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.
Electronic structure and fluctuation effects in the spin-1/2 quantum magnet TiOCl / Sing M.; Hoinkis M.; Schafer J.; Klemm M.; Horn S.; Benthien H.; Jeckelmann E.; Pisani L.; Valenti R.; Claessen R.. - In: JOURNAL DE PHYSIQUE IV. - ISSN 1155-4339. - ELETTRONICO. - 131:(2005), pp. 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.
