Coulomb blockade and insulator-to-metal quantum phase transition
We analyze an interplay between Coulomb blockade and quantum fluctuations in a coherent conductor (with dimensionless conductance g larger than unity) attached to an Ohmic shunt. We demonstrate that at T=0 the system can be either an insulator or a metal depending on whether its total resistance is...
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| Veröffentlicht in: | Europhysics letters 2002-10, Vol.60 (1), p.113-119 |
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| container_title | Europhysics letters |
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| creator | Golubev, D. S Zaikin, A. D |
| description | We analyze an interplay between Coulomb blockade and quantum fluctuations in a coherent conductor (with dimensionless conductance g larger than unity) attached to an Ohmic shunt. We demonstrate that at T=0 the system can be either an insulator or a metal depending on whether its total resistance is larger or smaller than $h/e^2\approx 25.8$ kΩ. In a metallic phase the Coulomb gap is fully suppressed by quantum fluctuations. We briefly discuss possible relation of this effect to recent experiments indicating the presence of a metal-insulator phase transition in 2d disordered systems. |
| doi_str_mv | 10.1209/epl/i2002-00327-4 |
| format | Article |
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| identifier | ISSN: 0295-5075 |
| ispartof | Europhysics letters, 2002-10, Vol.60 (1), p.113-119 |
| issn | 0295-5075 1286-4854 |
| language | eng |
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| source | IOP Publishing Journals |
| subjects | 71.10.-w 71.30.+h 72.10.-d |
| title | Coulomb blockade and insulator-to-metal quantum phase transition |
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