%0 Journal Article %1 Borisenko2009 %A Borisenko, S. V. %A Kordyuk, A. A. %A Zabolotnyy, V. B. %A Inosov, D. S. %A Evtushinsky, D. %A Büchner, B. %A Yaresko, A. N. %A Varykhalov, A. %A Follath, R. %A Eberhardt, W. %A Patthey, L. %A Berger, H. %D 2009 %I American Physical Society %J Phys. Rev. Lett. %K imported %N 16 %P 166402 %R 10.1103/PhysRevLett.102.166402 %T Two Energy Gaps and Fermi-Surface ``Arcs'' in $NbSe_2$ %V 102 %X Using angle-resolved photoemission spectroscopy, we report on the direct observation of the energy gap in 2H-NbSe2 caused by the charge-density waves (CDW). The gap opens in the regions of the momentum space connected by the CDW vectors, which implies a nesting mechanism of CDW formation. In remarkable analogy with the pseudogap in cuprates, the detected energy gap also exists in the normal state (T>T0) where it breaks the Fermi surface into “arcs,” it is nonmonotonic as a function of temperature with a local minimum at the CDW transition temperature (T0), and it forestalls the superconducting gap by excluding the nested portions of the Fermi surface from participating in superconductivity.

@article{Borisenko2009, abstract = {Using angle-resolved photoemission spectroscopy, we report on the direct observation of the energy gap in 2H-NbSe2 caused by the charge-density waves (CDW). The gap opens in the regions of the momentum space connected by the CDW vectors, which implies a nesting mechanism of CDW formation. In remarkable analogy with the pseudogap in cuprates, the detected energy gap also exists in the normal state (T>T0) where it breaks the Fermi surface into “arcs,” it is nonmonotonic as a function of temperature with a local minimum at the CDW transition temperature (T0), and it forestalls the superconducting gap by excluding the nested portions of the Fermi surface from participating in superconductivity.}, added-at = {2010-11-06T00:14:39.000+0100}, author = {Borisenko, S. V. and Kordyuk, A. A. and Zabolotnyy, V. B. and Inosov, D. S. and Evtushinsky, D. and B\"uchner, B. and Yaresko, A. N. and Varykhalov, A. and Follath, R. and Eberhardt, W. and Patthey, L. and Berger, H.}, biburl = {https://www.bibsonomy.org/bibtex/28e4851d309c5e65c54fafdbad6a88c5c/nplumb}, doi = {10.1103/PhysRevLett.102.166402}, file = {:C\:\\Users\\Nick\\Documents\\Papers\\Borisenko et al. - Two energy gaps and Fermi-surface arcs in NbSe2.pdf:PDF}, interhash = {9fbbd76c1956552ef226b9eb5149deac}, intrahash = {8e4851d309c5e65c54fafdbad6a88c5c}, journal = {Phys. Rev. Lett.}, keywords = {imported}, month = Apr, number = 16, numpages = {4}, owner = {Nick}, pages = 166402, publisher = {American Physical Society}, timestamp = {2010-11-06T00:14:40.000+0100}, title = {Two Energy Gaps and Fermi-Surface ``Arcs'' in $NbSe_{2}$}, volume = 102, year = 2009 }