Technische Universität Braunschweig

output

20022026

most citedMagnetism, superconductivity, and pairing symmetry in Fe-based superconductors

715 citations

Showing 2014 · cond-mat.str-elShow all

5 papers · 2 filters

cond-mat.str-el2014★ 10 cited

Spin dynamics of the anisotropic spin-1 antiferromagnetic chain at finite magnetic fields

Yousef Rahnavard, Wolfram Brenig

We present results of a study of the antiferromagnetic spin-1 chain, subject to the simultaneous presence of single-ion anisotropy and external magnetic fields. Using quantum Monte…

cond-mat.str-el2014★ 14 cited

Resonant Charge Relaxation as a Likely Source of the Enhanced Thermopower in FeSi

Peijie Sun, Beipei Wei, Dirk Menzel +1

The enhanced thermopower of the correlated semiconductor FeSi is found to be robust against the sign of the relevant charge carriers. At $T$ \, $\approx$ \,70 K, the position of both…

cond-mat.str-el2014★ 66 cited

Spin and energy currents in integrable and nonintegrable spin-1/2 chains: A typicality approach to real-time autocorrelations

Robin Steinigeweg, Jochen Gemmer, Wolfram Brenig

We use the concept of typicality to study the real-time dynamics of spin and energy currents in spin-1/2 models in one dimension and at nonzero temperatures. These chains are the i…

cond-mat.str-el2014★ 25 cited

Luttinger-Liquid Behavior in the Alternating Spin-Chain System Copper Nitrate

B. Willenberg, H. Ryll, K. Kiefer +8

We determine the phase diagram of copper nitrate Cu(NO $_{3}$ ) $_{2} \cdot$ 2.5D $_{2}$ O in the context of quantum phase transitions and novel states of matter. We establish this compound as…

cond-mat.str-el2014★ 45 cited

Scaling of diffusion constants in the spin-1/2 XX ladder

R. Steinigeweg, F. Heidrich-Meisner, J. Gemmer +2

We study the dynamics of spin currents in the XX spin-1/2 ladder at finite temperature. Within the framework of linear response theory, we numerically calculate autocorrelation fun…