Renormalization group method was used to calculate the tunneling conductance around the singlet-triplet crossover region through a quantum dot system with two orbitals. The redistribution of the two electrons in the lower energy orbital to gain Hund's coupling energy was studied. Analysis suggested that the singlet-triplet peaks in the density of states cross at the Fermi energy of the leads. Good agreement between the calculated and experimental results depicted continuous transition and large value of conductance around the singlet-triplet degeneracy at finite temperatures.
|Number of pages||4|
|Journal||Physical review letters|
|Publication status||Published - 2001 Nov 19|
ASJC Scopus subject areas
- Physics and Astronomy(all)