Zenia, H. ; Freericks, J. K. ; Krishnamurthy, H. R. ; Pruschke, Th. (2009) Appearance of "fragile" fermi liquids in finite-width mott insulators sandwiched between metallic leads Physical Review Letters, 103 (11). 116402_1-116402_4. ISSN 0031-9007
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Official URL: http://prl.aps.org/abstract/PRL/v103/i11/e116402
Related URL: http://dx.doi.org/10.1103/PhysRevLett.103.116402
Abstract
Using inhomogeneous dynamical mean-field theory, we show that the normal-metal proximity effect could force any finite number of Mott-insulating "barrier" planes sandwiched between semi-infinite metallic leads to become "fragile" Fermi liquids. They are fully Fermi-liquid-like at T=0, leading to a restoration of lattice periodicity at zero frequency, with a well-defined Fermi surface, and perfect (ballistic) conductivity. However, the Fermi-liquid character can rapidly disappear at finite ω, V, T, disorder, or magnetism, all of which restore the expected quantum tunneling regime, leading to fascinating possibilities for nonlinear response in devices.
Item Type: | Article |
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Source: | Copyright of this article belongs to American Physical Society. |
ID Code: | 17570 |
Deposited On: | 16 Nov 2010 09:31 |
Last Modified: | 04 Jun 2011 08:32 |
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