Effect Of Electron Doping The Metamagnet Sr_(3-y)la_yru_2o_7

J. Farrell; R. S. Perry; A. Rost; J. F. Mercure; N. Kikugawa; S. A. Grigera; A. P. Mackenzie

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Effect Of Electron Doping The Metamagnet Sr_(3-y)la_yru_2o_7

机译：电子掺杂超磁体Sr_（3-y）la_yru_2o_7的作用

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We study the effects of adding electrons to the conduction bands of the itinerant metamagnet Sr_3Ru_2O_7 using substitution of La~(3+) onto the Sr~(2+) site. Small changes to the chemical potential have a large effect: adding only 0.03 electrons per Ru reduces the electronic specific-heat coefficient by 30%, but makes no corresponding change to the temperature (～8 K) at which the electronic specific-heat coefficient shows its maximum. The observations are incompatible with a simple rigid-band shift, raising the possibility that a many-body resonance plays a key role in the physics of Sr_3Ru_2O_7.

机译：我们研究了通过将La〜（3+）置换到Sr〜（2+）位置上将电子添加到巡回超磁铁Sr_3Ru_2O_7的导带中的作用。化学势的微小变化会产生很大的影响：每Ru仅添加0.03个电子会使电子比热系数降低30％，但对电子比热系数显示的温度（〜8 K）却没有相应的变化最大。这些观察结果与简单的刚性带位移不兼容，从而增加了多体共振在Sr_3Ru_2O_7的物理学中起关键作用的可能性。

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《Physical review》 |2008年第18期|41-44|共4页
作者
J. Farrell; R. S. Perry; A. Rost; J. F. Mercure; N. Kikugawa; S. A. Grigera; A. P. Mackenzie;
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magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.); transition metals and alloys; ruthenates;

机译：磁性相界（包括磁跃迁;超磁性等）;过渡金属和合金;钌酸盐;

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Effect Of Electron Doping The Metamagnet Sr_(3-y)la_yru_2o_7

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