Observation of pseudogap behaviour in a strongly interacting Fermi gas

Nature Physics

Volumn 6, Issue 8, 2010, Pages 569-573

  Gaebler, J P ^a   Stewart, J T ^a   Drake, T E ^a   Jin, D S ^a   Perali, A ^b   Pieri, P ^b   Strinati, G C ^b  

^a UNIVERSITY OF COLORADO   (United States)

^b UNIVERSITY OF CAMERINO   (Italy)

Author keywords

[No Author keywords available]

Indexed keywords

CONDENSATION; ELECTRON GAS; PHOTOELECTRON SPECTROSCOPY; TEMPERATURE;

ATTRACTIVE INTERACTIONS; BARDEEN-COOPER-SCHRIEFFER; DIRECT OBSERVATIONS; FERMI TEMPERATURE; FERMIONIC SYSTEMS; INDEPENDENT MEASUREMENT; SINGLE-PARTICLE SPECTRAL FUNCTION; STRONG INTERACTION;

FERMIONS;

EID: 77955245706     PISSN: 17452473     EISSN: 17452481     Source Type: Journal    
DOI: 10.1038/nphys1709     Document Type: Article

References (30)

1. Regal, C. A. & Jin, D. S. Experimental realization of the BCS-BEC crossover with a Fermi gas of atoms. Adv. Atom. Mol. Opt. Phys. 54, 1-79 (2006).
2. Ketterle, W. & Zwierlein, M. W. in Proc. of the International School of Physics ̀Enrico Fermi', Course CLXIV (eds Inguscio, M., Ketterle, W. & Salomon, C.) 95-287 (IOS Press, 2008).
3. Janko, B., Maly, J. & Levin, K. Pseudogap effects induced by resonant pair scattering. Phys. Rev. B 56, R11407-R11410 (1997).
4. Randeria, M. in Proc. of the International School of Physics ̀Enrico Fermi', Course CXXXVI (eds Iadonisi, G., Schrieffer, J. R. & Chiafalo, M. L.) 115-139 (IOS Press, 1998).
5. Perali, A., Pieri, P., Strinati, G. C. & Castellani, C. Pseudogap and spectral function from superconducting fluctuations to the bosonic limit. Phys. Rev. B 66, 024510 (2002).
6. Stewart, J. T., Gaebler, J. P. & Jin, D. S. Using photoemission spectroscopy to probe a strongly interacting Fermi gas. Nature 454, 744-747 (2008).
7. Damascelli, A. Probing the electronic structure of complex systems by ARPES. Phys. Scr. T109, 61-74 (2004).
8. Kanigel, A. et al. Evidence for pairing above Tc from the dispersion in the pseudogap phase of cuprates. Phys. Rev. Lett. 101, 137002 (2008).
9. Randeria, M., Trivedi, N., Moreo, A. & Scalettar, R. T. Pairing and spin gap in the normal state of short coherence length superconductors. Phys. Rev. Lett. 69, 2001-2004 (1992).
10. Sá de Melo, C. A. R., Randeria, M. & Engelbrecht, J. R. Crossover from BCS to Bose superconductivity: Transition temperature and time-dependent Ginzburg-Landau theory. Phys. Rev. Lett. 71, 3202-3205 (1993).
11. Yanase, Y. & Yamada, K. Theory of pseudogap phenomena in high-Tc cuprates based on the strong coupling superconductivity. J. Phys. Soc. Jpn 68, 2999-3015 (1999).
12. Bruun, G. M. & Baym, G. Bragg spectroscopy of cold atomic Fermi gases. Phys. Rev. A 74, 033623 (2006).
13. Massignan, P., Bruun, G. M. & Stoof, H. T. C. Twin peaks in rf spectra of Fermi gases at unitarity. Phys. Rev. A 77, 031601(R) (2008).
14. Barnea, N. Superfluid to insulator phase transition in a unitary Fermi gas. Phys. Rev. A 78, 053629 (2008).
15. Magierski, P., Wlazlowski, G., Bulgac, A. & Drut, J. E. The finite temperature pairing gap of a unitary Fermi gas by quantum Monte Carlo. Phys. Rev. Lett. 103, 210403 (2009).
16. Chen, Q., He, Y., Chien, C. C. & Levin, K. Theory of radio frequency spectroscopy experiments in ultracold Fermi gases and their relation to photoemission experiments in the cuprates. Rep. Prog. Phys. 72, 122501 (2009).
17. Tsuchiya, S., Watanabe, R. & Ohashi, Y. Single-particle properties and pseudogap effects in the BCS-BEC crossover regime of an ultracold Fermi gas above Tc. Phys. Rev. A 80, 033613 (2009).
18. Haussmann, R., Punk, M. & Zwerger, W. Spectral functions and rf response of ultracold fermionic atoms. Phys. Rev. A 80, 063612 (2009).
19. Chin, C. et al. Observation of the pairing gap in a strongly interacting Fermi gas. Science 305, 1128-1130 (2004).
20. Schirotzek, A., Shin, Y., Schunck, C. H. & Ketterle, W. Determination of the superfluid gap in atomic Fermi gases by quasiparticle spectroscopy. Phys. Rev. Lett. 101, 140403 (2008).
21. Regal, C. A., Greiner, M. & Jin, D. S. Observation of resonance condensation of fermionic atom pairs. Phys. Rev. Lett. 92, 040403 (2004).
22. Chen, Q. & Levin, K. Probing the spectral function using momentum resolved radio frequency spectroscopy in trapped Fermi gases. Phys. Rev. Lett. 102, 190402 (2009).
23. Tan, S. Large momentum part of a strongly correlated Fermi gas. Ann. Phys. 323, 2971-2986 (2008).
24. Schneider, W. & Randeria, M. Universal short-distance structure of the single-particle spectral function of dilute Fermi gases. Phys. Rev. A 81, 021601 (2010).
25. Stewart, J. T., Gaebler, J. P., Drake, T. E. & Jin, D. S. Verification of universal relations in a strongly interacting Fermi gas. Phys. Rev. Lett. 104, 235301 (2010).
26. Zwierlein, M. W., Abo-Shaeer, J. R., Schirotzek, A., Schunck, C. H. & Ketterle, W. Vortices and superfluidity in a strongly interacting Fermi gas. Nature 435, 1047-1051 (2005).
27. Perali, A., Pieri, P. & Strinati, G. C. Extracting the condensate density from projection experiments with Fermi gases. Phys. Rev. Lett. 95, 010407 (2005).
28. Matyjakiewicz, S., Szymaska, M. H. & Góral, K. Probing fermionic condensates by fast-sweep projection onto Feshbach molecules. Phys. Rev. Lett. 101, 150410 (2008).
29. Zwierlein, M. W., Schunck, C. H., Stan, C. A., Raupach, S. M. F. & Ketterle, W. Formation dynamics of a fermion pair condensate. Phys. Rev. Lett. 94, 180401 (2005).
30. Stewart, J. T., Gaebler, J. P., Regal, C. A. & Jin, D. S. Potential energy of a 40K Fermi gas in the BCS-BEC crossover. Phys. Rev. Lett. 97, 220406 (2006).