Superconductivity magnetic field-induced

Balicas L, Behnia K, Kang W, Canadell E, Auban-Senzier P, Jerome D, Ribault M, Fabre JM (1994) Superconductivity and magnetic field induced spin density waves in the (TMTTF)2X family. J Phys I 4 1539-1549... 

Sushko YV, Ito H, Ishiguro T, Horiuchi S, Saito G (1993) Magnetic-field-induced transition to resistive phase in superconducting k-(BEDT-TTF)2Cu[N(CN)2]C1. J Phys Soc Jpn 62 3372-3375... 

Konoike T, Uji S, Terashima T, Nishimura M, Yasuzuka S, Enomoto K, Eujiwara H, Zhang B, Kobayashi H (2004) Magnetic-field-induced superconductivity in the antiferromagnetic organic superconductor K-(BETS)2peBr4. Phys Rev B70 094514/l-5... 

Uji S, Shinagawa H, Terashima T, Yakabe T, Terai Y, Tokumoto M, Kobayashi A, Tanaka H, Kobayashi H (2001) Magnetic-field-induced superconductivity in a two-dimensional organic conductor. Nature 410 908-910... 

Meul HW, Rossel C, Decroux M, Fischer 0, Remenyi G, Briggs A (1984) Observation of magnetic-field-induced superconductivity. Phys Rev Lett 53 497-500... 

Lin CL, Teter J, Crow JE, Mihalisin T, Brooks J, Abou-Aly AI, Stewart GR (1985) Observation of magnetic-field-induced superconductivity in a heavy-Eermion antiferro-magnet CePb3. Phys Rev Lett 54 2541-2544... 

In some organic conductors there is also magnetic field-induced superconductivity—for example, in /-(BETS TeCh at 17 T and 0.1 K [37], A new superconductor of picene (27) "doped" with alkali metals is reported to have TC = 18K [38]. Ca-intercalated graphite CaCf, superconducts below TC = 11.5K [39],... 

Some years later a more thorough discussion of the motion of pairs of electrons in a metal was given by Cooper,7 as well as by Abrikosov8 and Gor kov,9 who emphasized that the effective charge in superconductivity is 2e, rather than e. The quantization of flux in units hc/2e in superconducting metals has been verified by direct experimental measurement of the magnetic moments induced in thin films.10 Cooper s discussion of the motion of electron pairs in interaction with phonons led to the development of the Bardeen-Cooper-Schrieffer (BCS) theory, which has introduced great clarification in the field of superconductivity.2... 

Scientists are interested in superconductors because they have a number of properties that arise from their lack of resistance. For example, once a current is induced in a circuit made with a superconducting material, the current continues to flow through the circuit indefinitely, without ever diminishing. Also, superconductors have the ability to completely repel magnetic field lines. This means that a magnet placed over a superconductor hovers in mid-air, as shown in Figure 4.25. 

We have considered here the influence of dispersion asymmetry and Zee-man splitting on the Josephson current through a superconductor/quantum wire/superconductor junction. We showed that the violation of chiral symmetry in a quantum wire results in qualitatively new effects in a weak superconductivity. In particularly, the interplay of Zeeman and Rashba interactions induces a Josephson current through the hybrid ID structure even in the absence of any phase difference between the superconductors. At low temperatures (T critical Josephson current. For a transparent junction with small or moderate dispersion asymmetry (characterized by the dimensionless parameter Aa = (vif — v2f)/(vif + V2f)) it appears, as a function of the Zeeman splitting Az, abruptly at Az hvp/L. In a low transparency (D Josephson current at special (resonance) conditions is of the order of yfD. In zero magnetic field the anomalous supercurrent disappears (as it should) since the spin-orbit interaction itself respects T-symmetry. However, the influence of the spin-orbit interaction on the critical Josephson current through a quasi-ID structure is still anomalous. Contrary to what holds... 

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