Volume 88, Number 6, December 2009
Article Number 67002
Number of page(s) 6
Section Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
Published online 01 December 2009
EPL, 88 (2009) 67002
DOI: 10.1209/0295-5075/88/67002

A scheme for accurate detection of molecular bonds in quantum dots

Y. X. Deng and X. H. Yan

College of Science, Nanjing University of Aeronautics and Astronautics - Nanjing, 210016, China

received 21 May 2009; accepted in final form 20 November 2009; published December 2009
published online 22 December 2009

We propose a closed two-terminal Aharonov-Bohm (AB) interferometer which contains a double quantum dot to detect the coherent molecule-like states. This scheme is based on the measurement of AB oscillation properties by changing interdot coupling strength. By comparison with an open multiterminal AB setup, we find that due to the phase locking effect the initial phase of the AB oscillations changes from $\pi /2$ to $3\pi /2$ with the increase of the interdot coupling. The crossover implies the transition from the nearly decoupled states with the increase of the to the merged artificial molecular states.

73.23.-b - Electronic transport in mesoscopic systems.
73.63.-b - Electronic transport in nanoscale materials and structures.
72.10.Bg - General formulation of transport theory.

© EPLA 2009