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Collective excitations in the quasi-one-dimensional conductor K0.3MoO3 (CROSBI ID 167385)

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Bonačić Lošić, Željana Collective excitations in the quasi-one-dimensional conductor K0.3MoO3 // Journal of physics. Condensed matter, 22 (2010), 485603-485610. doi: 10.1088/0953-8984/22/48/485603

Podaci o odgovornosti

Bonačić Lošić, Željana

engleski

Collective excitations in the quasi-one-dimensional conductor K0.3MoO3

We investigate collective mode dispersions for the tight-binding dielectric matrix with two one-dimensional electron bands and the three-dimensional long-range Coulomb electron–electron interaction within the random phase approximation. The hybridized collective modes are the result of coupling between the intraband plasmon and the interband dipolar mode due to monopole–dipole Coulomb interaction. Our calculations show the existence of the renormalized plasmon mode below and the dipolar mode above the interband electron–hole quasi-continuum in the long-wavelength limit, as well as a distinct experimentally observable feature in the energy-loss function for large wavevectors in the region of interband excitations. The modes and features obtained are brought into correspondence with the data obtained from electron energy-loss spectroscopy measurements on a quasi-one-dimensional metal, the blue bronze K0.3MoO3.

collective modes; dielectric function; energy-loss function

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Podaci o izdanju

22

2010.

485603-485610

objavljeno

0953-8984

10.1088/0953-8984/22/48/485603

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Fizika

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