Tobochnik and S. K. Sarker, “Physics of the Dynamic Critical Exponent in One Dimensaion”, Phys. Rev. B24(RC), 5402 (1981).  

J. Tobochnik, S. K. Sarker and R. Cordery, “Dynamic Monte Carlo Renormalization Group”, Phys. Rev. Lett., 46, 1417 (1981).          

P. D. Beale, S. K. Sarker and J. A. Krumhansl, “Renormalization-Group Study of Cross-over in Structural Phase Transitions”, Phys. Rev. B24, 266 (1981).  

Quantum Transport Theory

Y. -K. Hu, J. W. Wilkins and S. K. Sarker, “Quantum Transport Equation  Approach to Nonequlibrium Screening”, in it Nanostructure Physics and Fabrication,  p 273 (1989), Eds. M. A. Reed and W. P. Kirk, Academic Press.

Y. -K. Hu, S. K. Sarker and J. W. Wilkins, “Quantum Kinetic Equation Approach to Semiconductor Hot-Carrier Screening”, Phys. Rev. B39, 8468 (1989). 

S. K. Sarker, Y. -K. Hu, C. J. Stanton and J. W. Wilkins, “Exact Solution of a Transport Equation for Hot-Electron Effects in Semiconductors and Metals", Phys. Rev. B35, 9229 (1987).

S. K. Sarker, J. H. Davies, F. S. Khan and J. W. Wilkins, “Quantum Corrections to Boltzmann Equation for High-Field Transport in Semiconductors”, Phys. Rev. B33, 7263 (1986).  

S. K. Sarker, “Quantum Transport Theory for High Electric Fields”, Phys. Rev B32, 743 (1985).  

 

Solitons                                      

S. K. Sarker and J. A. Krumhansl,  “Effect of Solitons on the Thermodynamic Properties of a System with Long-range Interactions”,  Phys. Rev. B23, 2374 (1981).                                

J. F. Currie, S. K. Sarker, A. R. Bishop, and S. E. Trullinger,  “Statistical Mechanics of One-dimensional Comples Scalar Fields with Phase Anisotropy”, Phys. Rev. A20, 2213 (1979).                  

S. K. Sarker, S. E. Trullinger, and A. R. Bishop, “Solitary-wave  solution for a complex one-dimensional field”, Phys. Lett. 59A, 255 (1976).      

 

Dark Matter, Supersymmetry, Biology

 

J Davidson,  S. K. Sarker and A. Stern, “"Possible Evidence of Thermodynamic Activity in Dark Matter Haloes",  arXiv:1302.2967, Feb 2013,  Astro.Phys.J, 788:37, 1 (2014).

 

L. C. Clavelli and S. K. Sarker, "Covalent Molecular Binding in a Susy Background", ArXiv:0811.1022, November 2008; Int. J. Mod. Phys. A , 24, 4245 (2009).

 

W. K. Lim, S. K. Sarker and J. K. Hardman, “Enzymatic Properties  of Mutant xi it coli Tryptophane Synthase alpha-Subunits”,  J. Biol. Chem, 266, 20205 (1991).                                    

 

Education and Science    

 

Q. Haider and S. K. Sarker, “Scientific research in Bangladesh: New opportunitites”, Op-Ed article in the Daily Star, Bangladesh, May 21, 2012.

 

Q. Haider and S. K. Sarker, “Science cannot coexist with backwardness”, Op-Ed article in the Daily Star, Bangladesh, Aug 7, 2012.

 

S. K. Sarker, “Only solution is a knowledge-based economy” Op-Ed article in Bengali in

Samakal, May 21, 2012,

 

 

Others

 

Ph.D. Dissertation, Cornell University: 1980.

Renormalization Group Study of Anderson Localization and Effect of Long-Range Interaction of Solitons.