Use ampersand in selector name with SASS

Here's what i have in my CSS file ...

.search-doctors-box {
    position: relative;
    z-index: 999;
    margin: 0px;
}

.search-doctors-box--at-map {
    position: absolute;
    margin-bottom: 10px;
    top: 0px;
    left: 415px;
    width: 680px;
}

I want to achieve this in SASS using the & as the parent selector name and to join it with the rest of the string...

.search-doctors-box {
    position: relative;
    z-index: 999;
    margin: 0px;

    &--at-map {
        position: absolute;
        margin-bottom: 10px;
        top: 0px;
        left: 415px;
        width: 680px;
    }
}

Is it possible?

Thanks!