Theoretical study in strongly correlated electronic systems, high-temperature superconductivity, quantum magnetism
My main research interests are: theoretical study in strongly correlated electronic systems, high-temperature superconductivity, and quantum magnetism.
We live in a very interesting era of condensed matter physics. It has been understood for quite some time that many of the condensed matter systems cannot be described by the traditional "quasi-free" theory of electrons, due to strong Coulomb interaction. Examples include high-temperature superconductors, 2D electron systems, frustrated magnets, etc.
Nowadays, the theory is directed towards understanding and formulating new principles which would enable us to describe such systems successfully. That is, to give us a predictive power for new phenomena, and novel material properties.
I study complex properties of new materials using microscopic modeling, diagrammatic technique, and comparison with the numerical studies. In doing so I always try to connect to an existing experimental data or to make a verifiable prediction for a future experiment. I am interested in the novel quantum effects in strongly correlated electronic systems which include high-temperature superconductors, low-dimensional quantum magnets, and others.
This field is of great interest in part because the technological progress allows to create materials with highly nontrivial quantum properties.
see my web-page for a full list of publications
A. L. Chernyshev, "Field-dependence of magnon decay in yttrium iron garnet thin films", Phys. Rev. B 86, 060401(R) (2012).
A. L. Chernyshev, M. E. Zhitomirsky, N. Martin, and L.-P. Regnault, "Lifetime of gapped excitations in collinear quantum antiferromagnet", Phys. Rev. Lett. 109, 097201 (2012).
B. Fak, T. Keller, M. E. Zhitomirsky, and A. L. Chernyshev, "Roton-phonon interactions in Bose-condensed superfluid 4He", Phys. Rev. Lett. 109, (2012).
M. E. Zhitomirsky and A. L. Chernyshev, "Spontaneous Magnon Decays", Rev. Mod. Phys. , (2012).
Y. Kohama, A. V. Sologubenko, N. R. Dilley, V. S. Zapf, M. Jaime, J. A. Mydosh, A. Paduan-Filho, K. A. Al-Hassanieh, P. Sengupta, S. Gangadharaiah, A. L. Chernyshev, and C. D. Batista, "Thermal transport and strong mass renormalization in NiCl2-4SC(NH2)2", Phys. Rev. Lett. 106, 037203 (2011).
Suhas Gangadharaiah, A. L. Chernyshev, and Wolfram Brenig, "Thermal drag revisited: Boltzmann versus Kubo", Phys. Rev. B 82, 134421 (2010).
A. L. Chernyshev and M. E. Zhitomirsky, "Spin-waves in triangular lattice antiferromagnet: decays, spectrum renormalization, and singularities", Phys. Rev. B 79, 144416 (2009).
Cheng-Wei Liu, Shiu Liu, Ying-Jer Kao, A. L. Chernyshev, and Anders W. Sandvik, "Impurity-induced frustration in correlated oxides", Phys. Rev. Lett. 102, 167201 (2009).
S. R. White and A. L. Chernyshev, "Neel order in square and triangular lattice Heisenberg models", Phys. Rev. Lett. 99, 127004 (2007).
J. Smakov, A. L. Chernyshev, and S. R. White, "Binding of holons and spinons in the one-dimensional anisotropic t-J model", Phys. Rev. Lett. 98, 266401 (2007). preprint, paper.
A. L. Chernyshev and M. E. Zhitomirsky, "Magnon Decay in Noncollinear Quantum Antiferromagnets", Phys. Rev. Lett. 97, 207202 (2006).
A. V. Rozhkov and A. L. Chernyshev, "Thermal conductivity of quasi-one-dimensional antiferromagnetic spin-chain materials", Phys. Rev. Lett. 94, 087201 (2005).
A. L. Chernyshev, A. H. Castro Neto, and S. R. White, "Edge States in Doped Antiferromagnetic Nano-Structures", Phys. Rev. Lett. 94, 036407 (2005).
Tommaso Roscilde, Adrian Feiguin, Alexander L. Chernyshev, Shiu Liu, and Stephan Haas, "Anisotropy-induced ordering in the quantum J1-J2 antiferromagnet", Phys. Rev. Lett. 93, 17203 (2004).
A. L. Chernyshev and R. S. Fishman, "Spin Diffusion in Double-Exchange Manganites", Phys. Rev. Lett. 90, 177202 (2003).
A. L. Chernyshev, Y. C. Chen, and A. H. Castro Neto, "Long-range order and low-energy spectrum of diluted 2D quantum antiferromagnet", Phys. Rev. Lett. 87, 067209 (2001).
A. L. Chernyshev, A. H. Castro Neto, and A. R. Bishop, "Metallic stripe in two dimensions: stability and spin-charge separation", Phys. Rev. Lett. 84, 4922 (2000).
M. E. Zhitomirsky and A. L. Chernyshev, "Instability of antiferromagnetic magnons in strong fields" , Phys. Rev. Lett. 82, 4536 (1999).
American Physical Society
American Neutron Scattering Society