We present a joint experimental and theoretical study of the spin-1/2 quantum magnet TiOCl. From polarization-dependent momentum-resolved photoemission spectroscopy we can exclude sizable phononinduced orbital fluctuations as origin for the non-canonical phenomenology of the spin-Peierls transition in this compound. While our data does confirm the quasi-one-dimensional character of the electronic structure along the crystallographic b-axis as inferred from previous LDA+U calculations these as well as other band and model calculations apparently fail to describe the detailed behavior of the quasi-one-dimensional dispersions in the normal state of this material.
Sing M., Hoinkis M., Schafer J., Klemm M., Horn S., Benthien H., et al. (2005). Electronic structure and fluctuation effects in the spin-1/2 quantum magnet TiOCl. JOURNAL DE PHYSIQUE IV, 131, 331-334 [10.1051/jp4:2005131083].
Electronic structure and fluctuation effects in the spin-1/2 quantum magnet TiOCl
Pisani L.Software
;
2005
Abstract
We present a joint experimental and theoretical study of the spin-1/2 quantum magnet TiOCl. From polarization-dependent momentum-resolved photoemission spectroscopy we can exclude sizable phononinduced orbital fluctuations as origin for the non-canonical phenomenology of the spin-Peierls transition in this compound. While our data does confirm the quasi-one-dimensional character of the electronic structure along the crystallographic b-axis as inferred from previous LDA+U calculations these as well as other band and model calculations apparently fail to describe the detailed behavior of the quasi-one-dimensional dispersions in the normal state of this material.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
