@article{7066, abstract = {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.}, author = {Zhu, Z. and McDonald, R. D. and Shekhter, A. and Ramshaw, B. J. and Modic, Kimberly A and Balakirev, F. F. and Harrison, N.}, issn = {2045-2322}, journal = {Scientific Reports}, publisher = {Springer Nature}, title = {{Magnetic field tuning of an excitonic insulator between the weak and strong coupling regimes in quantum limit graphite}}, doi = {10.1038/s41598-017-01693-5}, volume = {7}, year = {2017}, }