  We show that through an interdot off-site electron correlation in a double
quantum-dot (DQD) device, Kondo resonances emerge in the local density of
states without the electron spin-degree of freedom. We identify the physical
mechanism behind this phenomenon: rather than forming a spin singlet in the
device as required in the conventional Kondo physics, we found that exchange of
electron position between the two quantum dots, together with the off-site
Coulomb interaction, are sufficient to induce the Kondo resonance. Due to
peculiar co-tunneling events, the Kondo resonance in one dot may be pinned at
the chemical potential of the other one.
