{"product_id":"non-universal-superconducting-gap-structure-in-kenichiro-hashimoto-9784431542933","title":"Non-Universal Superconducting Gap Structure in Iron-Pnictides Revealed by Magnetic Penetration Depth Measurements","description":"\u003cp\u003eIn this book the author presents two important findings revealed by high-precision magnetic penetration depth measurements in iron-based superconductors which exhibit high-transition temperature superconductivity up to 55 K: one is the fact that the superconducting gap structure in iron-based superconductors depends on a detailed electronic structure of individual materials, and the other is the first strong evidence for the presence of a quantum critical point (QCP) beneath the superconducting dome of iron-based superconductors.\u003c\/p\u003e\u003cp\u003eThe magnetic penetration depth is a powerful probe to elucidate the superconducting gap structure which is intimately related to the pairing mechanism of superconductivity. The author discusses the possible gap structure of individual iron-based superconductors by comparing the gap structure obtained from the penetration depth measurements with theoretical predictions, indicating that the non-universal superconducting gap structure in iron-pnictides can be interpreted in the framework of \u003ci\u003eA\u003c\/i\u003e\u003csub\u003e1g\u003c\/sub\u003e symmetry. This result imposes a strong constraint on the pairing mechanism of iron-based superconductors.\u003c\/p\u003e\u003cp\u003eThe author also shows clear evidence for the quantum criticality inside the superconducting dome from the absolute zero-temperature penetration depth measurements as a function of chemical composition. A sharp peak of the penetration depth at a certain composition demonstrates pronounced quantum fluctuations associated with the QCP, which separates two distinct superconducting phases. This gives the first convincing signature of a second-order quantum phase transition deep inside the superconducting dome, which may address a key question on the general phase diagram of unconventional superconductivity in the vicinity of a QCP.\u003c\/p\u003e \u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eAuthor:\u003c\/b\u003e Kenichiro Hashimoto\u003cbr\u003e\u003cb\u003eISBN-10:\u003c\/b\u003e 4431542930\u003cbr\u003e\u003cb\u003eISBN-13:\u003c\/b\u003e 9784431542933\u003cbr\u003e\u003cb\u003ePublisher:\u003c\/b\u003e Springer\u003cbr\u003e\u003cb\u003eLanguage:\u003c\/b\u003e English\u003cbr\u003e\u003cb\u003ePublished:\u003c\/b\u003e 02\/27\/2013\u003cbr\u003e\u003cb\u003ePages:\u003c\/b\u003e 125\u003cbr\u003e\u003cb\u003eFormat:\u003c\/b\u003e Hardcover\u003cbr\u003e\u003cb\u003eWeight:\u003c\/b\u003e 0.75lbs\u003cbr\u003e\u003cb\u003eSize:\u003c\/b\u003e 9.20h x 6.10w x 0.60d\u003c\/p\u003e","brand":"Kenichiro Hashimoto","offers":[{"title":"Hardcover","offer_id":48874285433087,"sku":"9784431542933","price":109.99,"currency_code":"USD","in_stock":true}],"url":"https:\/\/www.whiterainbookhouse.com\/products\/non-universal-superconducting-gap-structure-in-kenichiro-hashimoto-9784431542933","provider":"WR Book House","version":"1.0","type":"link"}