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Magnetic field tuning of an excitonic insulator between the weak and strong coupling regimes in quantum limit graphite.

Title: Magnetic field tuning of an excitonic insulator between the weak and strong coupling regimes in quantum limit graphite.
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Name(s): Zhu, Z, author
McDonald, R D, author
Shekhter, A, author
Ramshaw, B J, author
Modic, K A, author
Balakirev, F F, author
Harrison, N, author
Type of Resource: text
Genre: Journal Article
Text
Date Issued: 2017-05-04
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: The excitonic insulator phase has long been predicted to form in proximity to a band gap opening in the underlying band structure. The character of the pairing is conjectured to crossover from weak (BCS-like) to strong coupling (BEC-like) as the underlying band structure is tuned from the metallic to the insulating side of the gap opening. Here we report the high-magnetic field phase diagram of graphite to exhibit just such a crossover. By way of comprehensive angle-resolved magnetoresistance measurements, we demonstrate that the underlying band gap opening occurs inside the magnetic field-induced phase, paving the way for a systematic study of the BCS-BEC-like crossover by means of conventional condensed matter probes.
Identifier: FSU_pmch_28496192 (IID), 10.1038/s41598-017-01693-5 (DOI), PMC5431932 (PMCID), 28496192 (RID), 28496192 (EID), 10.1038/s41598-017-01693-5 (PII)
Publication Note: This NIH-funded author manuscript originally appeared in PubMed Central at https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5431932.
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_pmch_28496192
Host Institution: FSU
Is Part Of: Scientific reports.
2045-2322
Issue: iss. 1, vol. 7

Choose the citation style.
Zhu, Z., McDonald, R. D., Shekhter, A., Ramshaw, B. J., Modic, K. A., Balakirev, F. F., & Harrison, N. (2017). Magnetic field tuning of an excitonic insulator between the weak and strong coupling regimes in quantum limit graphite. Scientific Reports. Retrieved from http://purl.flvc.org/fsu/fd/FSU_pmch_28496192