Publication Date:
2013-12-21
Description:
The motion of electrons in a solid has a profound effect on its topological properties and may result in a nonzero Berry's phase, a geometric quantum phase encoded in the system's electronic wave function. Despite its ubiquity, there are few experimental observations of Berry's phase of bulk states. Here, we report detection of a nontrivial pi Berry's phase in the bulk Rashba semiconductor BiTeI via analysis of the Shubnikov-de Haas (SdH) effect. The extremely large Rashba splitting in this material enables the separation of SdH oscillations, stemming from the spin-split inner and outer Fermi surfaces. For both Fermi surfaces, we observe a systematic pi-phase shift in SdH oscillations, consistent with the theoretically predicted nontrivial pi Berry's phase in Rashba systems.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Murakawa, H -- Bahramy, M S -- Tokunaga, M -- Kohama, Y -- Bell, C -- Kaneko, Y -- Nagaosa, N -- Hwang, H Y -- Tokura, Y -- New York, N.Y. -- Science. 2013 Dec 20;342(6165):1490-3. doi: 10.1126/science.1242247.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉RIKEN Center for Emergent Matter Science (Center for Emergent Matter Science), Wako 351-0198, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24357313" target="_blank"〉PubMed〈/a〉
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
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Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
