Excitations and impurity dynamics in a fermionic Mott insulator with nearest-neighbor interactions

A. M. Visuri, T. Giamarchi, Päivi Törmä*

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

4 Sitaatiot (Scopus)
250 Lataukset (Pure)

Abstrakti

We study analytically and with the numerical time-evolving block decimation method the dynamics of an impurity in a bath of spinless fermions with nearest-neighbor interactions in a one-dimensional lattice. The bath is in a Mott insulator state with alternating sites occupied and the impurity interacts with the bath by repulsive on-site interactions. We find that when the magnitudes of the on-site and nearest-neighbor interactions are close to each other, the system shows excitations of two qualitatively distinct types. For the first type, a domain wall and an antidomain wall of density propagate into opposite directions, while the impurity stays at the initial position. For the second one, the impurity is bound to the antidomain wall while the domain wall propagates, an excitation where the impurity and bath are closely coupled.

AlkuperäiskieliEnglanti
Artikkeli125110
Sivut1-10
JulkaisuPhysical Review B
Vuosikerta93
Numero12
DOI - pysyväislinkit
TilaJulkaistu - 8 maaliskuuta 2016
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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